One New Aftermarket Replacement Woodruff Key - 1/4" x 1-1/2" (A&I Products WK28)

This Woodruff key is a semi-circular, half-moon shaped shaft key used to lock rotating components - such as pulleys, sprockets, gears, and impellers - onto a shaft, preventing independent rotation. It seats in a semi-circular keyway cut into the shaft, with the flat top face engaging the mating hub or bore keyway to transfer torque. Woodruff keys also serve as a fail-safe, designed to shear under overload before more expensive components are damaged. This key meets ANSI B17.2 / SAE J502 dimensional standards and is widely used across agricultural equipment, lawn and garden machinery, small engines, and general industrial power transmission applications.

Specifications

• Width: 1/4 in.
• Length (Nominal Diameter): 1-1/2 in.
• Style: Semi-circular (Woodruff / half-moon)
• Standard: ANSI B17.2 / SAE J502

Compatible Applications

Universal fitment. Suitable for any shaft and hub assembly using a standard 1/4 in. x 1-1/2 in. Woodruff keyway, including agricultural equipment, lawn and garden tractors, small engines, and general power transmission machinery. Verify keyway dimensions before ordering.

Replaces Part Number(s):

A-WK28-AI, WK28

New aftermarket replacement part - not remanufactured, not used.