Spi 14-117-6 Telescoping Gage 5/16 to 1/2 Inch

Product Description

The SPI 14-117-6 is a telescoping gage designed to measure inside diameters and bores in the 5/16 inch to 1/2 inch range. The tool locks an internal spring-loaded plunger at the bore diameter, allowing the technician to transfer the measurement to an outside micrometer or caliper for a precise reading. The overall length is 5-7/8 inches, with a 4 inch handle machined from hardened tool steel and finished in satin chrome for corrosion resistance and long service life. Machinists, tool-and-die workers, and precision measurement technicians use this gage for bore inspection and quality control work.

This telescoping gage is suited for precision measurement tasks where inside calipers lack the reach or stability needed. The compact measurement range of 5/16 inch to 1/2 inch makes it appropriate for small bore applications such as hydraulic cylinder bores, valve guides, bushing inside diameters, and similar close-tolerance work in machine shops, maintenance facilities, and light manufacturing environments. The satin chrome finish reduces glare during measurement, which aids readability in shop lighting conditions.

Key Features

• Measurement range: 5/16 inch to 1/2 inch inside diameter
• Overall length: 5-7/8 inches for access in moderate-depth bores
• 4 inch handle length for controlled grip during bore transfer
• Hardened tool steel construction for durability and dimensional stability
• Satin chrome finish resists corrosion and reduces surface glare
• Spring-loaded plunger locks at bore diameter for accurate transfer measurement

Compatibility

Designed as a standard telescoping gage for inside diameter measurement applications requiring a range of 5/16 inch to 1/2 inch; used in conjunction with an outside micrometer or vernier caliper to obtain final readings.

Installation Notes

Telescoping gages are precision hand tools and require no installation. Before use, verify the locking mechanism moves freely and the plunger springs back fully. When transferring a measurement, maintain consistent feel and repeat the measurement at least twice to confirm repeatability. Store the gage in a protective case away from other metal tools to preserve the chrome finish and prevent burring of the contact tips.