Starrett 50771 Interchangeable Anvil Micrometer 100 Mm

Product Description

The STARRETT 50771 is a mechanical interchangeable anvil micrometer designed for precision outside measurement up to 100 mm. It features a ratchet stop thimble that delivers consistent measuring pressure, reducing operator-to-operator variation on the shop floor or in the field. The graduation of 0.01 mm provides fine resolution suitable for close-tolerance inspection work. This is a manually operated instrument with no digital counter and a fixed, non-rotating spindle, making it straightforward to maintain and calibrate. Licensed metrology technicians, machinists, and quality-control inspectors are the typical end users of this tool.

The 50771 is suited for dimensional inspection tasks where a single micrometer body needs to cover a wide span of measurement ranges through anvil swaps. It is commonly used in manufacturing, toolroom, and job-shop environments for checking shaft diameters, tube walls, and other outside dimensions that fall within the 100 mm total range. The interchangeable anvil design reduces the need to carry multiple dedicated micrometers when working across a range of part sizes.

Key Features

• 100 mm maximum measurement range via interchangeable anvil system
• Ratchet stop thimble ensures repeatable, consistent measuring force
• 0.01 mm graduation for precise dimensional readings
• Mechanical operation — no batteries, no electronics to service
• Non-rotating spindle design reduces wear and maintains alignment
• Single-body platform compatible with multiple anvil sets to cover extended ranges

Compatibility

Designed as an OEM-style replacement or direct-use interchangeable anvil micrometer for standard 100 mm range measurement applications. No specific compatible model numbers or replacement part numbers were provided in the product data.

Installation Notes

This instrument is installed and serviced by machinists, metrologists, or quality-control technicians familiar with precision measuring tools. Before swapping anvils, ensure the spindle is fully retracted and the tool is placed on a clean, stable surface. Calibrate against a known standard or gauge block after any anvil change to verify zero and accuracy. Do not overtighten the anvil lock or use impact tools on any component of the micrometer.