Spi 14-873-4 Adjustable Parallel 1/2 to 11/16 Inches

Product Description

The SPI 14-873-4 is an adjustable parallel designed for precision layout, setup, and inspection work in machine shops and fabrication environments. It spans a measurement range of 0.5 inches to 0.6875 inches, allowing the technician to dial in an exact height for supporting workpieces, setting up milling vises, or establishing reference planes. At 2.125 inches long and 0.28125 inches thick, this is a compact parallel suited for close-tolerance setups where a standard fixed parallel would not offer the needed flexibility. Machinists, tool and die makers, and precision fabricators are the primary users.

Adjustable parallels are used across a range of setup and inspection applications in both production and job-shop environments. This unit is particularly useful when squaring vise jaws, supporting odd-sized workpieces on a surface plate, or shimming fixtures to a precise height. The compact overall length makes it practical for confined setups where a longer parallel would interfere with surrounding tooling or fixturing components.

Key Features

• Adjustable range from 0.5 inches to 0.6875 inches for flexible workpiece support
• Overall length of 2.125 inches suits tight or confined setup locations
• Thickness of 0.28125 inches provides a stable, consistent bearing surface
• Single-piece quantity per package — order exactly what the job requires

Compatibility

Designed as a general-purpose adjustable parallel suitable for standard machinist vises, surface plates, and fixture setups requiring a height range of 0.5 to 0.6875 inches.

Installation Notes

Adjustable parallels are typically set and used by machinists or tool and die professionals. Before placing the parallel in a vise or fixture, ensure all contact surfaces are clean and free of chips or burrs that could affect accuracy. Adjust the parallel to the required height and verify the setting with a micrometer or dial indicator before clamping the workpiece. Handle with care to avoid nicking the precision ground surfaces, as damage will compromise measurement accuracy.