Spi 11-576-6 Mechanical Depth Micrometer 300mm 12 Rods

Product Description

The SPI 11-576-6 is a mechanical depth micrometer designed for precise depth measurement across a 300 mm range using a set of 12 interchangeable rotating rods. The tool features a ratchet stop thimble for consistent measuring force and delivers a graduation of 0.01 mm with an accuracy of 0.005 mm. The 100 mm base length provides a stable reference surface on flat workpieces. It ships calibrated and NIST-traceable, making it ready for use in quality-controlled environments. Machinists, tool and die makers, and metrology technicians rely on this type of instrument for verifying bore depths, shoulder depths, and slot measurements in production and inspection settings.

This depth micrometer is suited for precision machining shops, manufacturing facilities, and inspection labs where traceable measurement documentation is required. The 12-rod set covers the full 300 mm range without gaps, and each rod measures 4.50 mm (0.176 inches) in diameter. The included short-form certificate of calibration and NIST traceability documentation satisfy most quality system requirements out of the box. A torque wrench and storage case are included.

Key Features

• 300 mm maximum measurement range with 12 interchangeable rotating rods
• 0.01 mm graduation and 0.005 mm accuracy for high-precision depth measurement
• Ratchet stop thimble ensures repeatable, consistent measuring force
• 100 mm base length for stable seating on flat reference surfaces
• Ships calibrated with NIST-traceable short-form certificate of calibration
• Includes storage case and torque wrench

Compatibility

Designed as a general-purpose mechanical depth micrometer for use in machining, manufacturing, and metrology applications where a 300 mm range and NIST-traceable calibration are required.

Installation Notes

Depth micrometers are precision instruments and should be handled by qualified metrology or machining personnel. Store in the included case when not in use to prevent damage to the measuring faces and rods. Zero the instrument on a known flat reference surface before taking measurements. Avoid dropping or forcing the thimble, as this can affect calibration accuracy.