Special manually operated instruments with an electronic digital readout:
Model 4150M

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.


The Indicating Snap Gauge is certified The Russian Federation State Standard Certificate No.17335-98. Registration Certificate No. MT 022.99 in the Branch of Industry Register of measuring means permitted to be used within the railway transport.



Main Technical Data:

Diameter range of checkable parts , mm.: 85.....270
Minimum width of checkable parts, mm.: 35
Principle of operation: Comparison with a Standard
Type of transducer: Inductive
Reading range, mm.: ±0,5
The least significant digit value on the visual display, mm.: 0,001
Type of battery in the electronic unit: 6F22S (or similar)
Snap gauge’s maximum error limit, mm:
Snap gauges for checking diameters from 85 up to 200 mm.: 0,002+0,5% of the measurement range’s value.
Snap gauges for checking diameters from 200 up to 270 mm.: 0,003+0,5% of the measurement range’s value.
Reference master’s maximum error, mm.: 0,0007
Overall dimensions, mm.:
Snap gauges for checking diameter 85 mm.: 160х40х265
Snap gauges for checking diameter 270 mm.: 246х40х382
Mass, kg.:
Snap gauges for checking diameter 85 mm.: 1,1
Snap gauges for checking diameter 270 mm.: 1,9





















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