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9" SM Utilathe Restoration
- Thread starter YYCHM
- Start date
How do you put the spindle in neutral?
I swapped the pulleys and didn't notice any real difference other than high range with max RPM sheave position caused my power bar to trip. I need to swap them again and see if power bar trip still occurs, maybe it had always done that.
Craig
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Daaaaa….. Oh that neutral......LOL
Ok..... swapped the pulleys back and max high range no longer trips my power bar.
As for placing the spindle in neutral...... The vibration is essentially non existent in all speed ranges with the spindle in neutral. So, now we know where the vibration is originating from.
Probably not a good thing to find out
Craig
Ok..... swapped the pulleys back and max high range no longer trips my power bar.
As for placing the spindle in neutral...... The vibration is essentially non existent in all speed ranges with the spindle in neutral. So, now we know where the vibration is originating from.
Probably not a good thing to find out
Craig
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Brent H
Ultra Member
No Craig - it is a good thing. A bad thing is to have the vibration and things disintegrate.
Your lathe uses 3 x 6203 and 1 6203 2RS bearings and then the one Timkin bearing. 12175/12303. You can find them all pretty reasonable.
You could probably change all the bearings for about $125 - I would do the motor as well - you should also run your lathe directly off an outlet and not a power bar to be sure it can draw full start up power etc.
Your lathe uses 3 x 6203 and 1 6203 2RS bearings and then the one Timkin bearing. 12175/12303. You can find them all pretty reasonable.
You could probably change all the bearings for about $125 - I would do the motor as well - you should also run your lathe directly off an outlet and not a power bar to be sure it can draw full start up power etc.
No Craig - it is a good thing. A bad thing is to have the vibration and things disintegrate.
Your lathe uses 3 x 6203 and 1 6203 2RS bearings and then the one Timkin bearing. 12175/12303. You can find them all pretty reasonable.
You could probably change all the bearings for about $125 - I would do the motor as well - you should also run your lathe directly off an outlet and not a power bar to be sure it can draw full start up power etc.
Funny thing here is that Phil, the nice retired English chap who sold me the machine and was desperately trying to convince his wife to move back to England to be closer to their children and thus ditching such things, told me he had recently replaced all the bearings? Nice Guy, and I really believe that he did. The only thing he did mention that was his method of pre-loading the spindle hadn't been all that scientific.
Everything feels tight from the outside and I don't see any significant spindle run out?
Craig
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Brent H
Ultra Member
Ok - that was my next thought. Loosen the set screw on the ring and tighten up the ring until the spindle is a bit stiff. Back off 1/4 to 1/2 turn and check spindle. If it is good to rotate nicely - you are set. Lock the set screw. My lathe was making shite noise and the bearing closest to the nut was the issue.
That nut wasn't on there very tight? What the heck do I use to tighten it down with? All's that's on it is a single hole about 5mm dia and 7.5mm deep.
Craig
Removed the nut and cleaned her up.
And cleaned up the spindle.
Greased the nut and ready to tighten. Just need to figure out what to use to hold it.
Should I be doing with the chuck installed or does it matter?
Craig
I don't think it's missing. Just the image or some grunge I didn't remove. I'll take her off and double check though.
Edit.... I checked, the seal is ok, just some grunge I didn't clean out.
Can I brace the nut and turn the chuck instead?
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Brent H
Ultra Member
You can, shouldn’t be that hard to knock up to tight. - just need everything snug. The bearing is not a tight fit at the back, you could take a dead blow hammer and tap the front and tighten. You are looking at tenths. Push on the front and tap with your dead blow - shouldn’t take much - how loose was the nut?
Tap on the front of what? The nut wasn't loose loose, just easy to back off. Tightening it appears to be a bigger challenge.
I made this up, but man that nut doesn't want to tighten up any more than it is. The spindle feels a little draggy now, but not much.
Tap on the front of what? I want to see if this will go a little tighter yet. A 1/4 turn will loosen it right off?
2"