Precision Brand 15150 Key Stock 1/4x1/8x12 in Zinc 6pc

Product Description

The PRECISION BRAND 15150 is a zinc-finished, low-carbon steel key stock bar used to secure rotating components such as pulleys, gears, and sprockets to shafts in power transmission assemblies. Each bar measures 0.25 inches wide by 0.125 inches tall by 12 inches long and is manufactured to ASTM A108 material specification. Hardness falls in the Rockwell B80-90 range, giving the stock enough shear strength for standard drive applications while remaining machinable for custom-length cuts. This package contains 6 pieces. Machinists, millwrights, and maintenance technicians are the primary installers.

Key stock of this profile is commonly used in light-to-medium duty shaft-and-hub assemblies found in industrial equipment, conveyor drives, pump shafts, HVAC fan assemblies, and general mechanical power transmission setups. The 0.25 x 0.125 inch cross-section fits standard 1/4-inch keyways milled into shafts and hubs. The zinc finish provides a basic level of corrosion resistance suitable for indoor and light-exposure environments. Field techs typically cut pieces to the required length using a bandsaw, angle grinder, or hacksaw before installation.

Key Features

• Low-carbon steel construction per ASTM A108 for consistent machinability and shear performance
• Rockwell B80-90 hardness rating suitable for standard power transmission keyway applications
• Zinc finish provides basic corrosion resistance for indoor and protected environments
• 0.25 x 0.125 x 12 inch bar dimensions fit standard 1/4-inch keyway profiles
• Package includes 6 individual pieces for stocking or multiple-job use

Compatibility

Designed as a standard replacement key stock for shaft-and-hub assemblies using a 1/4-inch wide by 1/8-inch tall keyway profile in industrial, commercial, and mechanical power transmission applications.

Installation Notes

Installation is typically performed by a machinist or millwright. De-energize and lock out the equipment before removing any shaft-mounted components. Key stock is commonly cut to length in the field using a bandsaw or hacksaw and deburred before seating in the keyway. Ensure the key fits snugly without binding in both the shaft keyway and hub keyway before final assembly.