What's this tool/fixture?

Playingwithmetal

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Hey. I picked this up for a buck at a closing machine/welding shop. None of the employees were there so I couldn't ask anyone what it was. I think it's cast iron. I thought it was some type of lapping plate maybe unfinished. I'm certain someone on here will know exactly what it is. I haven't cleaned it up yet (has bits of rust and grime ect...) to put it on surface plate and indicate it to see if its precision.
Thanks in advance.

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i have only seen flat lapping plates, but that doesn't mean they don't come with profiles.
by the looks of the photos, i would not say that it is a precision instrument.
 
I wonder if this is some kind of die for metal shaping?
 
Or just a fixture to lay a round workpiece in, to drill or something?
 
That's sure what I thought. What could the slotting be for other than lapping? Never seen a press die with grooves ?
 
What degree is the V groove?
Size?
I'm having difficulty believing that anyone would want to lap a lathe bed.
But....

What does the other side look like? Am wondering if she was re purposed from something.

Overall size?
She looks ground and not scraped. Is she iron or steel?

Daryl
MN
 
Also since we're in the subject, and I need a lapping plate. Would hand scrapping this against my reference plate make a good lapping plate? I want a good surface to flatten my deburring and sharpening stones. I have used sand paper on my less precision plate but want a cast iron surface.
 
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