Starrett 50947 Mechanical Outside Micrometer 1 in

Product Description

The STARRETT 50947 is a mechanical outside micrometer designed for precise linear measurement of external dimensions. It delivers a measurement range of 1 inch with a graduation of 0.0001 inches and an accuracy of 0.000050 inches, making it suitable for close-tolerance inspection work in machining, manufacturing, and metrology applications. The micrometer features a friction thimble for consistent measuring force and a satin chrome finish that reduces glare during use. Measuring faces are solid carbide for long-term wear resistance. A ring-style lock nut secures the spindle position once a measurement is taken. Machinists, quality control technicians, and tool-and-die professionals are the primary users.

This micrometer is suited for shop-floor and inspection-room use where repeatable, high-accuracy outside measurements are required. Typical applications include checking shaft diameters, tool stock, and machined part dimensions in both production and job-shop environments. The flat anvil configuration accommodates a wide range of workpiece geometries. The included lock nut and wrench support secure readings during recording or comparison work.

Key Features

• 1 inch measurement range with 0.0001 inch graduation for fine-resolution readings
• Accuracy of 0.000050 inches for close-tolerance inspection
• Solid carbide measuring faces for extended wear life
• Friction thimble provides consistent, repeatable measuring force
• Ring-style lock nut holds spindle position during measurement recording
• Satin chrome finish reduces reflective glare in bright shop environments
• Includes lock nut and wrench for field adjustments

Compatibility

Designed as a standard outside micrometer for general mechanical measurement tasks requiring a 0 to 1 inch range and 0.0001 inch graduation resolution.

Installation Notes

Outside micrometers require no installation, but should be cleaned and zeroed against a calibration standard before use. Store the micrometer with the anvil and spindle faces slightly separated to prevent thermal expansion damage. Calibration and verification should be performed by a qualified metrologist or toolroom technician in accordance with applicable metrology standards. Avoid dropping or impacting the instrument, as this can affect calibration.