Primitive dial Borge gauge
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Primitive dial Borge gauge
Any one Remember using one of these.
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Re: Primitive dial bore gauge
I have one in the metrology box. Haven't used it in years.
Back in the day, all OEM Shop Manuals had a bore taper specification. Less than .005", for example, it could be re-ringed with original pistons.
Along with the dial bore gauge had to be a bore ridge reamer.
In the wrong hands, these would do terrible things to the tops of the cylinder bores.
When we shred an old engine, run 100,000 miles with a carburetor, it's not unusual to find .010" ridge at the top of the cylinders, might not clean up with a .030" overbore. Engines built with EFI and a computer run 250,000 will often still show the honing crosshatch; could be rebuilt without a overbore.
Back in the day, all OEM Shop Manuals had a bore taper specification. Less than .005", for example, it could be re-ringed with original pistons.
Along with the dial bore gauge had to be a bore ridge reamer.
In the wrong hands, these would do terrible things to the tops of the cylinder bores.
When we shred an old engine, run 100,000 miles with a carburetor, it's not unusual to find .010" ridge at the top of the cylinders, might not clean up with a .030" overbore. Engines built with EFI and a computer run 250,000 will often still show the honing crosshatch; could be rebuilt without a overbore.
Jack Vines
Studebaker-Packard V8 Limited
Obsolete Engineering
Studebaker-Packard V8 Limited
Obsolete Engineering
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Re: Primitive dial Borge gauge
I have that exact same one. It was my grandfather's. BC Ames Co Pat July 6 1925
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Re: Primitive dial Borge gauge
B. C. Ames Co.
Waltham, MA, U.S.A.
Manufacturer Class: Metal Working Machinery
http://vintagemachinery.org/mfgindex/de ... 2292&tab=7
Waltham, MA, U.S.A.
Manufacturer Class: Metal Working Machinery
http://vintagemachinery.org/mfgindex/de ... 2292&tab=7
https://www.semasan.com/breaking-news-archives?utm_campaign=DrivingForce_DF272&utm_content=SeeAllLeg