Spi MS1536-07 Mechanical Depth Micrometer 6 Inch 6 Rods

Product Description

The SPI MS1536-07 is a mechanical depth micrometer designed for precise depth measurement in machining, toolroom, and inspection environments. It covers a maximum measurement range of 6 inches using a set of 6 interchangeable rotating rods, each with a diameter of 0.176 inches (4.50 mm). The ratchet stop thimble delivers consistent measuring force, reducing operator-to-operator variation. Graduation is 0.001 inches with an accuracy of 0.0002 inches, making it suitable for close-tolerance work. The unit ships NIST certified and includes a short-form certificate of calibration, a carrying case, and a torque wrench for rod changes.

This depth micrometer is used in precision measurement applications including verifying bore depth, shoulder depth, slot depth, and step height on machined components. The 4-inch base length provides a stable reference surface across wider features. It is well suited for quality control inspectors, toolmakers, machinists, and metrology technicians working in production or job-shop settings where traceable calibration documentation is required.

Key Features

• 6-inch maximum measurement range with 6 interchangeable rotating rods
• Ratchet stop thimble for repeatable, consistent measuring pressure
• 0.001-inch graduation with 0.0002-inch accuracy
• 4-inch base length for stable contact across wide surfaces
• NIST-certified with traceability certification and short-form calibration certificate included
• Includes carrying case and torque wrench for rod installation

Compatibility

Designed as a standalone mechanical depth micrometer with 6 rotating rods included; compatible with standard depth micrometer rod accessories sharing a 0.176-inch rod diameter where interchange is supported by the manufacturer.

Installation Notes

Depth micrometers should be handled and stored by qualified machinists or metrology personnel familiar with precision measuring instruments. Before use, clean the base and rod contact surfaces and verify the zero setting against a reference flat. Do not overtighten the rod locking mechanism; use the included torque wrench to secure rods to the specified feel to avoid damaging the spindle threads. Recalibrate or verify against gauge blocks periodically, especially after dropping or any impact to the instrument.