Bearing replacment help

[rizaydog]

I have a grizzly G5979 wood lathe. Well, I did a lot of modifications to it, so it really isn't a grizzly anymore. But the inner workings of the headstock are the same.

I have had this lathe for 8-9 years and plan to replace the spindle, bearings, and pulley. My question is, how to I get the bearings and spindle out of this thing? Is it pressed in?

Also, since I am at it, I want to replace the reeves drive pulley with a fixed, standard pulley. I removed the motor and added a 2 horse 220v and VFD a while back and don't need the reeves for speed control anymore. And it makes a lot of noise. The spindle is a 1x8, but I am concerned that a 1" id pulley might not fit. This lathe has a "1 inch" tool rest post that is actually metric and so a 1" tool rest won't fit in the banjo. Any thoughts on where I might find a 3-4" pulley that might work??

Any help is greatly appreciated.

Ray

 

[Chthulhu]

Looking at the diagram in the machine's manual, it looks like the retaining ring for the spindle pulley comes off, then the pulley, a long key, a bearing, and the speed shifter plus its spring. Then the spindle should press out the other side of the headstock, leaving a bearing on either side of the headstock if the righthand one doesn't come out with the spindle.

 

[Wildman]

http://grizzly.com/images/manuals/g5979_m.pdf

Looks like you start from the back by removing
#34 back cover
#15 locking ring
#12 spindle pulley set R&L
#10 bearing
17A locking nut
7A bearing
#8 spring

Looks like spindle will come out from front, cannot tell if can gently tap out or need a puller. What has me confused is removing #5 Key & 6A bearing. Would think # 12 spindle pulley sits on #5 key too, and 6A would not from looking drawing.

I would email Grizzly for instructions.

If there is a machinist or electrical store store in your area, should have a pulley catalog if nothing on hand. Would take both spindle & motor with you when shop.

 

[randyrls]

The spindle is a 1x8, but I am concerned that a 1" id pulley might not fit. This lathe has a "1 inch" tool rest post that is actually metric and so a 1" tool rest won't fit in the banjo. Any thoughts on where I might find a 3-4" pulley that might work??

Ray; Check out Surplus Center at https://www.surpluscenter.com/sort.asp?catname=powerTrans&keyword=PPP1

They are surplus, so don't always have the same items all the time. In particular, verify whether the shaft is imperial or metric and check the key way size.

 

[rizaydog]

Thanks for all the replies guys. I'll take it apart and double check the measurements before I get too carried away. I will definitely contact grizzly for instructions. Thanks for the surplus center link. I forgot about those guys. I bought some stuff from them for my vacuum chuck a while ago. I'll have to give them a look.

Thanks again