The model 4150M-D indicating snap gauge is intended to be used for measuring the external diameter of cylindrical parts:
bearing races, journals of shafts and axles etc. and grading them into dimensional groups for the subsequent selective assembly.
Each specimen of the indicating snap gauge is made to measure only one nominal dimension "D" that was stipulated in the order and the snap gauge is not liable to be readjusted in order to measure another dimension.
The indicating snap gauge is provided with a portable electronic unit that has a self-contained power supply.
The setting up of the indicating snap gauge is carried out with the aid of a rod reference standard (housed in the snap gauge’s body) by a single pressure on the button located on the electronic unit’s panel.
Measurement results in the form of deviations of the diameter from the nominal value and the numbers of the graded groups are represented in digital form on the visual display of the portable electronic unit.