Spi MS1536-05 Mechanical Depth Micrometer 4 Inch 4 Rods

Product Description

The SPI MS1536-05 is a mechanical depth micrometer designed for precise depth measurement in machining, tooling, and metrology applications. It covers a maximum measurement range of 4 inches using a set of 4 interchangeable rotating rods, each with a diameter of 0.176 inches. The ratchet stop thimble delivers consistent measuring force to improve repeatability across measurements. Graduation is 0.001 inches with an accuracy of 0.0002 inches, making this instrument appropriate for close-tolerance inspection work. The unit ships NIST certified and includes a short-form certificate of calibration, so it is ready for use in quality-controlled environments upon receipt.

This depth micrometer is suited for shop floor and inspection room use in precision manufacturing, tool and die, and quality assurance settings. The 2.5-inch base length provides stable contact across a variety of workpiece surfaces. Machinists, metrologists, and quality control technicians typically use this instrument for measuring slot depths, counterbore depths, shoulder heights, and similar features requiring traceable dimensional verification.

Key Features

• 4-inch maximum measurement range with 4 interchangeable rotating rods
• Ratchet stop thimble for consistent, repeatable measuring force
• 0.001-inch graduation with 0.0002-inch accuracy
• 2.5-inch base length for stable seating on workpiece surfaces
• NIST certified with traceability certification and short-form calibration certificate included
• Includes carrying case and torque wrench

Compatibility

Designed as a standard mechanical depth micrometer for use with interchangeable rotating rods included with the set; compatible with inspection and machining workflows requiring NIST-traceable depth measurement in inch graduations.

Installation Notes

This instrument requires no installation and is used as a handheld measuring tool. Before use, verify the calibration certificate is current and within your facility's recalibration interval requirements. Clean the base and rod contact surfaces before each measurement session to prevent debris from affecting readings. Store in the included case when not in use to protect the measuring faces and rods from damage.