300145 - Miller Shopmate 300 Running Gear with Dual Cylinder Rack

Industrial Mobility for the Shopmate 300

The Miller 300145 Running Gear is a specialized accessory engineered exclusively for the Shopmate 300 and Shopmate 300 DX power sources. In industrial environments where equipment flexibility is paramount, this running gear provides the structural integrity and mobility required to transport heavy welding power sources safely. Constructed from heavy-gauge steel, the undercarriage is designed to withstand the rigors of daily shop use, resisting deformation and wear associated with heavy loads.

A defining feature of this model is its integrated Dual Cylinder Rack. Many welding operations require multiple shielding gases—such as Argon for TIG and a CO2/Argon mix for MIG—or simply a backup cylinder to prevent downtime. This rack accommodates two full-size industrial gas cylinders side-by-side, securing them firmly with heavy-duty chains. This capability eliminates the need for separate cylinder carts or the dangerous practice of moving cylinders manually, thereby streamlining the workflow and enhancing shop safety compliance.

The wheel configuration is optimized for stability and maneuverability. The rear of the gear features large, durable rubber tires that absorb vibrations and roll easily over cables, cracks, or debris common on shop floors. The front is equipped with industrial-grade swivel casters, allowing the operator to pivot the machine in tight radius turns, making it ideal for crowded fabrication cells. The mounting system is precision-drilled to match the Shopmate 300 chassis, ensuring a secure, vibration-free connection between the power source and the cart. This is not a universal cart; it is a purpose-built solution that maintains the center of gravity low to the ground to prevent tipping, even when the heavy gas cylinders are loaded.

Installation is straightforward, utilizing the existing mounting points on the welder. The assembly includes a robust handle that provides excellent leverage for pushing or pulling the unit. By integrating the power source, gas supply, and mobility into a single unit, the Miller 300145 Running Gear significantly increases the versatility of the Shopmate 300 system.