Member
Lathe Bearing Adjustment
I have an 1980's MacMillan metal lathe and was wondering how to adjust the taper bearings. at the back and the front of the headstock there are two large flanges held on by 4 allen head bolts. the exterior of the flanges has car bog around it due to the fact that these flanges have never been taken off. Can someone please tell me how to go about getting to the bearings and how to adjust them
Senior Member
Car bog? Please enlighten me.
Why do you think the bearings need to be adjusted?
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Senior Member
When I was a kid, car bog = bondo
Senior Member
if your lathe has tapered roller bearings it probably has two "km" nuts on the back of the spindle. thats how you adjust the preload.
Last edited by dian; 02-27-2012 at 09:53 AM.
Member
What are mk nuts? lathe has to much vibration for my likeing, hence tighten bearings
Senior Member
Post a picture of your spindle rear end.
Where are you located? Your profile isn't complete...
Senior Member
Bryce, did you notice that you are the ONLY one so far without a location? Maybe you should list one and we might be able to figure out what "car bog" is. OR you could tell us.
Senior Member
The "bog " is possibly a filler to smoothe out the rough finish in the casting, as for the vibration ,not always the spindle , have you checked the motor bearings , is it a single phase or three phase , are the belts tight or stretched and whipping .Originally Posted by tdmidget
Is the vibration there for all speeds , is the lathe firmly anchored or levelled so that it doesnt vibrate on the floor.
Lots of possibles .
Michael
Senior Member
km 4 nut:
(sorry for the typo)
Member
mike4 is correct about the bog. sorry i dont have any picturesMy lathe is level and the belts are tight. The lathe hasnt had much use so it shouldnt be the motor. im purely trying to eliminate things that could be causing the vibration. How do you adjust the nuts and how tightly should you do it up to ensure the bearings are tight?
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