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[Metrology] Resurfacing And Recalibrating Several Surface Plates

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Bob Korves

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#1
Precision Granite (AKA Standridge Granite) is at OxTools (Tom Lipton) freshening up his plates. Really interesting video, and not how I expected the operation would look. Good people, great work...

 

Holescreek

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#3
When I was working in a very large machine shop in Dayton a group of guys from a place in Michigan called "Doc's" drove down in an old box truck style ambulance to recertify/repair all our granite plates. I watched these very strong fellows pick up, flip and spin plates all day long (big granite plates) knocking the high spots down with diamond dust. It seldom took them more that a couple days to do the 60 or so in our plant.
 

A618fan2

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#4
Very cool video - I hate to think what mine would measure out to but then I ain't all that accurate either! Thanks for posting.

John
 

Kennlindeman

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#7
Was looking at Tom's video and was wondering watch the white powder was which they used in between the plates Any ideas
 

Tony Wells

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#8
Graded diamond dust. I've helped lap a few plates.....not much fun.
 

Tony Wells

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#10
That's going to vary widely. How far do the calibration people have to travel? Is that the only plate you need done? How bad is it? Is it a pink plate or softer, black granite? What grade do you need it certed to? You'll have to call around for an estimate in your area.
 

Bob Korves

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#11
That's going to vary widely. How far do the calibration people have to travel? Is that the only plate you need done? How bad is it? Is it a pink plate or softer, black granite? What grade do you need it certed to? You'll have to call around for an estimate in your area.
That is why we got four of us together and had those same guys who did Tom Lipton's plates come and do all of ours at my shop. We got all our plates calibrated, we each saved a lot of money that way, and got a fun social event as part of the deal. What's not to like? :)
http://www.hobby-machinist.com/threads/surface-plate-calibration-collaboration-or-plate-fest.45514/
 

astjp2

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#12
It's a white/gray plate, in Ogden Ut, name brand 50 year old plate that is 49 millionths high to low.
That's going to vary widely. How far do the calibration people have to travel? Is that the only plate you need done? How bad is it? Is it a pink plate or softer, black granite? What grade do you need it certed to? You'll have to call around for an estimate in your area.
 
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