Bore Gages Instrument Information
A rod containing two or three points on one end and a measurement display device on the other (digital or dial micrometer). The rod is inserted into a machined diameter and the anvils are extended (commonly, by releasing a lever or rotating the micrometer head) to touch the diameter walls, providing a measurement reading on the display.

Common Uses
Quick measurement of a machined diameter, such as a hole, pipe or tube.
Common Types
-
- Readout Type (Dial, Digital)
- Points (2 or 3)
- Threading Attachments
- Rod Length
Measurement Parameter
- Inside Diameter (in, cm)
Calibration Discipline
Calibration Equipment Used
- Cylindrical Rings