Spi 14-874-2 Adjustable Parallel 11/16 to 15/16 Inches

Product Description

The SPI 14-874-2 is an adjustable parallel used for precision setup and layout work in machining, toolmaking, and metalworking applications. It spans an adjustment range of 11/16 inch to 15/16 inch, making it well suited for a variety of workholding and gauging tasks. The parallel measures 2-11/16 inches in length and 9/32 inch in thickness, providing a compact, rigid reference surface. Weighing approximately 1 pound, the unit is sized for bench use in machine shops and tool rooms. Licensed machinists, toolmakers, and precision grinders rely on adjustable parallels like this one to establish consistent, repeatable setups in milling, grinding, and inspection fixtures.

This adjustable parallel is intended for use in professional machine shop environments where precise workholding and part support are required. It is suited for setting vise jaws, supporting workpieces during surface grinding, and establishing reference datums during layout. The compact form factor allows it to be used in tighter setups where fixed parallels cannot be adjusted to the required height. It is appropriate for both production and toolroom settings.

Key Features

• Adjustment range of 11/16 inch to 15/16 inch for flexible workholding setups
• Overall length of 2-11/16 inches provides a stable reference surface
• Thickness of 9/32 inch (0.2813 inch) for use in tight clearance setups
• Compact and lightweight at approximately 1 pound for easy bench handling
• Sold individually — quantity of one per package

Compatibility

Designed as a general-purpose adjustable parallel for use in machine shop vises, surface grinders, and inspection fixtures requiring a height range of 11/16 inch to 15/16 inch.

Installation Notes

Adjustable parallels are typically set and used by machinists or toolmakers during workpiece setup — no power tools or electrical shutdown procedures are required. Adjust the parallel to the desired height before placing it in the vise or fixture, then verify seating with light hand pressure to confirm full contact. Avoid using parallels as striking or clamping surfaces, as damage to the precision ground faces will affect accuracy. Periodic cleaning and light oiling will maintain surface condition and measurement reliability.