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Control Sheave Bearing

Posted: Sun May 04, 2008 6:19 pm
by backhertz
Today I finished pressing out all the bearings of my three headstocks. I was on a roll after realizing I suffered a short misplacement of my head in thinking there was a carefully cut spacer on the two bearing quill.

So after separating the quill, I moved onto the control sheave. Of all the bearings I had pulled, the control sheave bearing seamed to be the driest. The control sheave bearing was simply pushed in & then hit with a pin punch either 7-8 times on the end on my older sheaves or 4 times on the side of the newer ones.

I found the bearing easily pushed out. Next I squeezed the ends of the piece which was in the center of the bearing & pushed that out. All in all a simple process. I'm not sure then why the control sheaves are considered non-reparable, unless it is because of the uniqueness of the swivel.

I'm going to order some 637Z or equivalent bearings and see what happens.

Control Sheave Bearing

Posted: Mon May 05, 2008 12:31 pm
by billmayo
The control sheave bearing is a Fafnir 35KDD 5mm ID, 19mm OD and 6mm width. I buy them from http://www.ebatmus.com

The 627Z is for the bandsaw auto-track roller bearings (2) and has been suggested as a replacement for the upper and lower blade guide roller bearings.

Bill Mayo

Posted: Mon May 05, 2008 9:20 pm
by backhertz
lol, I received a quote this afternoon from E.B. Atmus for the control sheave bearing made by Fafnir.

Posted: Mon May 05, 2008 11:18 pm
by ldh
backhertz wrote:lol, I received a quote this afternoon from E.B. Atmus for the control sheave bearing made by Fafnir.
So what was the quote?

Part Number Manufacturer Description Price
35KDD THE TORRINGTON COMPANY BALL BEARING 5X19X6MM 6.71

LDH