How do you use a dial bore gauge?


Use a machinists rule to determine the rough opening. Dress the zero end of the rule to one edge of the hole, making the point 180 degrees away from the zero end. Install the anvil, which should be long enough to touch the side of the bore when inserted in the hole. Choose a micrometer and set it for the target measurement. Record this number. Put the anvil and stud between the micrometers surfaces. Finally, turn the bezel until the zero is in line with the needle.
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2 Additional Answers Answer for: how to use a dial bore gauge
How to Use a Dial Bore Gauge
Dial-bore gauges (DB) or dial indicators, when used in conjunction with a micrometer, can give very accurate and precise inside measurements. Used for holes of at least two inches in diameter, they consist of a base that houses an interchangeable anvil... More »
Difficulty: Moderately Easy
Dial bore gauges are used for checking the inner diameter of a hole or bore. Lets say you have a hole that is supposed to be 1-1/16 i.d. Grab a one inch dial bore and the correct tip. Screw the tip on and with a hole gauge calibrate the dial to zero. Place the bore gauge in the hole and tilt back and forth until you find the low spot. This will be the size of the bore. So we have a one inch gauge and lets say the dial reads .0625 then we have 1.0625 which is 1-1/16 exact. That's all there is to it.
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