Description
That loose pulley or slipping gear might seem like a major repair, but often it’s just a worn woodruff key causing the trouble. These precision-machined half-moon keys are the unsung heroes of power transmission, locking rotating parts to shafts and ensuring your tractor’s components turn as one unit. When they wear or shear, you lose drive to critical systems—but replacement takes just minutes with the right key.
What You’re Getting
- Semi-circular design prevents key from walking out of shaft slot
- Precision-machined for exact fit in Ford/New Holland keyways
- Heat-treated steel construction for optimal strength and durability
- Self-aligning design accommodates minor shaft wear
- Standard dimensions fit multiple shaft applications across your tractor
Built for Real Farm Work
Woodruff keys secure everything from PTO pulleys to hydraulic pump drives, fan hubs to alternator pulleys. Unlike square keys that can work loose and fall out, the curved design locks these keys securely in their machined slot. They’re especially common on auxiliary drives where components need to be removed for service—the key stays captive in the shaft, making reassembly foolproof.
Made to Last
Don’t let their simple appearance fool you—these keys are precision parts. The exact curvature matches the milled slot in your shaft, while the flat top provides full contact with the hub keyway. The proper material hardness ensures the key can handle normal loads but will shear before damaging shafts or hubs during overload conditions.
Installation Notes
These keys should seat fully in the shaft slot with the flat surface parallel to the shaft centerline. Never force a key—if it doesn’t fit easily, verify you have the correct size. Keep spare keys in your toolbox as they’re small, inexpensive insurance against downtime. A dab of grease helps hold the key in place during assembly, and if a key has sheared, always investigate why before installing a new one.
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