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Moore and Wright Granite inspection table

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Martin W

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#1
Hi, yesterday a friend texted me and said to meet him at a vacant building he is cleaning up to see if I was interested in anything. He was giving me the 10 cent tour and in one corner there is a Moore and Wright granite inspection table with the metal cabinet underneath and a gantry type mechanism on top for measuring. The granite is about 4' wide x 3' x about 8"thick. He said I could buy this cheap. I have no room to store it.
I was thinking about going back and getting it just for the surface plate? I am sorry for no pictures, as my phone was in the truck.

Is this worth saving? How much would it weigh?
Cheers
Martin
 

T Bredehoft

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#2
QUICK ANSWER

Granite weighs approximately 2.75 grams per cubic centimeter, which is 2,750 kilograms per cubic meter.

I think this works out to.02 lbs per cu in. 36 * 48 * 8 =13,842 cu in, * .02 =286.48 #.
OK Guys, that doesn't sound right. Someone correct me.


Yup, my math was off. Thanks.
 
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Rooster

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#3
A Starrett pink 36x48x8 is 1320 lbs.
 

Asm109

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#4
Really rough. 3 ft= 1 m 4ft= 4/3 m 8 inches= 1/5 m

vol = 4/3*1*1/5= 4/15= 1/4m^3 wt= 2750/4 approx. 700 kg = 1400+ pounds

edit: not bad guesstimating
 

Cadillac

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Is it worth saving?? Heck yeah that would be a 5k plate if not more. I purchased a 36x46 cast inspection table from a auction for dirt cheap 75 bucks. Has to weigh around 1500lbs and I think granite weighs more than a cast table. I would say comfortably it’s closer to 2k lbs. The beauty of the granite is you can probably leave outside with a cover? I’d do it!
 

Janderso

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#6
I’m drueling
 

TerryH

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#7
Adding to the "Things I have no need of but want anyway" list. :grin:
 

Janderso

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#8
Yeah well if you find one you suck.
 

dlane

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#9
It’s a rock, ground, good glass is better
 

12bolts

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#10
Any "window" 4' x 3' x 8" thick will not be on a par to a "rock"
 

Tony Wells

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#12
Your mention of a "gantry" makes me think you are looking at a CMM. Typically the plate used on CMM are not lapped flat to the same specifications used on surface plates. It's a different application. I'd look for the rest of it if it were me.

Now with that said, the granite involved will be as stable as any surface plate and most certainly could be used as such if you wanted to have it lapped. It's going to be pretty flat, perhaps flat enough for casual use as a surface plate, just no promises. That sounds like a "goodie-to-grab" in any case if the price is right.
 
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