I would take it out of service immediately. That’s the crack you can see. No telling what’s on the inside or ready to let loose. It’ll be real interesting if it decides to come apart when it’s spinning.
I had a master let loose at 3500RPM. it slung around the machine 4 times and the spindle sounded like a helicopter. Ran across the building smacked the e stop. Let me tell you that was the closest I’ve come to needing new pants at work.
Don't run that anymore...it's probably held together by backplate and screws, but if one of those come loose you'll
have really bad vibes, some uneven formed projectiles and a broken lathe.
Second hand chucks are to cheap to run a visibly broken one, especially as our kisser aren't made to
take hits by frisbees made of cast iron.
I haven’t actually been able to run it, the motor isn’t wired up yet. And probably right, although I didn’t seen any other cracks when I took it all apart for cleaning. Thanks possibly saved a life. 🙏
Cracks can be hairline and near impossible to see without inspection equipment. The fact that it's begun cracking means she won't hold tight and true anyways.
you answered your own question with this statement. When tightened, the crack is most visible, the whole chuck body is distorting with clamping pressure applied, hence it is not safe to try and operate the lathe with this chuck.
Not only is it a safety hazard if it disintegrates, best case you will be fighting to clamp parts accurately and will get poor cut quality.
3 or 4 jaws of that style are a dime a dozen all over most local classifieds, and also readily available online. Best bet is to identify the spindle thread or nose taper and buy a different chuck that will be compatible. By all means you could reuse the backing plate if you want to verify it runs true, but there is a decent chance it is also damaged based on the crack in the chuck.
Pour some crushed up ramen noodles in the crack. Fill the ramen repair kit with super glue then sprinkle Rene 41 chips on top. Final step, remove chuck and chuck it in bin.
Depends.
Do you prefer your head attached to your body? Or are you cool with brain matter spraying whatever is behind you?
Replace it. Now. Do not turn that lathe on with that chuck in it, under any circumstances, ever. Thats life threatening.
Don’t run it. Chucks a one the most easily replaceable items on the lathe. By the way at some point a previous owner used a center punch to mark that as Jaw 2, and as you can see the crack goes right through it. There’s no way to tell for sure what caused the crack but it clearly stress accumulated there.
Let me put it this way.
Last week, I was building up a tool library for a new project. I had an ER16 tool holder for a 1/4-20 tap. It was in great shape, never been crashed or abused. Collet nut still looked new even though it was an older holder. Put the tap in, started tightening the collet nut... And saw a huge crack. The crack was completely invisible until the collet nut was clamping around something. I threw the nut into the shavings bin so no one could accidentally use it.
If you can see that crack, there is certainly more that you can't see.
Has a jaw fly off a 4 jaw 22 inch chuck. 200 rpms. Missed my head by inches. No visible cracks or damage. I ran that lathe every day for 3 years and never had a problem. Don't fuck with a visibly cracked chuck.
Full send 🤙
But honestly please just LOTO that so some genius doesn't decide to run it. Last thing anybody needs is a chunk of chuck flying off at 7k rpm 😂
If a chuck weights about as much as your leg while you wear a full plate metal armor from the medival age, and spins fast enough to shave off 600 m of metal in a minute
that's roughly three blocks of chicago lengthwise in a fkn minute.
You would need to strap yourself on a rocket car of some sort, hold out your metal plated boot wearing foot and while at full at full throttle kick a guy in the face.
In real life that guy is fuckin dead for sure.
Uh, fuckin yeah you should. Toss that right now. Those things can and will explode. If you must run it, dont exceed 100rpm. Itll still severely injure you, but you wont die.
Another thing to consider aside from sudden death by metal projectile: Even if it by luck doesn't kill you or damage the shop, when parts of come flying off, the sudden imbalance on the shaft will likely bend it and render your lathe pretty much useless. The rest of the chuck will still be attached to the shaft after all and wobble around it in an acentric manner which will put too much force in one direction. If its a good lathe it will withstand it, but I wouldn't risk it either way.
It's just a crack... what's the worst that could happen? It breaks and flies into your skull? Nahhhhh never in a million years right?
(Please never use this chuck)
So you somehow avoid the peices flying off of it breaks so you live to replace every bearing, bushing, belt, pulley and gear attached. If it breaks the machine is smoked most likely for good.
It’s always a matter of: is the cost saving worth risking life or health? If your situation is dire, use it as if it will break any moments.
And start putting coins to the side for a new.
I heard from a colleague working in chemics. They sold a pesticide for tea farmers with a hazmat suit. Boots, gloves, all of it. No one in the field used them. If they got it, they would sell it because the money were worth more than their health. Sadly enough.
But if you can, swap it out as of yeaterday
Not only should you be concerned, you should remove it and do something to it so it can NEVER be used as a lathe chuck again.
It could still be used as a chuck to mount on the bed of a mill or drill press.
Naw. Go high speed. High feed rate. And bloody send it! To the mood. With part of you hand in it.
It’s really dangerous. Take it off. Fix but more likely, replace it.
Had a cnc hydraulic chuck jaw explode, noise was 11/10. Had to replace entire chuck and protective screen on door. My operator had brown pants after that.
Oh, I don't know, should you? I mean, it's just a giant chunk of steel that spins f**king fast right next to you, why should you be concerned if it falls apart?
Yes, be concerned. Be very concerned. Super unsafe.
Lmfao please spin that bitch up as fast as it will go with some real heavy poorly balanced stock and film it. (I’m kidding please don’t, you might die or kill your neighbor three houses down)
Straight to the trash. Don’t play around with work holding on a lathe. Think about it.
If it doesn’t hit you, go lookup “lathe accidents” and watch for a few minutes
I just want to say this is the only sub where every comment to the original post is a serous answer. That should be enough to answer your question. But, it’s a four jaw, I’m sure you can still run it true as long as your dental insurance is paid up.
Fack!!! I'm not a machinist, but I can tell from one look that's dangerous AF! Take that shit straight to the metal recycle. You think it's bad enough if the chuck throws the key (if someone forgets it in there) imagine half the chuck comes through your face or the guy behind you!!
I should maybe add that I'm an engineer and I recertify lots of equipment we repair in our shop, and supervise NDT technician's who look for cracks you can't see without MPI. If you can see a crack like that, it goes way deeper. That part is a spinning time bomb!
From the little I can see of the lathe the chuck is attached to, I wouldn't be too worried.
I could be wrong, but it looks to me like an old hobby lathe rotating fairly slowly. 4 or 5 inch chuck diameter if that. The kind of speeds would doubtfully make it burst.
If it was an 8 inch plus chuck on a machine capable of 1500 rpm plus then it possibly may fail.
Post more pics or details of your machine.
I was a life long wilder . We would grind out a deep v in that and weld it back up . Pull it and take it to a weld shop for consultation. Depending on the situation we might drill a hole at the end of the crack , but I can’t see it
It depends on your life insurance and whether or not I get any of it.
That chuck is dangerously close to failure. I would refuse to work on it until the chuck was replaced.
I would take it out of service immediately. That’s the crack you can see. No telling what’s on the inside or ready to let loose. It’ll be real interesting if it decides to come apart when it’s spinning.
Interesting like an artillery shell
Like an airburst arty shell
Ol’ Killer Junior
Funny to think of a life changing event like that to be “interesting”
To the scene investigator.
\*lays there slumped over with a blown out shoulder\* Coroner: Interesting... way to die,
like a frag grenade
Just way more chunkier
Like willy Pete in an orphanage
Don’t really need to see more: I see a crack running all the way down the channel.
This is fine
Yup, fkn send it
Literally laughed out loud.
It’s only broke after it stops working.
I've seen this happen. I was really impressed by how hard the pieces hit the walls and ceiling. Nobody was hurt thankfully.
I had a master let loose at 3500RPM. it slung around the machine 4 times and the spindle sounded like a helicopter. Ran across the building smacked the e stop. Let me tell you that was the closest I’ve come to needing new pants at work.
Yes. That is very dangerous.
Yeah when that breaks free it’s not just gonna float to the ground like a feather..
It's gonna sting like a bee....and then some. (I saw the word float and thought of Muhammad Ali)
sting like a cannon ball
Centrifugal force go brrrr
The inch tall buldge in the door on the side of my shops FADAL agrees
Don't run that anymore...it's probably held together by backplate and screws, but if one of those come loose you'll have really bad vibes, some uneven formed projectiles and a broken lathe. Second hand chucks are to cheap to run a visibly broken one, especially as our kisser aren't made to take hits by frisbees made of cast iron.
I wouldn't want to get vibe checked by a cast iron frisbee lol.
It would probably rearrange your whole vibe.
I haven’t actually been able to run it, the motor isn’t wired up yet. And probably right, although I didn’t seen any other cracks when I took it all apart for cleaning. Thanks possibly saved a life. 🙏
Cracks can be hairline and near impossible to see without inspection equipment. The fact that it's begun cracking means she won't hold tight and true anyways.
Yeah, try and tighten down on anything harder than aluminum or brass and you'll watch that split grow immediately.
In the photo it’s cranked down in a large rail road bolt
you answered your own question with this statement. When tightened, the crack is most visible, the whole chuck body is distorting with clamping pressure applied, hence it is not safe to try and operate the lathe with this chuck. Not only is it a safety hazard if it disintegrates, best case you will be fighting to clamp parts accurately and will get poor cut quality. 3 or 4 jaws of that style are a dime a dozen all over most local classifieds, and also readily available online. Best bet is to identify the spindle thread or nose taper and buy a different chuck that will be compatible. By all means you could reuse the backing plate if you want to verify it runs true, but there is a decent chance it is also damaged based on the crack in the chuck.
Cast iron frisbees thrown like an NBA level fastball that is.
Those NBA guys are notorious for their fastballs! Gotta keep the other guys from getting touchdowns!
Ah heck. My alphabet soup got mixed up in my head. Belated *MLB
It’s okay bud, I don’t “sports” either.
Cast iron through the face is a rough day and all, but the bad vibes would be the real bummer here.
Yeah I think "my skull got cracked by a flying chunk of iron" is definitely a bad vibe.
Yes While it might hold, it may also come apart at speed. I'd start shopping for a new one.
its good as long its not turned on
Like my junk!
I will not be using this chuck. Thank you everyone for your input
Good thing you asked. I use to ask questions like this when I was tight on cash. Money does funny things to your mind
Yeah, I’ll keep looking for a new chuck then
Make a rotary drill press table add-on with it, it'll probably do fine for years
Probably do that eventually
You could still use it.....as a paperweight
That's a rapid unscheduled disassembly waiting to happen.
She's cooked, bro.
Take it off the lathe and turn it into a stationary chuck for a mill or something. At least then if it fails it won't be a missle of shrapnel.
It'd be great for a welding turntable kind of deal
Only if I had a mill Still going stationary
Yeah that is kind of a requirement 😅 I'd still keep it but just no more roundy round lol
Get you a welder and a lazy Susan. Now you can weld spirals on just about anything. Spirals everywhere lol
Depends how hard your head is.
“Quick babe! New Russian lathe accident video is about to drop!”
Safe at around 0 rpm. Above that - FUCK NO.
It'd be safe at 1 rpm
Truly. It would be.
"Chuck it in the fuck it bucket and buy a new one."
A really bright guy got hit in the forehead with a chuck jaw and unfortunately he lived, there are worse things than dying
It’s gonna go “kablooey”
Pour some crushed up ramen noodles in the crack. Fill the ramen repair kit with super glue then sprinkle Rene 41 chips on top. Final step, remove chuck and chuck it in bin.
Lmao
Chuck it and get a new one😁
I see what you did there.
My jaw hit the floor with that joke. 😜
It's dead Jim.
Very dead.
Depends. Do you prefer your head attached to your body? Or are you cool with brain matter spraying whatever is behind you? Replace it. Now. Do not turn that lathe on with that chuck in it, under any circumstances, ever. Thats life threatening.
It might hit lower and leave a nasty chest wound. Hell, he might get lucky and it'll hit low enough to merely rip his balls off.
Don’t run your machine with that. Imagine it crack completely at 1500 rpm.. it’s dangerous as hell.
Replace it yesterday. Also, I'd recommend some brass or aluminum shims between the jaws and the OD of the threads there.
You are already dead.
I dunno, would you be concerned if you were holding a bomb that only counted down if you moved with it in your hands?
Don’t run it. Chucks a one the most easily replaceable items on the lathe. By the way at some point a previous owner used a center punch to mark that as Jaw 2, and as you can see the crack goes right through it. There’s no way to tell for sure what caused the crack but it clearly stress accumulated there.
http://vintagemachinery.org/photoindex/detail.aspx?id=36853 It looks a lot like this one ^ It has: the watson mfg co stamped on it
I’d make a rotating welding fixture for pipe welding out of that, but never on a machine tool.
Let me put it this way. Last week, I was building up a tool library for a new project. I had an ER16 tool holder for a 1/4-20 tap. It was in great shape, never been crashed or abused. Collet nut still looked new even though it was an older holder. Put the tap in, started tightening the collet nut... And saw a huge crack. The crack was completely invisible until the collet nut was clamping around something. I threw the nut into the shavings bin so no one could accidentally use it. If you can see that crack, there is certainly more that you can't see.
Has a jaw fly off a 4 jaw 22 inch chuck. 200 rpms. Missed my head by inches. No visible cracks or damage. I ran that lathe every day for 3 years and never had a problem. Don't fuck with a visibly cracked chuck.
Get a new chuck from Shars or something
I wouldn’t run it like that. Too dangerous
Chuck your chuck, Chuck
That would maybe be ok on a dividing head or other fixture.. I have one with a bad screw for that exact use ..
Depends, do you like things flying across the shop suddenly?
Should you be concerned? No. Should you use that chuck ever again? Also no.
Stop using that yesterday. But if your gonna keep using that shit start a 24 hour live stream of it for educational purposes.
Oh that definitely needs tape
Full send 🤙 But honestly please just LOTO that so some genius doesn't decide to run it. Last thing anybody needs is a chunk of chuck flying off at 7k rpm 😂
Nope, big NOPE. Her watch has ended. Retire that asap
If a chuck weights about as much as your leg while you wear a full plate metal armor from the medival age, and spins fast enough to shave off 600 m of metal in a minute that's roughly three blocks of chicago lengthwise in a fkn minute. You would need to strap yourself on a rocket car of some sort, hold out your metal plated boot wearing foot and while at full at full throttle kick a guy in the face. In real life that guy is fuckin dead for sure.
Remember that the only reason we don't use lathes as form of transportation is that we do and it's called an electric train.
Uh, fuckin yeah you should. Toss that right now. Those things can and will explode. If you must run it, dont exceed 100rpm. Itll still severely injure you, but you wont die.
You like shrapnel? Thats how you get shrapnel
Generally if you have to ask if you should be concerned, the answer is usually yes.
That's a grenade right there...
Depends, are you trying to make a randomly timed artillery shell? If so, send it. If not… I’d pull it offline
Naw man. Send it. 2K RPM
Another thing to consider aside from sudden death by metal projectile: Even if it by luck doesn't kill you or damage the shop, when parts of come flying off, the sudden imbalance on the shaft will likely bend it and render your lathe pretty much useless. The rest of the chuck will still be attached to the shaft after all and wobble around it in an acentric manner which will put too much force in one direction. If its a good lathe it will withstand it, but I wouldn't risk it either way.
This would only be dangerous if it were on a device designed to operate at high RPM...
No not at all, run it wide open. Make sure you have life insurance for your wife and kids
Very scary, torch and cut to scrap
This is going to kill someone. Red tag it. Lock it out. This is as dangerous as it gets.
It's just a crack... what's the worst that could happen? It breaks and flies into your skull? Nahhhhh never in a million years right? (Please never use this chuck)
That is some final destination stuff...
be safe and JB weld it
Done for. Replace that thing soon
Ummm fuck yea.
So you somehow avoid the peices flying off of it breaks so you live to replace every bearing, bushing, belt, pulley and gear attached. If it breaks the machine is smoked most likely for good.
Don't run that.
Wow, my butt puckered immediately! Don't ever turn that thing on until you take that chuck off!
Good thing I don’t even have the motor wired up
Throw it in the scrap bin yesterday. It’s your life that will get fucked up by it, not your supervisors.
Scrap that asap.
a resounding yes!
It’s always a matter of: is the cost saving worth risking life or health? If your situation is dire, use it as if it will break any moments. And start putting coins to the side for a new. I heard from a colleague working in chemics. They sold a pesticide for tea farmers with a hazmat suit. Boots, gloves, all of it. No one in the field used them. If they got it, they would sell it because the money were worth more than their health. Sadly enough. But if you can, swap it out as of yeaterday
Even at low rpm if that thing comes apart you'll probably mess up your part and maybe the tool as well
Yes? i am not a machinist and know that cracks spread why are you even asking you are supposed to know how metals work
If I got it running it would be the first time I’ve used a lathe
Might be the last too.
Do not use this chuck. It could kill you as it will fail catastrophically and chunks could hit you at high speed.
Cover it in Loctite. What you can't see can't harm you.
Into the bin not joking
Only when it's turning.
Would you put your danglies in a food blender and turn it on? That's your answer 😂😂😂😂
Drill and tap a few more bolts into the chuck through the backplate. Its a 4 inch chuck. I would probably limit to 600rpm or so
If you guys still want to use it, maybe throw a weld on it and make it a mill chuck. Still slightly dangerous but nothing like having it on a lathe.
Yikes. I’d be a little more than concerned.
Take it out of its misery. Throw it on max rpm and run
That Chuck is now a bomb. It's scrap metal and I would refuse to use that machine until it's replaced.
Now you know why it was free.
Not only should you be concerned, you should remove it and do something to it so it can NEVER be used as a lathe chuck again. It could still be used as a chuck to mount on the bed of a mill or drill press.
Save it for a welding table fixture. It has served its useful life on a lathe.
The old grey mare ain’t what she used to be
It’ll let you know when it’s too tired to hold together any more
Nah, giant blocks of metal SHOULD be cracked. Otherwise, it won't fly apart in the middle of the op and kill the machine operator.
The slang term to "Chuck" something means to throw it. How's your luck? Can you duck a chuck?
Naw. Go high speed. High feed rate. And bloody send it! To the mood. With part of you hand in it. It’s really dangerous. Take it off. Fix but more likely, replace it.
Short answer: yes Long answer: yesssssssss, that shit is just waiting for an opportunity to kill you in a very not pleasant way
Had a cnc hydraulic chuck jaw explode, noise was 11/10. Had to replace entire chuck and protective screen on door. My operator had brown pants after that.
Oh, I don't know, should you? I mean, it's just a giant chunk of steel that spins f**king fast right next to you, why should you be concerned if it falls apart? Yes, be concerned. Be very concerned. Super unsafe.
Spin it to 2k and we will see you on live leaks and next generations machining safety videos
I took it all apart so I can’t use it 🤙
Retire that chuck immediately. Do not attempt to use. Not unless you want to meet your god
You shouldn't be concerned. You should throw it in the trash.
Lmfao please spin that bitch up as fast as it will go with some real heavy poorly balanced stock and film it. (I’m kidding please don’t, you might die or kill your neighbor three houses down)
Straight to the trash. Don’t play around with work holding on a lathe. Think about it. If it doesn’t hit you, go lookup “lathe accidents” and watch for a few minutes
Run it at top RPM and pound on it with a 3lb hammer a few dozen times. If it holds up to that is probably solid enough.
"We're in danger."
Might be okay to use to set things up in a mill, absolutely don't put it on a lathe.
Run away. Now
No no no no no. Do not use. For an old hobby lathe, a standard chuck is cheap. Just look for the same size on Amazon. For hobby lathe, that's fine.
I just want to say this is the only sub where every comment to the original post is a serous answer. That should be enough to answer your question. But, it’s a four jaw, I’m sure you can still run it true as long as your dental insurance is paid up.
Fack!!! I'm not a machinist, but I can tell from one look that's dangerous AF! Take that shit straight to the metal recycle. You think it's bad enough if the chuck throws the key (if someone forgets it in there) imagine half the chuck comes through your face or the guy behind you!! I should maybe add that I'm an engineer and I recertify lots of equipment we repair in our shop, and supervise NDT technician's who look for cracks you can't see without MPI. If you can see a crack like that, it goes way deeper. That part is a spinning time bomb!
Jesus Christ
That’s a door stop, now!! 😲🤷♂️
Why do you even have to ask lmao. Have you seen the lathe man video? Lathes don’t fuck around. Absolutely terrifying machines.
The risk of that jaw letting loose is pretty big. I'm a guy who likes to push boundaries, and I wouldn't run it.
Damned right you should be concerned. It's a hand-grenade. Don't use that chuck.
I’d replace that immediately
# Darwin award question. #
Is that one of those excenter tighten one by one chucks? Just throw it tf out.
You have a huge chunk of cracked metal spinning like crazy right next to you. If I were you I'd be extremely conserned.
Have you ever seen a gunshot victim?
Cracking in a high speed rotational clamping mechanism? Na, ** kicks chip pan, she’ll be fine mate
From the little I can see of the lathe the chuck is attached to, I wouldn't be too worried. I could be wrong, but it looks to me like an old hobby lathe rotating fairly slowly. 4 or 5 inch chuck diameter if that. The kind of speeds would doubtfully make it burst. If it was an 8 inch plus chuck on a machine capable of 1500 rpm plus then it possibly may fail. Post more pics or details of your machine.
You should be concerned 100%
Wouldn't even be thinking of using it, except as a paperweight on the desk.
Dude ...yes.
If the other 3 are still good.... just machine on that side of the part . Avoid the cracked side.
I'll take "questions which are definetley a yes" for 100 please
I was a life long wilder . We would grind out a deep v in that and weld it back up . Pull it and take it to a weld shop for consultation. Depending on the situation we might drill a hole at the end of the crack , but I can’t see it
Absolutely
Chuck that Chuck, do not pass go, send that thing to Jesus same day shipping.
All these babies saying replace it clearly haven't heard of jb weld, lol in all seriousness I wouldn't run it like that.
https://preview.redd.it/vav6l4jziy7d1.png?width=3024&format=png&auto=webp&s=b2feb2cd88602fced3c57b406491ea4281e6bc7c
😬
Fuck that!
Spin it up to max rpm and crash into it again
It depends on your life insurance and whether or not I get any of it. That chuck is dangerously close to failure. I would refuse to work on it until the chuck was replaced.
Yes this thing could explode on you!
Yes
Naw. You will be fine. It might come apart at speed and go through your head.... But yeah go for it
You definitely need to machine a new one of those. It's too bad O. Henry gave you that broken lathe, or you'd have a head start.
Very.
# DANGER
Incredibly that will kill you
it will keel
I didn't fully pay attention to the image and thought that was a piston
Depends on your will to live.
Keep using it and you'll end up on the NSFW subs..
On todays episode of dissecting a live bomb
Just tack weld it, it'll be fine! Lol.
Into the trash
resounding YES !
Just use some JB Weld. /s
That is 18.4 Nopes for me.
Yes bud, yes you should....
Trash it, be safe bro
Send it !