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felt seals


Chris Coon

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It shouldn't be as difficult as it is to find felt grease seals.  Back in the bad old days, there were standard SAE sizes for felt washers, usually made from high-grade F1 white felt or slightly lower grade grey felt.  The National Oil Seal catalog has (or had) them listed by size with numbers starting with 5M, e.g. 5M100.  The problem is that the listings don't give o.d., i.d., and thickness.  There has to be an old table of these somewhere, because all of the car manufacturers chose standard sizes!  Anyone have a table of these?

 

You can buy F1 felt sheet from a number of suppliers and cut your own if you know the finished dimensions.  I have cut some by turning steel, copper,  or aluminum tubes on a lathe to get a knife edge and using a small hydraulic press to punch some out from sheet material.  I tried PVC pipe but it wasn't hard enough to cut the felt.

 

South Shore Bearing in Quincy, Mass. has many old catalogs and a good stock of felt seals and bearings, very helpful staff.

http://southshorebearing.com/

 

felt_seals_press.jpg

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