Spi Z9301 Micrometer Anvil Knife 1-12 Inch

Product Description

The SPI Z9301 is a knife-type replacement anvil designed for use with outside micrometers ranging from 1 to 12 inches in capacity. The anvil is a critical contact component in micrometer assemblies, providing the fixed measuring surface against which the spindle advances to take a precise dimensional reading. This replacement accessory weighs 0.15 pounds and is sold individually. It is typically installed by machinists, tool-and-die technicians, metrology lab personnel, and precision measurement professionals who need to restore or reconfigure a worn or damaged micrometer to service.

The Z9301 knife anvil is suited for applications requiring measurement of narrow grooves, keyways, and other features where a standard flat anvil cannot make proper contact. It fits into the broad range of 1 to 12 inch outside micrometers, making it a versatile service part for shops that maintain multiple micrometer sizes. It is appropriate for both production floor and quality-control lab environments where accurate linear measurement is required.

Key Features

• Knife-type anvil geometry for measuring grooves, slots, and narrow features
• Compatible with outside micrometers from 1 to 12 inches in capacity
• Sold as a single replacement unit — no additional pieces included
• Lightweight at 0.15 pounds for easy handling during micrometer service

Compatibility

Designed for use with 1 to 12 inch outside micrometers as a knife-type anvil replacement. No specific brand model compatibility was provided by the manufacturer for this part.

Installation Notes

Anvil replacement should be performed by a qualified metrologist or toolroom technician familiar with micrometer disassembly procedures. Before replacing the anvil, ensure the micrometer is fully cleaned and inspected for spindle wear or frame damage. After installation, the micrometer must be re-calibrated and verified against a certified gauge block set before returning to service. Follow the original equipment manufacturer service documentation for torque and seating procedures specific to your micrometer model.