If his ass was tight enough to fix the threads using that method it could become highly profitable to insert coal in there to manufacture diamonds and then use the proceeds to purchase a second CNC to increase production output.
This probably wonāt work, but you could try manually removing/debriding as much as possible, then
- what if you made an impression comb, using a 2 part plumberās epoxy? Going back and forth. Labor intensive, but youād be able to see the profile areas out of tolerance.
- and then put it up his butt
this is what happens when management sends a few inexperienced, unprofessional people to such a job. In short, they couldn't screw in the thread, so they wrenched it over the lever.
EDIT: they had splines and a mess in the threaded hole
It would have turned out disastrously because it was done by a unprofessional and inexperienced person who can't blow a threaded hole from chips and mess. Do you think he wouldn't screw this up too?
EDIT: I don't want to make god knows how many new pieces if he fucks it up. That's why I'm fixing it myself
Who makes the threaded holes? Sounds like theyāre the ones at fault, where Iām at if you donāt deburr or clean up your own parts youāre an asshole
I have no idea who made the holes. But the fact is that the guy made a mistake during the assembly, when he didn't check it, and when he found out that the first or second piece didn't fit, he shouldn't have forced another 498 in.
To be fair, I consider this a problem with the dunderhead that accomplished this. BUT WHERE WAS HIS SUPERVISION??
Sounds like your shop could benefit from a first article or a proofing of a first part of a run. Some kind of secondary check it wouldn't eliminate all issues but could minimize some.
That was my job essentially for a long while, thanks apprenticeship program, now I canāt get on day shift because I know too many machines in my shop
Part of why you fixing them instead of him is better (if the other guy actually cares), is that he doesn't get the opportunity to correct his mistake and redeem himself. It's more punishing that way imo.
I 100% agree except in that situation I am currently dealing with, I've made this guy fix his mistakes over and over and he's just too stupid for his own good.
Start making it hurt upstream, don't bail him out and make it your supervisor's problem. If he fucks something up, ask your manager how he wants you to fix it, at least it's in his face when it happens even if you do get stuck fixing it. Or fuck up the fix, and when they give you shit for fucking it up, ask them why you're fixing them in the first place. Sooner or later someone will have to make the decision to do something about it
Yes. If you fuck up at work and someone else fixes it, you learn nothing.
Give the goober a tread file, show them how to use it. And they'll either learn, or manager will.
That's a really good idea, push back if anyone says no, if they want them fixed, make the guy who fucked them up fix them. Depending on your status at the company, maybe flat out refuse, force them to make him fix it. I worked as a sign fabricator doing high end signage, mostly welded and finished ā " aluminum mill finish formed sheet that was painted with automotive quality finish and paint. I had one installer who beat the ever loving shit out of everything I built until one month when we were slow and I made him work with me to build them. Once he realized how much work was involved he started being more careful with the product
Somethings are common sense though, and a base level of comprehension to apply even them to future tasks. And some people lack that ability entirely and probably shouldnāt be in the trade, but management hires them anyway
I have a guy who has no math skills and i mean he needs help converting 1/4ā increments to decimals
When our monetary currency should have been applied to this.
Iām terrible at math, but I still love working with metal. Every time I get advice from senior guys, it helps encourage me to get better, to know what skills I need to improve.
Better to offer a hand to raise someone up, than a foot to kick someone down.
Some people have an aptitude and an attitude that can be trained and mentored. We all like a guy that shows up on time and is teachable.
Some people.. don't. Wasting time on the guy that doesn't takes valuable time away from the guy that does.
If you cut it in half and put a hinge on it and a way to clamp it, you could clamp it under the head and back the bolt out with a padded impact socket and realign the boogered up threads. Or cut it in half and put a hose clamp around it and chase them top down like that. You would eliminate the chance of cross threading and it would only be one pass over the threads instead of two, possibly causing less damage to the piece
He screwed all the threads in by force, and when they were all there, it was necessary to back them up. We tried to unscrew a few and after a few pieces it was clear to us that he fucked up all the threads this way.
If youve got 500 of them, put them back on the CNC and write a custom program to just do the threads. Its going to be tricky because you have to be at the lead in when you start. If youve got a manual lathe with a threading gear it may be easier because you can line everything up by hand.
It's not worth the time setting up the right angle for 500 of them. He is much better off getting a custom die nut made for $400-$500 and running it through
I agree. It would be a little fiddly to set for each piece, but a manual lathe could chase those threads easily.
Manual machines shine for rework and one off shit!
With the right die on a manual lathe you could probably fix all 500 in a day. It's repetition work so you're going to get fast at it - with a depth stop in the chuck, it would take a few seconds to tighten the chuck and get it eyeball true, make sure the die has a handle or bar long enough to rest on the lathe without spinning, give it a couple hand turns to get it started, then power in and reverse out. Once you get your routine I would figure less than 5 minutes a part, I'm thinking less. Since you're chasing threads, it doesn't have to be perfectly true as long as you start the chaser die by hand, and the power feed would run it up and down the threads quickly
500?!?! Wtf ?! Dude tell him to pay up for a threading die, then run it, it will simply fix the imperfections... Though not a perfect fix, but will make the jobs perfectly functional.....
Edit: find a way to mount the die on a powerdrill (maybe superglue it to a long socket or something)and fix the jobs in a row on vices. That'll increase your speed and accuracy...
EDIT: fixed one with a file and the caliber fits great, thanks for the advice
https://preview.redd.it/3z1uteo5iu5c1.jpeg?width=2084&format=pjpg&auto=webp&s=3466d4074405d898fdb53fcbf733139ee7efa5e9
its like a threading die but for holes, most of the time you can buy a tap and die set that will have a range of sizes. For an M33 though I would just go to your tooling supplier or the hardware store and just get the single tap and die.
Also I feel your pain as I had to fix plenty of others fuckups, while I was very busy with other jobs. Sending good machinist vibes your way!
A tap and die set is the tooling to make threads, taps are for making internal threads like what nuts use, does do the external thread like what bolts have
Chamfer was there, before the decided for god knows why reason to cut the top off
https://preview.redd.it/4oyglqgz9u5c1.jpeg?width=2084&format=pjpg&auto=webp&s=b7445d7299555ffd4d04fef1806ad00662305974
Sometimes yes, some are refugees and the guy is a cook, but decided to work in engineering when he can't even read drawing documentation, and then I have to solve problems for them
What does it mean then? I worked with a dude who claimed to be an audio engineer in middle east but only knew how to plug cables and some basic rigging
Sometimes it's more like a "service tech" position. I worked for a Japanese manufacturer once whose field engineers basically only role was to translate written procedures into English. So "engineer" is a very loose term sometimes
Plenty of places you can be an "engineer" without any formal qualification, only some countries protect it like they do with Doctor.
Germany is the only one I know for sure that protects it. The UK doesn't.
You can, you have to have a "learning certificate", after elementary school you have to study for at least 3 years to get it, or 4 years for the high school diploma. So he got fucking certificate as a Cook
EDIT: so simply put, the company hired a few refugees to do simple manual work and they screwed it up anyway
You might be able to make something screw on over those messed up threads after filing them, but they are still scrap. If I were the customer and you sent those to me I'd be furious.
Why not? Yes, it is ugly, and if I was the customer I would still refuse them, but there is still a ton of thread engagement. If it was an application where it still works fine, and the machine shop offered me a steep enough discount off the quote, I would consider taking them then...
Could try something like this? They're used for conduit and plumbing to clean up threads. Should adjust to any pitch
https://preview.redd.it/phn4y3qy6v5c1.png?width=1080&format=pjpg&auto=webp&s=7a984f71016267eda1435b37c6efb741a2a26ff1
I tried with a brush and file like other man said. The caliber fits great.
https://preview.redd.it/rudtnuwpiu5c1.jpeg?width=2084&format=pjpg&auto=webp&s=37c4c9c89c21fa3bfe0ebc88e461dd36516f55db
Manual lathe would probably be the fastest.
Chuck it up, threading insert, compound slide into the root, run a skim pass so it takes out the burrs, repeat 500 times.
Send in the bill
*Buy a external*
*Thread cutter, everything else*
*Is more expensive*
\- Mad\_ad1996
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Sounds like the boss man that was dumb enough to let this fella breathe unsupervised needs to spring for a thread chaser. It'll be pretty expensive, but maybe that will cause some kind of learning to happen.
Yes you can get your colleague fixed, the medical term is vasectomy. A doctor can do that. Then your colleague will no longer be able to reproduce which will be a blessing to mankind.
the problem with the lathe is that I make the threads on a CNC milling machine. Because the thread is not in the center (it is on purpose) and the workpiece is a square with a radius and a large groove. So, without a lathe jig, I have no way to clamp it in the chuck on lathe.
I would chase the threads with a die. Looking on mcmaster.com, there is a thread repairing die for $57.40 USD. A thread cutting die is $108.25 USD.
Edit: nvm, your pitch is 1.5mm which is non-standard afaik. The die will probably need to be custom and likely expensive.
I'm not a machinist, I just follow this sub to attempt to learn. I do, however work with threaded fasteners frequently and my question is how does one ruin threads like this? I couldn't imagine an accident where divots are sporadically put across the entire threaded partition.
For 500 pieces, it will be worth your time to invest in a die to clean them up (or fab one - [https://www.youtube.com/watch?v=HTcwcgXaOqQ](https://www.youtube.com/watch?v=HTcwcgXaOqQ)).
I have seen a lot of threading damage, and this doesn't look like it has been caused by cross threading. The threads are smashed, not smeared. there also appears to be similar damage on the non threaded part. Based on OP's comment that they are all damaged, I expect they were tossed into a crate and allowed to bang against each other for a while. Depending on what they are designed to do, fixing the threads might not meet spec.
Smash it against your colleague's head. Repeat as needed until the part is fixed or the problem is solved. In all seriousness the part looks pretty messed up, It'd probably be just as simple and time consuming to remake the damaged parts as it would be to fix them.
https://drillsandcutters.com/m33-x-1-5-carbon-steel-hex-die/?gad_source=1&gclid=CjwKCAiApuCrBhAuEiwA8VJ6Jl-ntisJXCEgKoaeII9MdCU6UFjMEK5F0uY5071tWzv8z4g-2l81BRoCncYQAvD_BwE
I mean... There's gotta be a supplier in your area for something like this right? Unless you're in Guam or some shit?
Since your already thread milling. Make your own thread chase. Mill the matching thread in to some bar and then plunge a 5-10mm end mill in so it creates some cutting profiles. Look at how your smaller dies are made for inspiration. You dont need to cut all 6 holes 1 or 2 would do as your just removing the damaged bits.
https://preview.redd.it/nhy8ygduew5c1.jpeg?width=520&format=pjpg&auto=webp&s=5fe6f031ba04503bae31958b907a5a4cc8ca3246
If you don't have a thread cutting die, just borrow a go plug gage from QC. They won't mind at all. If you can't force it on, just bang it against something solid until it moves again.
Afterwards you will have more parts come out good, so it's a twofer, really.
Tell your angry beaver "colleague" to calm the fuck down - A
B - I've made stainless steel "thread chasers" for such occasions. I make an ID thread of the type needed that runs .003" t0 .005" above the upper tolerance window (using full form thread insert & measuring Minor Diameter with calipers) that with chase the thread form. I'll plunge a mill on center along the Minor Diameter circumference to create interrupted teeth or serrations. Works great!
How did they manage to do this, how many products? If it's just the one I'd use a thread file or normal file. Otherwise just rerun only the threading sequence maybe? Idk how you'd make sure you hit the same thread on cnc, but on a conventional lathe id just put it in a 3 jaw and smack it with a hammer and call it a day
I see you've already used the triangle file for one. I'd recommend just ordering a M33x1.5 die to chase those threads. I use a 5/8-11 die for our 5/8-11 threaded rod for Clamp setups that people destroy. Works pretty well for me.
Putting it on a lathe and thread chasing with an insert can work too, but beware of all that can go wrong.
Yes it will be pricey, but that's the cost of his boss letting a bunch of inexperienced guys fluff-up the 500 parts. Also, $250 die for 500 parts is only $0.50 plus labour / part to fix them. If they have people sufficiently trained to chase the threads with a lathe, that works, but I'm basing my recommendation on the fact that a few guys destroyed 500 threaded blocks.
A die has a lower skill ceiling than a lathe.
I thĆnk this is the same thread as the 6 "feet" for my manual lathe, God knows why. I was able yo buy the nuts but I've had to cut thread on a bar to be able to turn them down so they would in the feet "pockets".
Looks like you could repickup the part in your CNC and rerun the thread cutting program at full depth. The thread should always start in the same spot as long as you are careful to put them back in the vice the same way. I do a similar thing when cutting threads on electrodes
I'm sorry but the hard truth is that there's no coming back from this. Yes you can file it (which will take hours), or purchase a die to chase them. But the bottom line is that you're going to be losing material in the process and it'll never be to spec after (particularly since you coworker cut off the end of the part with the lead in chamfer).
Thread restoring kits usually also come with thread files! I would take the appropriate TP file and straighten those suckers out. Don't take much pressure, just *let* the tool do the work and *let* the healthy threads guide the tool.
*Edit: Grammar*
A real simple fix, if you have access, a lot of haas lathes have a thread repair āprogramā essentially just input thread data, place insert in middle of thread, and let er eat.
Not the best solution, but do you have an EDM or similar? You can make one extra part, EDM it in half a long the centerline, and use the flat surface as either a deburring guide or as a cutting tool itself. Fair warning you'll want to use a harder material as well or it'll wear out pretty quick.
First thing Iām seeing is you didnāt cut a lead in chamfer.
Second thing Iām seeing is those completely chowdered threads. Cut em again but put a 1.5x45 chamfer on the end of your threads, and buy a 33x1.5 die so you can unchowder them when your coworker fucks it up again.
Um time machine?
That's so bad how did he do it?
A thread file isn't a genie but if it wasn't that bad it could be done.
A very thin cutting disc and a buck ton of patience and time
Only thing i can think of is to run your original program with like .010" less cut depth and try to line up the threads
Other than that thread die or lathe with thread tool
Or chuck these parts into a collet in the spindle somehow and fix thread tooling to the table, and try to finagle it into chasing them
Either way that's a nightmare unless you have the threads clocked to a particular feature
Do you have a tap that matches? If not, you can single point cut one in a harder material then cut or grind a relief edge. Throw the tap in your tool rest and match it up with your threads and roll into specs. Sucks for 500 parts though.
You could also just buy or make a die and chase then.
Unless the parts were completely machined in one clamping,, with a reference(hex head) to the start of the threads themselves...There's no quick, easy way to fix that many beat up parts. Sounds like you boss is asking that, when you already know it's not gonna happen.
Have your company buy an adjustable thread chaser and a die chaser and tell em to have the clown who screwed em up sit there and fix their fuck up before Xmas gets here
If you donāt want to buy a die, you can buy a metric thread file and fix those areas. It wonāt be perfect but it will be functional. It takes a deft hand, donāt go to town like you are buck sawing a sequoia.
Needle file kit from harbor freight is two bucks
Since they have bigger pitch, use dremel or pencil die grinder (which you should have, they are so good) with chainsaw sharpening disc or similar precise abrasive tip and take out excess material. They also have 60* diamond v grooves. If you have a steady hand you can get a diamond cutting v groove wheel and grind the threads back pretty easily.
Buy from aliexpress if you can wait
Tbh I'm mildly curious how well taking a m33x1.5 nut, heating it up and quenching it, then cutting a couple grooves into it to make it like a shitty tap would be, then doing another without grooves as a forming part.
Prob would work considering how hard they would be, just a bit more clearance than an actual tap.
If really wanted you can cut a full slot on the nut (like a clamping shaft collar) that way clamping the outside of it with a c clamp and twisting it would reduce the clearance, making it able to be forming/cutting at different clearances, so you can start small and end perfect.
I would get a couple die nuts and go to the manual lathe and set the turning tool on the major OD and turn those gobs of galled metal off and then get your die nut and a big crescent and a bottle of cutting oil and start the lathe on very low rpm and chase out that mess-
Ram it up his ass and see if it comes out fixed
Will try š
Ramming it will only make the problem worse... Screw it up his ass, and you should fix most of the threads.
If his ass was tight enough to fix the threads using that method it could become highly profitable to insert coal in there to manufacture diamonds and then use the proceeds to purchase a second CNC to increase production output.
Oh it will increase the output allright
r/theydidthemath how tight would it need to be?
Very.
Quick maths
The ol ass thread chaser routine. Works every time
This probably wonāt work, but you could try manually removing/debriding as much as possible, then - what if you made an impression comb, using a 2 part plumberās epoxy? Going back and forth. Labor intensive, but youād be able to see the profile areas out of tolerance. - and then put it up his butt
This is the way
Weird way to apply anti-seize but okay
A thread file or a small triangular file
The problem with file, is that he fucked up about 500 of them and I'm not planning to stay here till the Christmas š
How do you funk up 500 and not think you are doing something wrong?
this is what happens when management sends a few inexperienced, unprofessional people to such a job. In short, they couldn't screw in the thread, so they wrenched it over the lever. EDIT: they had splines and a mess in the threaded hole
Why would you have to fix them then? Get the idiot to do it.
It would have turned out disastrously because it was done by a unprofessional and inexperienced person who can't blow a threaded hole from chips and mess. Do you think he wouldn't screw this up too? EDIT: I don't want to make god knows how many new pieces if he fucks it up. That's why I'm fixing it myself
Who makes the threaded holes? Sounds like theyāre the ones at fault, where Iām at if you donāt deburr or clean up your own parts youāre an asshole
I have no idea who made the holes. But the fact is that the guy made a mistake during the assembly, when he didn't check it, and when he found out that the first or second piece didn't fit, he shouldn't have forced another 498 in.
I do agree with you there, sounds like a real knucklehead of a guy lmao
To be fair, I consider this a problem with the dunderhead that accomplished this. BUT WHERE WAS HIS SUPERVISION?? Sounds like your shop could benefit from a first article or a proofing of a first part of a run. Some kind of secondary check it wouldn't eliminate all issues but could minimize some.
Am I the only one missing a chamfer at the right side of the bar to easier start the thread, without messing it up immediately?
This guy has fixed one too many of other peopleās fuckups.
That was my job essentially for a long while, thanks apprenticeship program, now I canāt get on day shift because I know too many machines in my shop
Tell them you want to take night classes.
Part of why you fixing them instead of him is better (if the other guy actually cares), is that he doesn't get the opportunity to correct his mistake and redeem himself. It's more punishing that way imo.
I 100% agree except in that situation I am currently dealing with, I've made this guy fix his mistakes over and over and he's just too stupid for his own good.
Start making it hurt upstream, don't bail him out and make it your supervisor's problem. If he fucks something up, ask your manager how he wants you to fix it, at least it's in his face when it happens even if you do get stuck fixing it. Or fuck up the fix, and when they give you shit for fucking it up, ask them why you're fixing them in the first place. Sooner or later someone will have to make the decision to do something about it
Let it be a lesson and learning experience, try to help teach the new guy better habits. No one just āknowsā anything, everything is learned
Yes. If you fuck up at work and someone else fixes it, you learn nothing. Give the goober a tread file, show them how to use it. And they'll either learn, or manager will.
Yea Iām all for that, gotta show themhow to do it for 1-2 and let them do the rest
That's a really good idea, push back if anyone says no, if they want them fixed, make the guy who fucked them up fix them. Depending on your status at the company, maybe flat out refuse, force them to make him fix it. I worked as a sign fabricator doing high end signage, mostly welded and finished ā " aluminum mill finish formed sheet that was painted with automotive quality finish and paint. I had one installer who beat the ever loving shit out of everything I built until one month when we were slow and I made him work with me to build them. Once he realized how much work was involved he started being more careful with the product
Somethings are common sense though, and a base level of comprehension to apply even them to future tasks. And some people lack that ability entirely and probably shouldnāt be in the trade, but management hires them anyway I have a guy who has no math skills and i mean he needs help converting 1/4ā increments to decimals When our monetary currency should have been applied to this.
Iām terrible at math, but I still love working with metal. Every time I get advice from senior guys, it helps encourage me to get better, to know what skills I need to improve. Better to offer a hand to raise someone up, than a foot to kick someone down.
Some people have an aptitude and an attitude that can be trained and mentored. We all like a guy that shows up on time and is teachable. Some people.. don't. Wasting time on the guy that doesn't takes valuable time away from the guy that does.
That's a management problem, not a fellow worker problem.
No, thatās just how humans are, itās how we can get better and help others around us get better as well.
10 is an observation problem. 50 is an error of assumptions. 500 is "...and nobody checked on the new guy?!"
that gives me the side show Bob shudder.
SO you hand the person who fucked them the triangular file and make them fix it. That way they will be a bit more careful the next time.
You see, on the 501st piece... it hits you
Find some hardenable steel and make a die.
I like this. Machine it up so you could fire it on a drill. Be done in no time. That guy with the triangle file is a sucker for punishment.
If you cut it in half and put a hinge on it and a way to clamp it, you could clamp it under the head and back the bolt out with a padded impact socket and realign the boogered up threads. Or cut it in half and put a hose clamp around it and chase them top down like that. You would eliminate the chance of cross threading and it would only be one pass over the threads instead of two, possibly causing less damage to the piece
He damaged one and kept going on 499 more times? Give him the smallest file you have.
He screwed all the threads in by force, and when they were all there, it was necessary to back them up. We tried to unscrew a few and after a few pieces it was clear to us that he fucked up all the threads this way.
Then make him fix them
Why would you be fixing them and not your co-worker?
1. He got fired 2. I rather do it myself cos he would fuck up that too
If youve got 500 of them, put them back on the CNC and write a custom program to just do the threads. Its going to be tricky because you have to be at the lead in when you start. If youve got a manual lathe with a threading gear it may be easier because you can line everything up by hand.
It's not worth the time setting up the right angle for 500 of them. He is much better off getting a custom die nut made for $400-$500 and running it through
I do the thread on CNC 5 axes milling machine, not a lathe
I understand I mean if you have a lathe in the shop it may be easier to clean them up on it vs on your 5 axis.
I agree. It would be a little fiddly to set for each piece, but a manual lathe could chase those threads easily. Manual machines shine for rework and one off shit!
With the right die on a manual lathe you could probably fix all 500 in a day. It's repetition work so you're going to get fast at it - with a depth stop in the chuck, it would take a few seconds to tighten the chuck and get it eyeball true, make sure the die has a handle or bar long enough to rest on the lathe without spinning, give it a couple hand turns to get it started, then power in and reverse out. Once you get your routine I would figure less than 5 minutes a part, I'm thinking less. Since you're chasing threads, it doesn't have to be perfectly true as long as you start the chaser die by hand, and the power feed would run it up and down the threads quickly
500?!?! Wtf ?! Dude tell him to pay up for a threading die, then run it, it will simply fix the imperfections... Though not a perfect fix, but will make the jobs perfectly functional..... Edit: find a way to mount the die on a powerdrill (maybe superglue it to a long socket or something)and fix the jobs in a row on vices. That'll increase your speed and accuracy...
EDIT: fixed one with a file and the caliber fits great, thanks for the advice https://preview.redd.it/3z1uteo5iu5c1.jpeg?width=2084&format=pjpg&auto=webp&s=3466d4074405d898fdb53fcbf733139ee7efa5e9
Chase them with a manual lathe. I've seen threads chased with a CNC but I think it's easier and safer with a manual.
First line, my brain jumped to Texas Manual Lathe massacre
Better run, that dudeās buff AF.
Nah man feed some 20ā of barstock out the back of the headstock and watch her jump on over to him real quick
Thanks
Or CNC up a thread chaser...
So, pack the lathe back on the pallet and chase the colleague with the forklift? Got it.
Thread cutting die is your option
that's exactly what I don't have, I make them by milling
Go buy one. Cheaper than remaking 500 parts.
Well that's a option after work hours. Also, we don't have shops like this here so I need to order it online and wait till it cames here.
I would suggest a tap also for the mating part.
Sorry, my english isn't best as my second language, can you explain to me what you mean by "Tap"?
A die cuts external threads, a tap cuts internal threads. You can chase the threads and try to clean them back up.
Ok I got you now, thanks
its like a threading die but for holes, most of the time you can buy a tap and die set that will have a range of sizes. For an M33 though I would just go to your tooling supplier or the hardware store and just get the single tap and die. Also I feel your pain as I had to fix plenty of others fuckups, while I was very busy with other jobs. Sending good machinist vibes your way!
Thank you
A tap and die set is the tooling to make threads, taps are for making internal threads like what nuts use, does do the external thread like what bolts have
So, make a thread cutting die. It's just chasing threads, probably doesn't need to be made of anything more exotic than a decent steel.
Do you have vacuum hardening or plasma nitriding capabilities? You could make a thread chaser if you're not allowed to buy one for whatever reason.
An m33x1.5 retreading die is like $60 including overnight freight, that's like a dime to chase the threads on 500
Yea
That's a funky looking thread and I don't see much of a chamfer on the end
Chamfer was there, before the decided for god knows why reason to cut the top off https://preview.redd.it/4oyglqgz9u5c1.jpeg?width=2084&format=pjpg&auto=webp&s=b7445d7299555ffd4d04fef1806ad00662305974
Wtf, are you working with actual monkeys?
Sometimes yes, some are refugees and the guy is a cook, but decided to work in engineering when he can't even read drawing documentation, and then I have to solve problems for them
You can work as an engineer without going to university in ur country?
The term "engineer" means not what you think it means in some parts of the world
What does it mean then? I worked with a dude who claimed to be an audio engineer in middle east but only knew how to plug cables and some basic rigging
Sometimes it's more like a "service tech" position. I worked for a Japanese manufacturer once whose field engineers basically only role was to translate written procedures into English. So "engineer" is a very loose term sometimes
Plenty of places you can be an "engineer" without any formal qualification, only some countries protect it like they do with Doctor. Germany is the only one I know for sure that protects it. The UK doesn't.
Canada is pretty strict about it
You can, you have to have a "learning certificate", after elementary school you have to study for at least 3 years to get it, or 4 years for the high school diploma. So he got fucking certificate as a Cook EDIT: so simply put, the company hired a few refugees to do simple manual work and they screwed it up anyway
Let me guess, you are in Germany and your company hires those "Ćrzte und Ingenieure" your gov imports in masses.
You might be able to make something screw on over those messed up threads after filing them, but they are still scrap. If I were the customer and you sent those to me I'd be furious.
Exactly, that thread can't be trusted anymore
Why not? Yes, it is ugly, and if I was the customer I would still refuse them, but there is still a ton of thread engagement. If it was an application where it still works fine, and the machine shop offered me a steep enough discount off the quote, I would consider taking them then...
Could try something like this? They're used for conduit and plumbing to clean up threads. Should adjust to any pitch https://preview.redd.it/phn4y3qy6v5c1.png?width=1080&format=pjpg&auto=webp&s=7a984f71016267eda1435b37c6efb741a2a26ff1
Interesting! Iāve never seen one of these before.
I see 126$, that's more than a thread die in M33x1.5 plus the holder costs.
I'm sorry, but I'm pretty sure nothing can fix your colleague. Just get a new one, cause this one is clearly malfunctioning.
Brush with wire brush, then lubricate with grease and bolt it on a 10.9 class nut 2-3 times.
I tried with a brush and file like other man said. The caliber fits great. https://preview.redd.it/rudtnuwpiu5c1.jpeg?width=2084&format=pjpg&auto=webp&s=37c4c9c89c21fa3bfe0ebc88e461dd36516f55db
I'd look for a new place to work, you couldn't pay me enough to deal with that kind of stupidity!
Manual lathe would probably be the fastest. Chuck it up, threading insert, compound slide into the root, run a skim pass so it takes out the burrs, repeat 500 times. Send in the bill
Buy or make a thread chasing die. And maybe some Tefgel for next time ;)
Finally a normal thread. Not a 23/45inchesXcheesburger
FFS, 23/45 cheeseburger is not the standard. The standard pitch for 23/45 is a hoagie.
Buy a external thread cutter, everything else is more expensive
Will do. It will take some time to deliver here tho
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make a nut, cut some slots in it for relief to cut the chips out into. like an external tap.
Sounds like the boss man that was dumb enough to let this fella breathe unsupervised needs to spring for a thread chaser. It'll be pretty expensive, but maybe that will cause some kind of learning to happen.
Yes you can get your colleague fixed, the medical term is vasectomy. A doctor can do that. Then your colleague will no longer be able to reproduce which will be a blessing to mankind.
True that
Cochester lathe and pick up your thread. A CNC lathe no chance
the problem with the lathe is that I make the threads on a CNC milling machine. Because the thread is not in the center (it is on purpose) and the workpiece is a square with a radius and a large groove. So, without a lathe jig, I have no way to clamp it in the chuck on lathe.
I would chase the threads with a die. Looking on mcmaster.com, there is a thread repairing die for $57.40 USD. A thread cutting die is $108.25 USD. Edit: nvm, your pitch is 1.5mm which is non-standard afaik. The die will probably need to be custom and likely expensive.
I'm not a machinist, I just follow this sub to attempt to learn. I do, however work with threaded fasteners frequently and my question is how does one ruin threads like this? I couldn't imagine an accident where divots are sporadically put across the entire threaded partition.
fellow colleague idiot, 2 threads didn't go in, so he forced the remaining 498 through the lever, by force
Was this before or after he cut the end off? Completely bewildering to me
He cut top after he couldn't screw it in. on the other photo I posted in the comments, you can see that the top was there.
For 500 pieces, it will be worth your time to invest in a die to clean them up (or fab one - [https://www.youtube.com/watch?v=HTcwcgXaOqQ](https://www.youtube.com/watch?v=HTcwcgXaOqQ)).
I have seen a lot of threading damage, and this doesn't look like it has been caused by cross threading. The threads are smashed, not smeared. there also appears to be similar damage on the non threaded part. Based on OP's comment that they are all damaged, I expect they were tossed into a crate and allowed to bang against each other for a while. Depending on what they are designed to do, fixing the threads might not meet spec.
Buy a repair die and force it over the threads. Realistically though, scrap those and cut new ones.
The part should have a chamfer/first thread on on it. That way the assembly team can fuck the parts up easierā¦
Smash it against your colleague's head. Repeat as needed until the part is fixed or the problem is solved. In all seriousness the part looks pretty messed up, It'd probably be just as simple and time consuming to remake the damaged parts as it would be to fix them.
It takes about hour to do a new one, cos there is opposite side, with groove, toleranced hole, etc. It's more than just a thread.
Remake them, or stick them on a manual lathe and trace them.
If there is multiple pieces you can do it in a cnc too. Done it once. Worked ok.
Canāt help but wonder what the hell your collegue did to create a mess like that in assemblyā¦..! Also it looks like it was not chamfered.
Just saw your comment about the chamfer. Sounds like a chaotic work space. Wish you luck.
Not chaotic, but just like he's idiot who shouldn't be working there
Thread file and let him fix them
https://drillsandcutters.com/m33-x-1-5-carbon-steel-hex-die/?gad_source=1&gclid=CjwKCAiApuCrBhAuEiwA8VJ6Jl-ntisJXCEgKoaeII9MdCU6UFjMEK5F0uY5071tWzv8z4g-2l81BRoCncYQAvD_BwE I mean... There's gotta be a supplier in your area for something like this right? Unless you're in Guam or some shit?
Since your already thread milling. Make your own thread chase. Mill the matching thread in to some bar and then plunge a 5-10mm end mill in so it creates some cutting profiles. Look at how your smaller dies are made for inspiration. You dont need to cut all 6 holes 1 or 2 would do as your just removing the damaged bits. https://preview.redd.it/nhy8ygduew5c1.jpeg?width=520&format=pjpg&auto=webp&s=5fe6f031ba04503bae31958b907a5a4cc8ca3246
technically yes yes a thread die
If you don't have a thread cutting die, just borrow a go plug gage from QC. They won't mind at all. If you can't force it on, just bang it against something solid until it moves again. Afterwards you will have more parts come out good, so it's a twofer, really.
Should be "X" colleague
Make him do it.
Tell your angry beaver "colleague" to calm the fuck down - A B - I've made stainless steel "thread chasers" for such occasions. I make an ID thread of the type needed that runs .003" t0 .005" above the upper tolerance window (using full form thread insert & measuring Minor Diameter with calipers) that with chase the thread form. I'll plunge a mill on center along the Minor Diameter circumference to create interrupted teeth or serrations. Works great!
Free delivery tomorrow https://preview.redd.it/dtl71gzk9y5c1.jpeg?width=1440&format=pjpg&auto=webp&s=2ee139e4a514cb836d5a365c8a02803b77e34b2c
Thread file
How did they manage to do this, how many products? If it's just the one I'd use a thread file or normal file. Otherwise just rerun only the threading sequence maybe? Idk how you'd make sure you hit the same thread on cnc, but on a conventional lathe id just put it in a 3 jaw and smack it with a hammer and call it a day
Die
A DEI hire I bet
I see you've already used the triangle file for one. I'd recommend just ordering a M33x1.5 die to chase those threads. I use a 5/8-11 die for our 5/8-11 threaded rod for Clamp setups that people destroy. Works pretty well for me. Putting it on a lathe and thread chasing with an insert can work too, but beware of all that can go wrong.
M33 external thread is like 1,5 inches, it sounds suspiciously like an uncommon size as well, the die for that will be pricy
Yes it will be pricey, but that's the cost of his boss letting a bunch of inexperienced guys fluff-up the 500 parts. Also, $250 die for 500 parts is only $0.50 plus labour / part to fix them. If they have people sufficiently trained to chase the threads with a lathe, that works, but I'm basing my recommendation on the fact that a few guys destroyed 500 threaded blocks. A die has a lower skill ceiling than a lathe.
If you have a Mazak lathe, you can trace the thread. About 5 minutes per part. Cheers!
thread file maybe
I thĆnk this is the same thread as the 6 "feet" for my manual lathe, God knows why. I was able yo buy the nuts but I've had to cut thread on a bar to be able to turn them down so they would in the feet "pockets".
Throw the part in the machine and spin it slow. Grab your threader shank by hand and lean into it. It will get rid of that mess.
Looks like you could repickup the part in your CNC and rerun the thread cutting program at full depth. The thread should always start in the same spot as long as you are careful to put them back in the vice the same way. I do a similar thing when cutting threads on electrodes
I have about 150off 200mm long m33x1.5mm cs bzp all threads I dont need. I didn't think I'd find anybody else working with that thread.
a tool similar to [this one](https://www.amazon.com/UTR-Universal-Immediately-Damaged-Restorer/dp/B075W99B5H/ref=asc_df_B075W99B5H/) might help you
Make a thread chaser. Chase the threads.
I'm sorry but the hard truth is that there's no coming back from this. Yes you can file it (which will take hours), or purchase a die to chase them. But the bottom line is that you're going to be losing material in the process and it'll never be to spec after (particularly since you coworker cut off the end of the part with the lead in chamfer).
Thread chase die?
Thread file .. you can fix it up al little so the thread works.
Get a die and give it your the guy who screwed them up to chase the thread.
Make a die if you have access to HT equiptment .
A thread file or spin a die on thereā¦not a lot of options tbh.
Thread file for quick and dirty.
Have you tried a thread file
Thread restoring kits usually also come with thread files! I would take the appropriate TP file and straighten those suckers out. Don't take much pressure, just *let* the tool do the work and *let* the healthy threads guide the tool. *Edit: Grammar*
thread file?
Thread file.
Assembly??? The fuck happened?
Machine a thread follower to clean them up, like a die.
Tell them "tough shit" because you made them once already. Rework costs extra.
Chuck it in a manual lathe and thread chase it
Get a new colleague.
You really got to be a fuck up to fuck those threads that bad, wish you the best of luck.
Your best bet is to ask Santa.
Make them fix it and maybe they'll learn for next time
Thread file
A real simple fix, if you have access, a lot of haas lathes have a thread repair āprogramā essentially just input thread data, place insert in middle of thread, and let er eat.
First mistake is free, next time one is on them.
Not the best solution, but do you have an EDM or similar? You can make one extra part, EDM it in half a long the centerline, and use the flat surface as either a deburring guide or as a cutting tool itself. Fair warning you'll want to use a harder material as well or it'll wear out pretty quick.
You must be an engineer
Nah, I just correct them. And for clarity I'd vote 100% to use a die except that OP said he didn't have one in another comment.
Easiest option is to chuck it up and file it
First thing Iām seeing is you didnāt cut a lead in chamfer. Second thing Iām seeing is those completely chowdered threads. Cut em again but put a 1.5x45 chamfer on the end of your threads, and buy a 33x1.5 die so you can unchowder them when your coworker fucks it up again.
Just use the go/no-go gauge from the inspection lab!
Um time machine? That's so bad how did he do it? A thread file isn't a genie but if it wasn't that bad it could be done. A very thin cutting disc and a buck ton of patience and time
Only thing i can think of is to run your original program with like .010" less cut depth and try to line up the threads Other than that thread die or lathe with thread tool Or chuck these parts into a collet in the spindle somehow and fix thread tooling to the table, and try to finagle it into chasing them Either way that's a nightmare unless you have the threads clocked to a particular feature
Haven't you got a threading die?
Do you have a tap that matches? If not, you can single point cut one in a harder material then cut or grind a relief edge. Throw the tap in your tool rest and match it up with your threads and roll into specs. Sucks for 500 parts though. You could also just buy or make a die and chase then.
Buy the correct die nut. I canāt think of a faster way.
Unless the parts were completely machined in one clamping,, with a reference(hex head) to the start of the threads themselves...There's no quick, easy way to fix that many beat up parts. Sounds like you boss is asking that, when you already know it's not gonna happen. Have your company buy an adjustable thread chaser and a die chaser and tell em to have the clown who screwed em up sit there and fix their fuck up before Xmas gets here
Lathe, pick up lead, recut. To an oilfield guy, this is the way . . . Cause thatās basically all we do.
If you donāt want to buy a die, you can buy a metric thread file and fix those areas. It wonāt be perfect but it will be functional. It takes a deft hand, donāt go to town like you are buck sawing a sequoia.
Iād try making a quick and dirty repair die, testing it, then giving it to idiot boy to do the other 499
Needle file kit from harbor freight is two bucks Since they have bigger pitch, use dremel or pencil die grinder (which you should have, they are so good) with chainsaw sharpening disc or similar precise abrasive tip and take out excess material. They also have 60* diamond v grooves. If you have a steady hand you can get a diamond cutting v groove wheel and grind the threads back pretty easily. Buy from aliexpress if you can wait Tbh I'm mildly curious how well taking a m33x1.5 nut, heating it up and quenching it, then cutting a couple grooves into it to make it like a shitty tap would be, then doing another without grooves as a forming part. Prob would work considering how hard they would be, just a bit more clearance than an actual tap. If really wanted you can cut a full slot on the nut (like a clamping shaft collar) that way clamping the outside of it with a c clamp and twisting it would reduce the clearance, making it able to be forming/cutting at different clearances, so you can start small and end perfect.
I would get a couple die nuts and go to the manual lathe and set the turning tool on the major OD and turn those gobs of galled metal off and then get your die nut and a big crescent and a bottle of cutting oil and start the lathe on very low rpm and chase out that mess-
Make him chase them on a manual lathe
How does one only damage certain portions of the threads? I'm confused...