172075 - Miller 172075 Drive Roll Carrier Assembly with 24 Pitch Gear

Miller 172075 Drive Roll Carrier Technical Overview

The Miller 172075 is a specialized Drive Roll Carrier assembly designed to maintain the precise operation of wire feeding systems in industrial MIG welders. This component is engineered with 24 pitch gear teeth, a critical specification that ensures proper synchronization and torque transfer within the wire drive mechanism. It is the designated replacement part for a variety of high-performance Miller power sources and wire feeders, specifically the Millermatic 252, 250, and 250MP integrated systems.

Beyond the Millermatic series, this carrier is compatible with several standalone wire feeders, including the SWLR-115, SWLL-115, SWSR-115, SWSL-115, and SWLR-115E models. It also fits the Auto Arc Model 255 as well as I-22 and I-24 wire feeders. The carrier acts as the central hub that supports the drive rolls, allowing them to rotate smoothly while maintaining the necessary pressure on the welding wire. Over time, the gear teeth or the carrier body can suffer from wear due to the mechanical stress of feeding wire, leading to slippage or erratic feeding. Replacing this unit with a genuine Miller OEM part guarantees that the dimensional tolerances and material hardness meet the original factory specifications.

Installation of the 172075 carrier restores the mechanical integrity of the feed head. The assembly comes with the necessary components to seat the drive rolls correctly. When servicing a wire feeder, verifying the pitch of the existing components is essential; this unit is specifically for systems utilizing 24 pitch components. Using the correct carrier prevents damage to the mating gears and ensures a stable arc by delivering wire at a constant, uninterrupted speed.