Hole Measurement

  • Bore Gage
  • Hole Gages
    • Small Hole Gage
    • Telescoping Gage
  • See also: Gage Pins

Dial Bore Gage

Hole Gages

Small Hole Gage

A Small Hole Gage

To use a small hole gage, it it placed inside a hole and the thimble is opened until the fingers contact the sides of the hole. The gage is removed and the width of the fingers is measured with another measuring instrument such as a micrometer, height gage, or calipers.

A small hole gage in use
The diameter can now be measured accurately

Telescoping Gage

For larger holes, a telescoping gage can be used to transfer the diameter of a hole to a measuring instrument.

A telescoping gage being used

Bore Gage

See also: Gage Pins