cwtoyota
Cast Iron
- Joined
- Feb 11, 2010
- Location
- Washington State
I picked up this lathe for a low price knowing it was a "pig in a poke". It needs a spindle rebuild.
I will be performing the work myself, but I need to find out a couple of bearing numbers in order to proceed.
I have the spindle out and disassembled on the bench. The tapers and bearing surfaces look good. There's a little discoloration at the working end of the spindle due to heat from the doomed bearings, but nothing seized or spun.
Only two of the four bearings were still in there and all of the seals were gone. I assume someone previously thought they would fix the spindle and when faced with the cost and complexity of the job they decided it wasn't worth it for an old machine.
The two bearings I do have are the NN3016K CC1P5 at the far end of the spindle and the big NN3020 CC9P4 (missing some rollers) at the business end.
I've done some reading of other posts here and determined that I will need to know the correct contact angle and pre-load to choose the correct 7020 P4 bearings as a set. Any input on this is appreciated.
I don't know if the seals are Mazak proprietary parts, or if I can get them through SKF, etc. If anyone can help me with seal numbers that would be great too.
Also, isn't it nice of Mazak to drill and tap holes in everything for push-bolts. Everything comes out nice and smooth without pullers, presses, heat or drifts and hammers.
I will be performing the work myself, but I need to find out a couple of bearing numbers in order to proceed.
I have the spindle out and disassembled on the bench. The tapers and bearing surfaces look good. There's a little discoloration at the working end of the spindle due to heat from the doomed bearings, but nothing seized or spun.
Only two of the four bearings were still in there and all of the seals were gone. I assume someone previously thought they would fix the spindle and when faced with the cost and complexity of the job they decided it wasn't worth it for an old machine.
The two bearings I do have are the NN3016K CC1P5 at the far end of the spindle and the big NN3020 CC9P4 (missing some rollers) at the business end.
I've done some reading of other posts here and determined that I will need to know the correct contact angle and pre-load to choose the correct 7020 P4 bearings as a set. Any input on this is appreciated.
I don't know if the seals are Mazak proprietary parts, or if I can get them through SKF, etc. If anyone can help me with seal numbers that would be great too.
Also, isn't it nice of Mazak to drill and tap holes in everything for push-bolts. Everything comes out nice and smooth without pullers, presses, heat or drifts and hammers.