The PowerMaster J-71 Jackshaft Operator is a 3/4 HP, 115/230V, single-phase commercial door operator designed for sectional, rolling steel, and industrial overhead door applications. Built to provide strong torque output and dependable daily operation, the J-71 is ideal for commercial facilities requiring durable performance in a compact, shaft-mounted configuration.
Its single-phase motor makes it suitable for locations without 3-phase power, while still providing robust lifting capability for medium-duty to heavy-duty doors. The jackshaft design allows the operator to mount directly to the door shaft, making it especially effective in facilities with limited overhead clearance. Engineered with high-quality components, the J-71 is compatible with modern access control systems and UL-required safety devices.
