Spi 14-324-8 Mechanical Micrometer 8 Mm Ratchet Stop

Product Description

The SPI 14-324-8 is a mechanical inside micrometer designed for precise internal diameter measurement in machining, inspection, and metrology applications. It features a ratchet stop thimble for consistent measuring force and a solid carbide measuring face for extended wear resistance. With a graduation of 0.001 inches and an accuracy of 0.002 mm, this tool delivers the repeatability required for close-tolerance work. The 14-324-8 is well suited for machinists, quality control technicians, and toolroom professionals who need a reliable mechanical gauging solution for internal bore measurement.

This inside micrometer is intended for use in production machining, toolroom environments, and quality inspection stations where internal bore measurements must meet tight tolerances. It is appropriate for both shop-floor and bench-top use. The 3-contact-point design and 50 mm gage depth make it suitable for measuring bores in engine components, hydraulic cylinders, housings, and similar workpieces. No digital readout is included, making it a straightforward mechanical solution for environments where simplicity and durability are priorities.

Key Features

• Ratchet stop thimble ensures consistent measuring pressure on every reading
• Solid carbide measuring face resists wear for long service life in production environments
• 0.001 inch graduation for high-resolution manual readings
• 0.002 mm accuracy meets close-tolerance inspection requirements
• 3-contact-point design provides stable seating inside bores
• 50 mm gage depth accommodates a range of bore depths

Compatibility

Designed as a standard inside micrometer for use in toolroom, inspection, and production machining applications where internal bore gauging to 8 mm minimum measurement is required.

Installation Notes

Inside micrometers are used by machinists and metrology technicians and do not require installation in the traditional sense. Before use, zero the instrument and verify calibration against a known reference standard. Keep the measuring faces clean and free of chips or debris, which can cause false readings. Store the tool in its case and away from temperature extremes to maintain calibration stability.