Spi MS1536-06B Mechanical Depth Micrometer 12 Inch

Product Description

The SPI MS1536-06B is a mechanical depth micrometer designed for precise depth measurement in machining, metalworking, and inspection applications. It delivers a 12-inch measurement range using a set of 12 interchangeable rotating rods, each with a 0.176-inch diameter. The ratchet stop thimble ensures consistent measuring pressure across readings, and a 0.001-inch graduation provides resolution suitable for close-tolerance work. The unit ships NIST certified, with a short-form certificate of calibration and a torque wrench included. Machinists, tool-and-die technicians, and quality control inspectors are the primary users of this instrument.

This depth micrometer is suited for measuring slot depths, counterbore depths, stepped surfaces, and other recessed features on metal workpieces. The 2.5-inch base length provides stable seating across a wide range of part geometries. With 12 rods covering the full 12-inch range, the instrument handles both shallow and deep measurements without needing a separate tool. It is appropriate for use in production shops, job shops, and inspection rooms where traceable calibration is required by a quality management system.

Key Features

• 12-inch total measurement range with 12 interchangeable rotating rods
• 0.001-inch graduation for fine-resolution depth readings
• Accuracy of 0.00028 inches, meeting close-tolerance inspection requirements
• Ratchet stop thimble for repeatable, consistent measuring force
• 2.5-inch base length for stable contact across varied part surfaces
• NIST certified with short-form certificate of calibration included
• Includes torque wrench and carrying case

Compatibility

Designed as an OEM-style depth micrometer for general machining and inspection use wherever a 12-inch range mechanical depth micrometer with rotating rods is specified.

Installation Notes

This instrument is a precision measuring tool and does not require installation in the traditional sense. Handle with clean, dry hands or cotton gloves to prevent corrosion from skin oils. Store in the included case when not in use to protect the measuring faces and rods. Calibration should be verified periodically against a known reference surface per your facility quality procedures.