Value Collection 637-7636 Tool Steel Parallel Matched Pair

Product Description

The VALUE COLLECTION 637-7636 is a matched pair of tool steel parallels used in machining, grinding, and precision workholding setups. Measuring 12 inches long, 2 inches high, and 1.5 inches thick, these parallels provide a stable, accurate reference surface for supporting workpieces in milling vises, surface grinders, and inspection fixtures. Hardened to 58 Rc, the tool steel construction resists wear and maintains flatness under repeated clamping load. Squareness is held to 0.0005 inches per 1 inch, making these suitable for close-tolerance setups where consistent height and parallelism across the pair are required.

These parallels are used in job shops, tool rooms, and precision machine shops. They are commonly placed inside milling vises to raise a workpiece above the vise jaw, ensuring the cutting tool clears the jaw face while the part is fully supported. Surface grinder operators use them to establish a consistent datum under a workpiece. The matched pair design means both pieces are ground to the same height tolerance, so they can be used together without introducing variation across a supported part.

Key Features

• Matched pair ground to consistent height for uniform workpiece support
• Hardened to 58 Rc for wear resistance in repeated-use toolroom applications
• Squareness tolerance of 0.0005 inches per 1 inch for precision setups
• Tool steel construction maintains dimensional stability under clamping pressure
• 12-inch length accommodates wider workpieces and vise setups

Compatibility

Designed for use in standard milling vises, surface grinder magnetic chucks, and precision workholding fixtures where a hardened, ground parallel is required for workpiece support and datum establishment.

Installation Notes

Parallels are set in place by machinists and toolroom personnel — no permanent fastening is required. Before use, clean contact surfaces on both the parallel and the vise or fixture to remove chips, burrs, and coolant residue that could affect seating accuracy. Tap the workpiece down onto the parallels with a soft mallet after initial clamping to ensure full contact, then re-tighten. Store parallels protected from impact and corrosion to preserve ground surfaces between uses.