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MMD > Archives > November 2015 > 2015.11.14 > 07Prev  Next

Material for Standard Valve Guides
By John A. Tuttle

Hi All,  Thanks to help from Gordon Ramsey, I believe I have
identified the material that was used to make the Standard valve
guides as 'commercial grade vulcanized fibre'.  I always wondered
why the guides were listed in the PPCo catalog as being made out
of "red fibre".  I thought they just misspelled the word or were
using the European spelling of the word 'fiber'.  Now, I believe
they used the correct word.

In looking through some of my other old parts, I found other
valve guides that are made from the same material.  So, it was
(what I would call) common in the industry, and it helps explain
why the material doesn't react with other metals, as would be the
case if it was a 'paper' product with some acid content.  By the way,
this material is commonly used as an insulator in electrical devices.

John A Tuttle
Brick, New Jersey, USA

(Message sent Sat 14 Nov 2015, 19:05:29 GMT, from time zone GMT-0800.)

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

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