Caliper INSIZE 150 mm model 1223-150, resolution 0.05 mm, 6"/150 mm measuring range

INSIZE 150 mm caliper model 1223-150 is a mechanical vernier measuring tool with a 150 mm (6") measuring range and 0.05 mm resolution. The instrument measures external, internal and depth dimensions with a fine scale division and provides direct analog readout. Constructed for workshop use and inspection tasks, this caliper is intended for applications where a reliable mechanical vernier is preferred over electronic alternatives.

Advantages

The vernier caliper offers precise manual measurement with 0.05 mm resolution and a clear graduated scale for direct reading without batteries. Robust construction ensures stable performance in workshop environments and during routine inspection. Its compact 150 mm range balances portability and capability for typical metalworking, maintenance and quality-control tasks. The tool's simple mechanical design reduces sensitivity to electrical interference and eliminates the need for electronic servicing.

Suitable for

• External diameter and length measurements of small components
• Internal bore and slot width checks
• Depth measurements of recesses and steps
• Routine workshop inspection and mechanical maintenance
• Quality-control verification in metalworking and fabrication

Key specifications

• Measuring range: 150 mm (6")
• Resolution: 0.05 mm
• Measurement types: external, internal and depth
• Display type: mechanical vernier scale (analog)
• Construction: metal frame and jaws suitable for workshop use

How to use

Clean mating surfaces of the caliper jaws and the workpiece before measurement. For external measurements, close the jaws gently around the part and read the main and vernier scales to determine the dimension to 0.05 mm. For internal measurements, insert the smaller jaws into the bore, expand until they contact both sides and read the scales. For depth measurements, extend the depth rod into the feature until the base rests flat on the reference surface, then read the scale. Use a light, consistent closing force to avoid deflection and repeat measurements to confirm repeatability.

Usage recommendations

Store the caliper in a protective case when not in use, keep it free from chips and coolant, and periodically check calibration against a certified gauge block or reference standard to maintain measurement accuracy.