Miller Woodruff Key .156 x .625 Replacement Part

Get Your Welder Back to Work with Genuine Miller Parts

There is nothing more frustrating than a production halt caused by a small, inexpensive part failure. If your wire feeder has stopped feeding or a drive motor is spinning without turning the gears, you might be dealing with a sheared key. The Miller 250655 Woodruff Key is the exact replacement you need to fix the drive train on your Miller welding equipment and get back to laying beads. Sized at .156" x .625", this key is the small metal half-moon piece that locks your drive rolls or gears to the motor shaft.

Why stick with genuine Miller parts for something so simple? Fit and reliability. A key that is slightly too loose will cause "slop" in the drive system, leading to erratic wire feeding and eventually damaging the shaft itself—a much more expensive repair. A key that is too tight might require filing or hammering, which can damage the motor bearings. This OEM Miller key drops right into the slot, ensuring a tight, secure fit that restores your machine to factory performance levels instantly. It is built to handle the torque of industrial welding environments.

Woodruff keys like this one are often the unsung heroes of your welder. They are designed to take the abuse so your motor doesn't have to. If your machine hits a snag or the wire jams hard, this key may shear off intentionally to save your motor from burning out. Keeping a few of these 250655 keys in your maintenance kit is a smart move for any shop that relies on Miller wire feeders. It turns a potential day-ending breakdown into a five-minute fix.

Don't compromise on your equipment's longevity. Use the Miller 250655 to ensure your drive assembly runs smooth, true, and reliable. Check your welder's parts manual to confirm this is the correct size for your specific model, and order with confidence knowing you are getting the real deal.