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- Sep 8, 2019
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- 4,392
Also called Smooth Bore Ring Gages, most Bore Gage Setting Rings are out of my price range! The Ringmaster brand is almost affordable to me. There is a used 2.000” one for $82.00 on eBay.
I just bought four Shars inside micrometers, and the 0.2-1.2” and 1-2” both came with such a gage. It sure was nice to test out these inside micrometers as soon as I opened the boxes.
The 2-3” and 3-4” inside micrometers did not include such a gage. I almost always check the zero on my micrometers before I take a measurement in the shop. I would like to have something in these ranges to check the larger inside micrometers.
I saw in a Blondihacks YouTube video where she used the ID of a bearing in order to demonstrate the use of telescoping gauges. She pointed out that a bearing is precision made with a smooth finish.
So is a bearing an acceptable alternative to a Bore Gage Setting Ring? Bearings are pretty inexpensive. One could possibly just buy and utilize an inner race.
One could also use a gauge block (e.g. 2.000”) to get a known distance on a micrometer, lock the micrometer, and then measure the distance between the anvils of the outside mic with the inside micrometer. Of course, this could risk abusing the outside mic (it certainly wouldn’t do it any good pushing against the anvils of a locked micrometer).
Any other ideas on an economical alternative to smooth bore ring gages? Maybe a good DIY project?
I just bought four Shars inside micrometers, and the 0.2-1.2” and 1-2” both came with such a gage. It sure was nice to test out these inside micrometers as soon as I opened the boxes.
The 2-3” and 3-4” inside micrometers did not include such a gage. I almost always check the zero on my micrometers before I take a measurement in the shop. I would like to have something in these ranges to check the larger inside micrometers.
I saw in a Blondihacks YouTube video where she used the ID of a bearing in order to demonstrate the use of telescoping gauges. She pointed out that a bearing is precision made with a smooth finish.
So is a bearing an acceptable alternative to a Bore Gage Setting Ring? Bearings are pretty inexpensive. One could possibly just buy and utilize an inner race.
One could also use a gauge block (e.g. 2.000”) to get a known distance on a micrometer, lock the micrometer, and then measure the distance between the anvils of the outside mic with the inside micrometer. Of course, this could risk abusing the outside mic (it certainly wouldn’t do it any good pushing against the anvils of a locked micrometer).
Any other ideas on an economical alternative to smooth bore ring gages? Maybe a good DIY project?
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