Ball bearings in Jet mini
- Thread starter Ron Mc
- Start date
Signed-In Members Don't See This Ad
- Status
Signed-In Members Don't See This Ad
fshenkin94
Member
I had the same problem. I took it into a local place that services Jet. They are replacing the shaft and bearings for about $100. Worth it to me since I'd proably screw it up myself.
I went through this a year ago and it is no biggie at all.
Undo the set screw in the hand wheel and remove it.Be careful, the is a thin spring washer next to the bearing on that end.
(remeber when reassembling it not to tighten up the hand wheel too tight.)
There may be a nut on the spindle shaft, it's been a while but if there is one it needs to be removed.
Un do the set screw on the drive pulley.Eveything comes out on the tali stock end.Remember the drive pulley is free so don't let it drop when yuo push out the spindle.
Check your spindle when it's out,mine was "scarred" causing a wobble.
IIRC there are two different sized bearing's.
If this is a VS model disregard the abovve instructions, I have never done one of those.[
]
Also if this is the one you won last year remember there is a two year warrantyu.MHW tool group handles JET, they sent me my new bearings in 2 days.
If you have any questions you have my number.
Undo the set screw in the hand wheel and remove it.Be careful, the is a thin spring washer next to the bearing on that end.
(remeber when reassembling it not to tighten up the hand wheel too tight.)
There may be a nut on the spindle shaft, it's been a while but if there is one it needs to be removed.
Un do the set screw on the drive pulley.Eveything comes out on the tali stock end.Remember the drive pulley is free so don't let it drop when yuo push out the spindle.
Check your spindle when it's out,mine was "scarred" causing a wobble.
IIRC there are two different sized bearing's.
If this is a VS model disregard the abovve instructions, I have never done one of those.[
]Also if this is the one you won last year remember there is a two year warrantyu.MHW tool group handles JET, they sent me my new bearings in 2 days.
If you have any questions you have my number.
Randy_
Member
Ron: What did you do about your lathe?? Did you get it fixed or is it still on the TODO list??
M
Mudder
Guest
Caution:
I do not know how tightly the bearings are in the headstock but if you have to do any pressing at all make sure you ONLY press on the outer ring of the bearing to press it into the headstock and you support the inner ring of the bearing as the shaft goes in. If not you can cause what is called " Brinelling" this is where the bearing balls distort the raceways and will cause the bearings to fail quickly. Also: the bearings should have some sort of preload on them to keep them from allowing vibration.
I do not know how tightly the bearings are in the headstock but if you have to do any pressing at all make sure you ONLY press on the outer ring of the bearing to press it into the headstock and you support the inner ring of the bearing as the shaft goes in. If not you can cause what is called " Brinelling" this is where the bearing balls distort the raceways and will cause the bearings to fail quickly. Also: the bearings should have some sort of preload on them to keep them from allowing vibration.
- Status