Small Hole Gauge (.40" to .50") T&E Tools MT171-D

Small Hole Gauge (.40" to .50") T&E Tools

• MT171-D ​ They require a slightly different technique to the telescopic gauges, the small hole gauge is initially set smaller than the bore to be measured
• It is then inserted into the bore and adjusted by rotating the knurled knob at the base, until light pressure is felt when the gauge is slightly moved in the bore
• After being withdrawn the gauge is then removed and measured with the aid of a micrometer

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