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Red Sleeper
07-25-2018, 07:24 AM
Found these when cleaning out my tool box this past weekend from my machine shop days. They came with a group of tools I purchased, never used them but thought they were neat.

I’m sure they are for measuring spindle speed, just wondering if someone can shed some light on their exact use.

They smell like 1970.

https://uploads.tapatalk-cdn.com/20180725/c350e5c3803c7208f2ab4696775c99e1.jpghttps://uploads.tapatalk-cdn.com/20180725/09aa8bea3f5fcd8c184a7e4c3909f978.jpghttps://uploads.tapatalk-cdn.com/20180725/0a87633dbebe905481ecb7d0e0cc3297.jpg
thatguy69
07-25-2018, 07:37 AM
Dam your old

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turbo2387
07-25-2018, 07:43 AM
Grandpa has a tool similiar to that, that he uses on old tractor for PTO output speed.
Red Sleeper
07-25-2018, 10:10 AM
Grandpa has a tool similiar to that, that he uses on old tractor for PTO output speed.



Interesting use and good idea. Being we have a tractor with a non-working tach.
RonA
07-29-2018, 12:39 PM
I've been stuck in one machine shop or another for over 40 years and have not seen one of those. Very cool.