Mitutoyo 155-125 Telescoping Gage 2.125-3.5 Inch Range

The Mitutoyo 155-125 is a precision telescoping gage designed for accurate measurement of internal diameters, bore sizes, and groove widths in the 2.125 to 3.5 inch range. This essential measuring tool is ideal for quality control, inspection, and machining applications where precise internal measurements are critical.

Key Features:

• Spring-loaded plunger mechanism expands within bores and grooves for accurate diameter determination
• Knurled clamp screw locks the measurement in place for transfer to a micrometer or caliper
• Measurement range: 2.125 to 3.5 inches
• Hardened and ground contact points ensure durability and measurement accuracy
• Available individually or as part of set 155-904

Telescoping gages are used by inserting the tool into the bore with the plungers compressed, then releasing them to spring outward against the bore walls. The knurled clamp is tightened to lock the measurement, and the gage is removed for measurement with an external micrometer. This indirect measuring method provides highly accurate internal dimension readings in applications where direct measurement is difficult or impossible.