Spi 98-430-2 Wavy Parallel Set 18 Piece Steel

Product Description

The SPI 98-430-2 is an 18-piece wavy parallel set designed for precision workholding and setup applications in machining and toolroom environments. Each parallel features a wavy profile that provides a positive grip on workpieces, reducing the risk of shifting during clamping. The set is manufactured from steel and holds a parallelism tolerance of 0.0002 inches, making it suitable for demanding layout, milling, and grinding setups. The 18 pieces are organized as nine matched pairs, allowing techs to select the correct height quickly and maintain consistent workpiece elevation across multiple setups.

Wavy parallel sets like the SPI 98-430-2 are standard toolroom inventory for machine shops, maintenance facilities, and precision manufacturing environments. They are used in vise setups on milling machines, surface grinders, and drill presses where workpieces need to be elevated to a consistent, repeatable height. The wavy contact surface is particularly useful when holding thin or smooth-surfaced parts that tend to shift on conventional flat parallels. The set ships as nine matched pairs for easy organization and storage.

Key Features

• Wavy contact surface reduces workpiece slippage during vise clamping
• Parallelism tolerance of 0.0002 inches for precise, repeatable setups
• Steel construction for durability in shop environments
• 18 pieces organized as nine matched pairs for versatile height selection
• 4-5/16 inch length accommodates standard milling and grinding vise widths
• Maximum height of 1-1/2 inches suits a wide range of workpiece elevations

Compatibility

Designed for general-purpose use in standard machinist vises and workholding fixtures where a 4-5/16 inch parallel length is appropriate.

Installation Notes

Wavy parallels are installed by machinists and toolroom technicians as part of workpiece setup prior to machining operations. Ensure the vise and parallel surfaces are clean and free of chips or burrs before placing parallels to maintain accuracy. Parallels should be lightly tapped with a soft mallet after initial clamping to confirm seating before final torque is applied to the vise. Store matched pairs together to preserve the parallelism integrity of each set.