Powermatic 1150 VS polymer bushings

Eric_Gagnon · Jun 30, 2017

I have an old Powermatic 1150 VS, the ancient green model. I have to replace the oilite infused bronze bushings for the variable speed pulleys and would like to move to polymer bushings. Anyone done this and can point me in the right direction?

Thanks!
Eric

Vince · Jul 1, 2017

McMaster-Carr has some design information in there catalog. I should be able to figure out which nonmetallic bearing is right for your application. There are a lot of options, and I'm sure some will not be as good as bronze, but there should also be some that will work. Though maybe not a price that is cheaper.

Vince

Erich · Jul 1, 2017

Rulon.

Rulon Materials | Self Lubricating Bearings | Rulon LR, J, 641

The engineering guides have details on the tolerances for the bores to get the running clearances you need. A lot of the plastic bearings from McMaster are low tolerance and must be machined after installation to control the fit.

C_Stebbins · Jul 1, 2017

I re-did the identical drill press using oilite bronze.

Some thing to consider, as the belt stretches on these Reaves drive arrangements there is a chance the belt may contact the bearing surface, in the extreme high or low range, when one pulley is fully expanded on the other fully closed.

I saw this first hand my Reaves pullies on my Powermatic 90 wood lathe.A correctly sized belt and proper tension should reduce this issue greatly.

Eric_Gagnon · Jul 1, 2017

Thanks for the direction guys, I'll look into the rulon materials. If anyone comes across specs please let me know!

Eric

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moonlight machine · Jul 1, 2017

Eric_Gagnon said:
Thanks for the direction guys, I'll look into the rulon materials. If anyone comes across specs please let me know!

Eric

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McMaster has specs for Rulon, great stuff but very expensive.

woodgeek · Apr 10, 2023

C_Stebbins said:
I re-did the identical drill press using oilite bronze.

Some thing to consider, as the belt stretches on these Reaves drive arrangements there is a chance the belt may contact the bearing surface, in the extreme high or low range, when one pulley is fully expanded on the other fully closed.

I saw this first hand my Reaves pullies on my Powermatic 90 wood lathe.A correctly sized belt and proper tension should reduce this issue greatly.

I know this is a rather old thread but I'm hoping you're still a member. How did you make the oilite bearings? Are they standard dimensions or did you have to machine them to size?

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Powermatic 1150 VS polymer bushings

Eric_Gagnon

Plastic

Vince

Aluminum

Erich

Hot Rolled

C_Stebbins

Aluminum

Eric_Gagnon

Plastic

moonlight machine

Diamond

woodgeek

Plastic

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