I have been working on my 9C for a wee while since I went to swap out the failing leather belt for a ribbed belt.
I have cleaned up the cast iron bearings and had the spindle cleaned.
Completely stripped the machine and cleaned it.
Fitted new felts.
Bought the correct oil.
Levelled the bed as best I can.
Fitted the thrust bearing at the back of the spindle
I have reassembled it and am having trouble setting my spindle clearances.
Info I have found states .001-.0015 for my model which converts to .0254mm-.0381mm
I am having trouble getting my gap big enough.
I let all bearing clamps go and slacken off the spindle back bearing
I have the back close (I work in metrics) and have been getting it to .020mm and at the chuck end I am just managing to get .017mm.
I am having to force the gap, open to fit shims in
But when I get this I can grab the chuck end and hear and feel vertical and horizontal movement and unless I have the drive belt very tight or lose I get what sounds like bearing chatter from the chuck end bearing.
This chatter sound also happens when the lathe is turned on but is less when run in reverse.
Only the spindle is engaged.
Before I stripped it down the back bearing was always done up tight but the front one when tightened would clamp down on the spindle and not allow movement so I backed it off till it spun freely.
This is an old lathe that dates from the 1940s so it will have its own way of doing things and maybe it has been run for many years without the spindle being setup correctly, maybe the bearings are out of round but everything spins true on the dti.
I didnt mic the bearings to check if round as it never crossed my mind.
I am a bit in the dark as to how to proceed and am asking the experts on this forum so please suggest away as I really like my old girl and want to get running properly again.
Thanks
Adrian
I have cleaned up the cast iron bearings and had the spindle cleaned.
Completely stripped the machine and cleaned it.
Fitted new felts.
Bought the correct oil.
Levelled the bed as best I can.
Fitted the thrust bearing at the back of the spindle
I have reassembled it and am having trouble setting my spindle clearances.
Info I have found states .001-.0015 for my model which converts to .0254mm-.0381mm
I am having trouble getting my gap big enough.
I let all bearing clamps go and slacken off the spindle back bearing
I have the back close (I work in metrics) and have been getting it to .020mm and at the chuck end I am just managing to get .017mm.
I am having to force the gap, open to fit shims in
But when I get this I can grab the chuck end and hear and feel vertical and horizontal movement and unless I have the drive belt very tight or lose I get what sounds like bearing chatter from the chuck end bearing.
This chatter sound also happens when the lathe is turned on but is less when run in reverse.
Only the spindle is engaged.
Before I stripped it down the back bearing was always done up tight but the front one when tightened would clamp down on the spindle and not allow movement so I backed it off till it spun freely.
This is an old lathe that dates from the 1940s so it will have its own way of doing things and maybe it has been run for many years without the spindle being setup correctly, maybe the bearings are out of round but everything spins true on the dti.
I didnt mic the bearings to check if round as it never crossed my mind.
I am a bit in the dark as to how to proceed and am asking the experts on this forum so please suggest away as I really like my old girl and want to get running properly again.
Thanks
Adrian