Step Key Stock

How do you cut key stock?

Shaft keys, also known as machine keys, can be cut from key material using cut-off discs, hack saws or saws. They can be filed to the correct shape & fitting for in-field applications.

How to use step keys?

• Type I: The keyway sidewalls of the hub assembly are substantially damaged. To fix the broken hub, the keyway is broached to a larger size. Then, the misaligned keyways are filled with a Type I step key.
• Type II: The keyway sidewalls of the shaft are substantially damaged. To fix the broken hub, the shaft keyway is broached to a larger size. Then, for the curvation of the shaft, the misaligned keyways are filled with a Type II step key.

How to remove a stuck key from a shaft?

• End Cutting / Side Cutting Pliers: They are used to securely grab the exposed machine key and allow the jaws' cutting edge to grip the key. Start pulling up while also shaking the key back and forth. Continue doing so until the key pops out of the keyway.
• Adjustable Locking Pliers: Similar to side cutting or end cutting pliers, they are adjusted to securely grip the lock & key in place, but with much more strength. Rock the key back and forth until the key is released from the keyway.
• Slide Hammers with Locking Plier Attachment: Attach the machine key firmly to the movable locking pliers. Fasten the locking pliers to the slide hammer, and start moving the weight up the shaft while striking the stop. Repeat this until the machine key releases.
• Chisels / Hammers / Punches: Place the punch or chisel at the machine key's end. To release the machine key, whack the punch / chisel with a hammer. Place a punch at one end of a woodruff key and strike the punch downward to drive the key's end into the shaft. The key can glide into the slot owing to the half-moon shape, which forces the opposing end up.
• Welder & Slide Hammers: Attach the machine key to a bolt / pin by welding it. Fasten a slide hammer to the extrusion and start advancing the weight up the shaft while striking the stop. This force transfer shakes the key loose, as does the heat produced by welding.