| The Breakroom > The Water Cooler |
| Thanks to.... |
| << < (3/3) |
| John Swift:
Hi John, I've fitted taper bearings to my CL300M lathe a while ago I fell into the trap of removing the old bearings before the new ones arrived ! had to re assemble the spindle to make new spacers , as the taper roller bearings are about 1.25 mm wider ! if my lathe is a typical example , the original bearings are too tight a fit on the spindle ( bearings are not as tight a fit on BSA automatic capstan machines) the spindle needs to be able to pull through the inner of the left hand bearing as you tighten the spindle nut working without any instructions , I first tightend the spindle nut by hand ,then an extra 1/8 turn with a spanner started with the spindle at 500 RPM and at 10 minute increments or so ,increased the speed by 500 RPM checking all the time the bearings are only warm and never hot to the touch after an hour or so at full speed , rechecked the pre load , and tightend the nuts about 1/16 of a turn changing the bearings and gibs (from ARC) has made it possible for me to part off without breaking the tool John |
| John Rudd:
John, Thanks for pointing that out about spacers and things.... I have another lathe to use if I need to make/adjust spacers :dremel: ( a Chester 9*20 ) I managed to remove the remaining bearing ( the bearing just behind the spindle flange) tonight, after making a suitable puller from some 3/16 plate and 8mm studding..Surprising how easy the bearing came off... New bearings should be here tomorrow (post willing :clap: ) then I can start to re-assemble.. |
| John Swift:
Hi John , I forgot to add to the previous post while my lathe is a 11 year old C2 lathe , and your new lathe could be a little different the outer part of the roller bearing is the same thickness as the original bearing ,but the inner part doesn't go all the way through and is offset by 1.25mm and projects outward I had to trim the inside of the plastic bearing covers to ensure it didn't clamp down onto the cage with the rollers John |
| John Rudd:
John, Thanks for the pointers, I'll certainly watch out for anything that might catch me unawares.. I must have been fortunate when I changed the bearings on my mini mill.. Didnt have to change anything.. :clap: |
| Navigation |
| Message Index |
| Previous page |