Mitutoyo 145-185 Caliper Jaw Micrometer 5mm Range

Product Description

The MITUTOYO 145-185 is a mechanical caliper jaw micrometer designed for precision inside-diameter and groove measurement in industrial and toolroom applications. The instrument delivers an accuracy of 0.005 mm over a 5 mm measurement range, with a graduation of 0.01 mm. Measuring faces are machined from solid carbide to resist wear during repeated use. A satin chrome finish reduces glare under shop lighting. This micrometer requires a setting standard to establish the reference point before measurement, which is standard practice for caliper jaw instruments of this type.

Caliper jaw micrometers are used when bore micrometers or telescoping gauges cannot access narrow grooves, undercuts, or small internal features. The 145-185 is suited for toolroom inspection, machinist use on production floors, and quality-control checks where inside dimensions must be confirmed to within a few microns. It is intended for use by machinists, metrologists, and precision tooling technicians working in manufacturing, maintenance, and inspection environments.

Key Features

• 5 mm measurement range for small inside-diameter and groove measurement
• 0.005 mm accuracy for high-precision toolroom and inspection work
• 0.01 mm graduation for direct reading without interpolation
• Solid carbide measuring faces for extended wear life
• Satin chrome finish reduces reflection and corrosion
• Mechanical analog design with no battery or digital counter required

Compatibility

Designed as an OEM-specification caliper jaw micrometer suitable for use with standard Mitutoyo setting standards required to zero the instrument prior to measurement.

Installation Notes

A calibrated setting standard must be used to set the micrometer to the reference point before taking measurements — do not attempt to use this instrument without zeroing it first. Handle measuring faces with care; solid carbide is hard but brittle and can chip if dropped. Clean faces with a lint-free cloth before and after use. Store in the provided case away from magnetic fields, vibration, and temperature extremes to maintain calibration.