Re: [ATM] First Lap Tips - THANKS!

[Paul Johnson <bigatm@mn.rr.com>]

Jerry,

  Thank you for the great post about working with pitch.  I'm a n00b myself and enjoyed reading your post but i have one question.  For the steel ball test, does one have to use coffee?  or would some other equivalent mass work?

Also, i hope you know i'm kidding about the coffee, but not about enjoying your post.

Paul Johnson
St. Paul, Minnesota USA
9:29 AM (UTC -6)

Friday, 6/11/2004 @ 9:12 PM; Jerry wrote:

I had a pitch lap that worked
perfect for me so I put a 1/4" steel ball on that lap and made a jig that
held a 2 pound bag of coffee (almost a kilogram for metricites) putting all
the weight of the bag on the ball and in five minutes I saw that it went
just slightly more than 1/3 of its diameter into the pitch. So I melted some
soft pitch and some hard and mixed small amounts in different ratios and
poured into 3/8" thick X 1 inch disks (about 10 X 25mm) and tested for
similar results with the steel ball and coffee. 

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