Precision Brand 56501 Mill Stock Key Stock 1/8x1/8x12 in 6pc

Product Description

The PRECISION BRAND 56501 is a mill stock key stock bar made from low-carbon steel to ASTM A108 specification. Key stock is used to transmit torque between a shaft and a hub, such as a pulley, sprocket, gear, or coupling. This piece measures 1/8 inch wide by 1/8 inch tall by 12 inches long with a plain finish. Hardness is rated at Rockwell B80-90, providing reliable shear strength for light-duty power transmission applications. Each package contains 6 pieces. Machinists, millwrights, and maintenance technicians typically cut and fit this stock to length on the job.

Mill stock key stock is used across a wide range of industrial, commercial, and facility maintenance applications. It is suited for keyed shaft assemblies found in pumps, fans, conveyor drives, and general machinery. The 1/8 by 1/8 inch cross section fits standard keyways of the same dimension. The 12-inch length allows the installer to cut pieces to the required length using a bandsaw, angle grinder, or cut-off wheel. This product ships in a 6-piece pack, making it practical for shops and service vehicles that stock common key stock sizes.

Key Features

• Low-carbon steel construction per ASTM A108 material specification
• Rockwell B80-90 hardness for consistent shear performance in keyed joints
• 1/8 inch x 1/8 inch cross section fits standard keyways of the same size
• 12-inch length can be cut to fit during installation
• Plain finish for direct use or further machining
• Packaged as 6 pieces per order

Compatibility

Designed as a standard mill stock key stock replacement for any keyed shaft and hub assembly requiring a 1/8 inch x 1/8 inch keyway cross section.

Installation Notes

Installation is typically performed by a machinist or millwright. De-energize and lock out the equipment before removing or installing key stock. Cut the key to the required length using appropriate metal cutting tools and deburr all edges before fitting. Verify keyway dimensions on both the shaft and hub before installation to ensure proper fit and torque transfer.