171377 - Miller 171377 Replacement Drive Roll Knob

Replacement Drive Roll Knob for Miller Wire Feeders (171377)

Maintain the integrity of your wire feeding mechanism with the 171377 Drive Roll Knob. This component is a direct replacement for the retention knob found on many Miller Electric wire feeders and MIG welding machines. The drive roll system is the heart of any MIG welder, and the knob is responsible for applying the necessary axial pressure to keep the drive rolls locked onto the drive shaft. Without a secure knob, drive rolls can wander or slip, leading to erratic wire feeding, burn-backs, and frustration for the welder.

This part is widely compatible with Miller's extensive lineup of equipment. It fits the wire drive assemblies found in machines such as the Millermatic 210, 212, 250, 251, 252, and 350P, as well as the SuitCase X-Treme 8VS and 12VS feeders. The knob is designed with a specific thread pitch to match the Miller drive shafts perfectly, ensuring a secure hold that won't vibrate loose during operation. Its ergonomic design allows for sufficient torque to be applied by hand, facilitating rapid setup changes when swapping between solid wire V-groove rolls and flux-cored knurled rolls.

Constructed from robust materials, this knob resists cracking and stripping, common issues with inferior aftermarket parts. For professional fabricators and MRO specialists, maintaining the condition of your wire feeder is non-negotiable. Replacing a worn knob is a simple, low-cost maintenance task that pays dividends in reliability. Don't let a small plastic part compromise your welding projects; ensure your machine is equipped with a proper 171377 Drive Roll Knob.

Compatibility Checklist

• Millermatic Series (210, 212, 250, 251, 252, 300, 350)
• SuitCase Series Feeders (8VS, 12VS, X-Treme)
• Select 22 and 24 Series Wire Feeders
• 70 Series Wire Feeders