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I came across this "bar" in an old machinists tool box. Help me identify it. View attachment 189222View attachment 189223View attachment 189224View attachment 189225
The bar appears to have been scraped What is it called and what purpose does it have?
- he's a nice fellow and will know how to use it.
Any slight rust will maske this worth much less. immediately oil all the faces and wrap it up in a dry place.
Bil lD.
monarchist, so you would buy that without knowing the condition?
From the photo, I'm gonna guess you will need to do some serious scraping, because the scrape marks on that one look to be pretty long, not the type made by anyone finish scraping it to a good surface.
As to the idea of the angle being important... not really. So long as it is more acute than the angle of the dovetails you need to scrape, it's fine. A reference angle can be short, although there can be convenience to a full length perfect angle reference, I suppose.
To add the angle may be a special angle which exactly matches the vee ways on one make of machine. If so this makes it most valuable to someone who works on that brands. For example my Harrison is 75 degrees not a more common 90.
Bill D.
Are you certain of that? A dove tail 15 degrees off of plumb. Seems to ignore best engineering practice. And nothing like any Harrison I've seen.For example my Harrison is 75 degrees not a more common 90.
http://www.practicalmachinist.com/vb/general/sherr-tumico-level-tube-unit-325234/#post2833780
OP's disposing of gear. Put it on Ebay @ $50-$75. Scraping is suspect, but has the right shape to become a usefull tool if some one wanted to refine it. It ain't no ready to go Challenge straight edge.
Thanks for all the informative chatter. I decided to sell it.
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