Carlson Power-Flo B-4238 Clutch Brake Assembly

Carlson Power-Flo B-4238 Clutch Brake Assembly is a Power Flo industrial clutch/brake unit designed for power-transmission systems where a single device can function as either a clutch or a brake depending on how it is mounted and used. It employs the Power Flo inner-outer torque plate assembly with friction surfaces on the outer plates to engage or release torque between rotating components, a common design across Carlson’s Power Flo clutch/brake line. The B-4238 designation identifies this specific model, with a bore size listed as 1-27/64 inches (ID ≈ 1.421875 in), a critical spec for shaft compatibility. Carlson manufactures Power Flo clutches and brakes in the United States (Wichita, Kansas) and sells them worldwide through an authorized distributor network; the Power Flo branding has historical roots as Carlson’s clutch/brake line. This particular model sits within Carlson’s broader Power Flo family, which encompasses a range of clutch/brake assemblies used in diverse industrial applications where precise engagement and controlled braking are required.