Has anyone seen one of these?

TakeDeadAim

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I bought this at a sale, unlike most Starrett tools it has not model number. I have looked around a bit and not found one. However I don’t have access to a lot of old tool catalogs.

If anyone has seen a rule like this please let me know what you know about them and what Starrett called them.

Thanks
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Very nice!
I'm not 100 percent sure, but seem to recall something about laying out work on cylindrical parts. Like key ways on shafts?
I'll see if I have it in an old catalogue somewhere.

-frank

Edit: or maybe not, might be getting that mixed up with something else.
 
Thanks gentlemen, I figured someone on this forum would have seen one at some point in our collective years of experience. I "had" to have it when I saw it despite not knowing exactly what I'll use it for and for the price just having it was worth it.
 
I bought this at a sale, unlike most Starrett tools it has not model number. I have looked around a bit and not found one. However I don’t have access to a lot of old tool catalogs.

If anyone has seen a rule like this please let me know what you know about them and what Starrett called them.

Thanks
57bd1c24781e46bc661407221bf8c64b.jpg
c45a98bfdc425d30928bfd8dbf884a63.jpg



Sent from my iPhone using Tapatalk

It is a box square aka key seat rule used to lay out keyways on cylindrical shafts. Starrett and Brown and Sharpe both made them c.a. late 19th century. I couldn't find catalog nos. for either of them.
They have been superseded by key seat clamps, Starrett no. 298, Brown & Sharpe no. 377.
 
Thanks much RJ, funny when I looked at it I thought it would be great for laying out lengths on shafts, guess I was not too far off.
 
Send a pic to Starrett. They will get you the info on it.
 
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