Value Collection MP31952-1 Woodruff Key Steel 10 Pack

Product Description

The VALUE COLLECTION MP31952-1 is a No. 406 standard Woodruff key used to secure rotating components such as pulleys, gears, and sprockets to shafts. Machined from steel, this half-moon shaped key seats into a mating keyway to prevent rotational slippage between a shaft and hub. Each key measures 3/4 inches in length and 1/8 inches in width, conforming to USA Standard No. 406 dimensions. This listing includes 10 keys per pack. Machinists, millwrights, and mechanical technicians keep Woodruff keys on hand for routine shaft-to-hub assembly and repair work across industrial, HVAC, and mechanical equipment applications.

No. 406 Woodruff keys are a common fastening component in rotating machinery. They are used in equipment such as pumps, blowers, compressors, motors, and gear reducers where a shaft and hub must be keyed together to transmit torque. The 3/4 inch by 1/8 inch profile is a widely used standard size suited to light-to-medium duty shaft assemblies. A 10-piece pack provides enough quantity for job-site stocking or small-batch production work.

Key Features

• Conforms to USA Standard No. 406 Woodruff key dimensions
• Steel construction for reliable torque transmission in shaft-to-hub assemblies
• 3/4 inches long by 1/8 inches wide half-moon profile
• Pack of 10 keys for job-site or shop inventory
• UNSPSC Code 31163207 for procurement and cataloging systems

Compatibility

Designed as a standard No. 406 Woodruff key replacement for any shaft and hub assembly requiring a 3/4 inch by 1/8 inch half-moon key, including motors, pumps, blowers, and similar rotating equipment with a matching keyway.

Installation Notes

Woodruff keys are typically installed by machinists or mechanical technicians using a rubber mallet or arbor press to seat the key fully into the shaft keyway before pressing or sliding the hub into position. Always de-energize and lock out the equipment before disassembling any shaft-mounted component. Verify the keyway dimensions match the key profile before installation to avoid a loose or interference fit. Follow applicable machinery safety standards and equipment manufacturer procedures during assembly.