The Blodgett 6138 Oven Blower Wheel is an 8-1/2-inch diameter, 2-1/8-inch wide concave wheel with a 5/8-inch center hole and counterclockwise rotation. It circulates heated air through compatible commercial oven chambers to support even heat distribution during cooking. The assembly includes a puller hub, two set screws, and a keyway for securing the wheel to the motor shaft. It is associated with Blodgett CTB ovens and is also listed for certain Garland and Hobart equipment. This blower wheel can be referenced when servicing an oven affected by vibration, restricted airflow, damaged blades, or a worn hub.