What is this???

**MajorPanic** · 3rd May 2004, 10:43 PM

G'day All

Anyone know what this is?. besides being broken it says "The L.S. STARRETT CO. ATHOL MASS. U.S.A.

The graduations on the outer ring are strange 0/0 > 100 in increments of 10 and underneath the increments are reversed eg: 100 > 0/0.
I found it in my fathers tool box and it would have to be @ least 50 years old.
I have no idea what it's for except that what ever stuck out the front edge was plastic and now is broken off.

**Sir Chiz** · 4th May 2004, 04:07 AM

I have no idea what it is,but Starrett has been making precision measuring equiptment for a long time.
Being 50+ years old,I doubt that the broken part is plastic, maybe a piece of bone or ivory for hardness and stability.
If you don't get any help here,you might try contacting them.

http://www.starrett.com/index.cfm

Chiz.

**mjford** · 4th May 2004, 06:19 AM

Hi
Don' panic, it's a rev counter, used to have a rubber covered spindle on the other end that was held on the rotating , whatever and recorded the highest revolutions the motor or whatever was doing at the time.

**MajorPanic** · 4th May 2004, 08:20 AM

Originally posted by mjford
Hi
Don' panic, it's a rev counter, used to have a rubber covered spindle on the other end that was held on the rotating , whatever and recorded the highest revolutions the motor or whatever was doing at the time.

Thanks Dredgemaster, that would fit with other rev counters I found in his toolbox. I searched starrett's web site before I posted the question and didn't find anything like it.
The mystery is solved!!

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