Value Collection 637-7501 Tool Steel Two Face Parallel

Product Description

The VALUE COLLECTION 637-7501 is a matched pair of two face parallels machined from tool steel for use in precision metalworking and machining setups. Each parallel measures 6 inches long, 1-1/4 inches high, and 1/2 inch thick, with a parallelism tolerance of 0.0003 inches across the full length. Hardness is rated at 55-62 Rc, providing the durability and resistance to wear that production and toolroom environments demand. These parallels are used to support and position workpieces accurately in vises, fixtures, and on surface plates during milling, grinding, and inspection operations.

This matched pair is suited to machine shops, tool and die operations, and general metalworking setups where consistent, repeatable workpiece elevation is required. The 6-inch length and 1-1/4-inch height make them practical for a wide range of vise sizes commonly found in vertical milling and surface grinding applications. Squareness is held to 0.0003 inches per 6 inches, supporting use in close-tolerance layout and inspection work as well as standard fixturing.

Key Features

• Parallelism tolerance of 0.0003 inches for high-precision workpiece positioning
• Squareness of 0.0003 inches per 6 inches
• Accuracy rated to 0.001 inches
• Tool steel construction hardened to 55-62 Rc for long service life
• Sold as a matched pair for consistent setup repeatability
• Compact 1/2-inch thickness fits standard vise configurations

Compatibility

Designed as a general-purpose OEM-style replacement or direct-use matched parallel set suitable for standard machinist vises, surface plates, and fixturing applications in milling and grinding operations.

Installation Notes

Parallels are typically positioned by machinists or toolmakers inside a milling or grinding vise beneath the workpiece before clamping. Clean all mating surfaces before placement to prevent measurement error caused by chips or debris. Handle with care to avoid nicks or burrs on the precision ground faces, as surface damage will affect accuracy. Store in a protective case or wrapped when not in use to maintain the ground surfaces.