The model 4150-D indicating snap gauge is intended to be used for measuring the external diameter of cylindrical parts such as bearing races, journals of shafts and axles etc
Each specimen of the indicating snap gauge is made to measure only one nominal dimension "D"
that was stipulated when ordering and the snap
gauge is not liable to be readjusted to measure another dimension
Measured results are represented in digital form on the visual display of the Federal (USA) electronic indicator inserted in the snap gauge. In accordance with the user’s desire the indicator is able to read either the absolute value of the measured diameter
or its deviation from the nominal value
The setting-up of the snap gauge is carried out with the aid of a rod reference standard (housed in the gauge’s body) by a single depression of a button on the digital indicator.