Spi 11-566-7 Mechanical Depth Micrometer 6 Inch 6 Rods

Product Description

The SPI 11-566-7 is a mechanical depth micrometer with a 6-inch measurement range and a set of 6 interchangeable rotating rods. It is designed for precise depth measurement of slots, holes, and stepped surfaces in machining, tooling, and metrology applications. The thimble uses a ratchet stop mechanism to apply consistent measuring pressure, contributing to its stated accuracy of 0.0002 inches. The 2.5-inch base length provides a stable reference surface. Each unit ships calibrated and includes a short-form certificate of calibration traceable to NIST standards. This instrument is intended for use by machinists, tool-and-die makers, quality control technicians, and precision measurement professionals.

This depth micrometer is suited for production floor and inspection room environments where precise linear depth measurement is required. The 6-rod set allows the instrument to cover the full 6-inch range in 1-inch increments. With a graduation of 0.001 inches and an accuracy of 0.0002 inches, it is appropriate for applications demanding close-tolerance verification. The included torque wrench supports proper rod installation. The instrument arrives ready for use with its NIST-traceable calibration certificate, making it suitable for quality management systems that require documented traceability.

Key Features

• 6-inch maximum measurement range with 6 rotating interchangeable rods
• Ratchet stop thimble for consistent, repeatable measuring pressure
• 0.001-inch graduation with 0.0002-inch stated accuracy
• 2.5-inch base length for stable contact on reference surfaces
• NIST-traceable calibration included; ships calibrated and ready for use
• Includes protective case, short-form certificate of calibration, and torque wrench

Compatibility

Designed as a general-purpose mechanical depth micrometer for use in machine shops, toolrooms, and quality inspection environments requiring NIST-traceable depth measurement up to 6 inches.

Installation Notes

Rod changes should be performed using the included torque wrench to ensure proper seating and measurement integrity. Zero the instrument against a flat reference surface each time a rod is changed. Store rods in the included case to prevent damage to measuring surfaces. No power source is required for operation.