Spi 98-460-9 Steel Parallel Set 6x1-5/8x1/8 Inch

Product Description

The SPI 98-460-9 is a matched pair of hardened steel precision parallels used for workholding, setup, and inspection tasks in machining and toolroom applications. Each parallel measures 6 inches long by 1-5/8 inches high by 1/8 inches thick and features four precision-ground faces. The steel is hardened to 50 Rc, delivering the rigidity and dimensional stability needed for repeatable setups. Squareness is held to 0.0005 inches per 1 inch, making these suitable for tight-tolerance work on mills, grinders, and surface plates. Machinists, toolmakers, and quality-control technicians are the primary users of this type of parallel.

These parallels are well suited to machine shop and toolroom environments where consistent part elevation and squareness are required. Typical applications include raising workpieces in vises for milling or grinding operations, supporting parts during layout and inspection, and establishing datum surfaces. The matched-pair format allows simultaneous support at two points under a workpiece. High-grade hardened tool steel and precision-ground surfaces make the 98-460-9 appropriate for both production shop floors and precision toolroom use.

Key Features

• Four precision-ground faces for versatile orientation and repeatable contact
• Squareness tolerance of 0.0005 inches per 1 inch for tight-tolerance setups
• Hardened to 50 Rc for wear resistance and long-term dimensional stability
• High-grade hardened tool steel construction
• Sold as a matched pair

Compatibility

Designed as an OEM-style precision workholding accessory for use with standard machinist vises, surface grinders, milling machines, and surface plates where parallel workpiece support is required.

Installation Notes

Parallels are placed by machinists or toolmakers directly in the vise or fixture before clamping the workpiece. Surfaces should be clean and free of chips or coolant residue before seating to ensure accurate contact. Handle hardened parallels carefully to avoid edge chipping. Periodic inspection of ground faces for wear or damage is recommended to maintain setup accuracy.