Spi 14-121-8 Telescoping Gage 2.125 to 3.5 Inch Range

Product Description

The SPI 14-121-8 is a telescoping gage designed to measure inside diameters, bores, and slots in the 2.125 to 3.5 inch range. The tool uses a spring-loaded, self-centering plunger mechanism that locks at the measured dimension, allowing the technician to transfer the reading to an outside micrometer or caliper for a precise measurement. The overall length is 5.875 inches, with a 5 inch handle. The gage is constructed from hardened tool steel with a satin chrome finish that resists corrosion and reduces glare during use. Machinists, toolmakers, engine rebuilders, and maintenance mechanics rely on telescoping gages for accurate bore and ID measurement in production and field service environments.

This telescoping gage is suited for use in machine shops, engine rebuilding, and general precision measurement applications where inside diameter readings are needed in the 2.125 to 3.5 inch range. It is a standard hand tool used alongside outside micrometers to achieve accurate bore measurements. The compact overall length makes it practical for both bench work and access to confined bores in machinery and engine blocks.

Key Features

• Measurement range of 2.125 to 3.5 inches covers a wide variety of bore and slot sizes
• Hardened tool steel construction provides durability in production and shop use
• Satin chrome finish reduces surface glare and provides corrosion resistance
• 5 inch handle length offers controlled grip during measurement transfer
• 5.875 inch overall length suits both open bench work and moderately confined bores
• Spring-loaded plunger locks at measured dimension for reliable micrometer transfer

Compatibility

Designed as a standard telescoping gage for use with outside micrometers or calipers in general precision measurement and bore inspection applications.

Installation Notes

Telescoping gages are handled by machinists, mechanics, and precision measurement technicians. Before use, ensure the locking mechanism moves freely and the contact faces are clean and free of debris. Compress the plunger fully before inserting into the bore, then allow it to expand and lock before withdrawing for transfer measurement. Do not force the gage into bores smaller than the minimum range, as this will damage the spring mechanism.