Spi 98-417-9 Thin Parallel Set 20 Piece 6 Inch

Product Description

The SPI 98-417-9 is a 20-piece thin parallel set designed for precision machining setups where standard-thickness parallels will not fit. Each parallel measures 6 inches in length and 1/32 inch thick, with a maximum height of 1-5/8 inches. Hardened to 50 Rc, these parallels deliver the rigidity needed to maintain accurate workpiece positioning during milling, grinding, and inspection operations. Parallelism is held to 0.0001 inch and overall accuracy to 0.0002 inch, making this set suitable for close-tolerance work. The set is sold as 10 matched pairs, allowing technicians to work with consistent, verified pairs across a range of setups.

Thin parallel sets like the 98-417-9 are used in machine shops, tool rooms, and precision manufacturing environments. They are particularly useful when workpieces require low-profile support in vises or on surface plates where conventional parallels are too thick. Licensed machinists, tool-and-die makers, and precision grinders are the primary users. The 10 matched-pair format supports setups that demand symmetrical, balanced support on both sides of a workpiece.

Key Features

• 20 pieces sold as 10 matched pairs for symmetrical workpiece support
• 1/32 inch thickness allows use in tight vise and fixture clearances
• 6 inch length provides stable support across common workpiece widths
• 50 Rc hardness resists wear and maintains dimensional integrity over time
• Parallelism held to 0.0001 inch for high-accuracy setups
• Overall accuracy of 0.0002 inch suitable for close-tolerance machining and inspection

Compatibility

Designed as a direct-use thin parallel set for standard milling vises, surface plates, and precision fixturing applications requiring 1/32 inch thick parallels up to 1-5/8 inches in height.

Installation Notes

Parallels should be cleaned of chips and coolant residue before each use to preserve accuracy. Handle with care to avoid nicking the precision ground surfaces. Store in the provided case or a dedicated holder to prevent contact damage between pieces. No special tools are required for use, but verify seating with a dial indicator when tolerances are critical.