Spi 30-465-9 Caliper Groovemaster 6 Inch Calipers

Product Description

The SPI 30-465-9 is a Groovemaster caliper accessory designed to extend the measuring capability of standard 6-inch vernier, dial, and digital calipers. Machined from steel with a hard chrome coating, it mounts to a compatible caliper jaw to measure internal groove dimensions that a standard caliper cannot reach. The accessory supports groove depth measurements up to 0.05 inches and a minimum bore diameter of 0.2 inches, with a stated accuracy of 0.001 inches. It is a single-piece unit and ships as one item per package. Machinists, tool-and-die technicians, and precision measurement professionals use this type of accessory in inspection and layout work where groove geometry must be verified.

The 30-465-9 is suited for shop-floor and inspection-bench applications where internal groove dimensions in small bores need to be measured. Typical scenarios include checking snap-ring grooves, O-ring grooves, and retaining-ring channels in machined parts. The accessory works with 6-inch vernier, dial, and digital calipers, making it a compact addition to an existing measurement toolkit without requiring a dedicated dedicated groove gauge.

Key Features

• Designed for use with 6-inch vernier, dial, and digital calipers
• Steel construction with hard chrome coating for wear resistance
• Measures groove depths up to 0.05 inches
• Minimum bore diameter of 0.2 inches for access to small internal grooves
• Accuracy of 0.001 inches for precision measurement work
• Single-piece unit — one accessory per package

Compatibility

Designed for use with 6-inch vernier, dial, and digital calipers as a groove-measuring accessory attachment.

Installation Notes

This accessory is installed by a machinist or metrologist onto a compatible 6-inch caliper jaw — no power source or lockout procedure is required. Ensure the caliper is zeroed and the accessory is seated securely before taking measurements. Follow standard metrology practices and handle the hard chrome surfaces carefully to avoid nicks that could affect measurement accuracy.