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MMD > Archives > November 2015 > 2015.11.14 > 06Prev  Next

Material for Standard Valve Guides
By John Wolbach

I do not believe this is a paper phenolic laminate.  I believe that
the material used in both the original and PPCo replacement valve
guides was "vulcanized fiber".  This material is still used to make
"fiber" washers.  A thinner version, gray in color, used for electrical
insulation is commonly known as "fish paper".

The material is less brittle than paper phenolic laminates, and
I believe that it is easier to punch.  Here's a link with more

A little Internet research turned up several sources for vulcanized
fiber sheets including 0.031", 0.047" and 0.062" thicknesses.

Best regards,
John Wolbach

(Message sent Sat 14 Nov 2015, 22:59:15 GMT, from time zone GMT-0500.)

Key Words in Subject:  Guides, Material, Standard, Valve

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