Tool Talk

What's-It Forum => What's-It Forum => Topic started by: He11jumper105 on February 09, 2018, 08:39:11 AM

Title: Unknown goodell-pratt company tool
Post by: He11jumper105 on February 09, 2018, 08:39:11 AM
Only thing I know is there is a note that says the following are checked and correct 0001 of an inch. There is one small circular thing with a roughly 10 in handle that screws into it and 6 various-sized bars that attach somehow.
Title: Re: Unknown goodell-pratt company tool
Post by: gibsontool on February 09, 2018, 08:58:26 AM
My guess would be a device to measure the inside diameter of a cylinder. Would be used with an outside micometer.
Title: Re: Unknown goodell-pratt company tool
Post by: turnnut on February 09, 2018, 09:03:03 AM
 I agree, but you would not need the outside mike, the rods are machined and checked for certain lengths, the micromere is the handle
 that reads the same as a micrometer, but you add the rods lengths to the reading.
Title: Re: Unknown goodell-pratt company tool
Post by: Chillylulu on February 09, 2018, 09:42:39 AM
They look like reamers.

When drilling (or boring) a hole to a tight tolerance you drill it undersized, then you ream it to the exact size.

Machinist tools, I would say.

Chilly
Title: Re: Unknown goodell-pratt company tool
Post by: bill300d on February 09, 2018, 10:27:44 AM
not sure which set but these
Title: Re: Unknown goodell-pratt company tool
Post by: lptools on February 09, 2018, 11:21:14 AM
Hello, I agree with turnnut & bill. The photo is blurry, so I am guessing what we see is rust, and or , discoloration on the rods, that gives them the look of being ridged. . Regards, Lou
Title: Re: Unknown goodell-pratt company tool
Post by: Bill Houghton on February 09, 2018, 12:33:54 PM
Yep.  Inside micrometer.  I somehow own two sets, neither of which I've ever used; but I'm ready, if ever called on to, say, measure the inside bore of a steam cylinder on a locomotive.