View Full Version : Starrett ruler question
dennis thompson
08-30-2008, 5:45 PM
I just bought a 12" Starrett ruler on Ebay. When I compare it to my other 12" rulers it's 3/16" longer. On the ruler it says "shrink 3/16 to foot".
Does anyone have any idea what that's all about?
Thanks
Dennis
Ray Newman
08-30-2008, 5:58 PM
I do believe that it is a pattern maker's rule.
The rule takes into account the metal shrinkage when making wooden patterns for castings.
Frank Drew
08-30-2008, 6:47 PM
It's called a shrink rule, and there are various sizes; Ray explains the reason. A bit more on them:
http://www.nonesuchtools.com/pmkr/shrink.html
They also make exact size rules; great company, Starrett.
glenn bradley
08-30-2008, 6:50 PM
I'm thinking that Dennis was not after a shrink-rule. Darn.
Bruce Page
08-30-2008, 8:08 PM
I'm thinking that Dennis was not after a shrink-rule. Darn.
Yep. I was burnt by one of those things once.
Not much use for them unless you're a pattern maker.
Peter Quinn
08-30-2008, 9:20 PM
That must be why most of my cuts come out inaccurate in some way. I have been using a shrink rule all this time! Or maybe a dufuss rule?
dennis thompson
08-31-2008, 7:21 AM
I certainly wasn't after a "shrink" ruler, but it was only $5 so it's a pretty cheap lesson
Dennis
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