The Genie 086446.3116.S is an OEM sprocket assembly designed for use on Genie J (Jackshaft), H (H-rail), and GH (next-gen H-rail) commercial door operators, fitted for ANSI #50 roller chain (0.625 in pitch). This variant features a 31-tooth drive sprocket with a 1-inch bore diameter. Selecting the correct tooth count and bore diameter is critical: an incorrect tooth count produces the wrong gear ratio, and an incorrect bore diameter will not fit the operator shaft. The J/H/GH series uses #50 chain and is NOT interchangeable with the MH/MJ series which uses #41 chain. Sold as one sprocket assembly (each).
A: This sprocket is designed for #50 ANSI roller chain, which has a 0.625-inch pitch. Using #41 or #40 chain with this sprocket is not recommended as the pitch dimensions differ and will cause premature wear or failure.
A: The bore diameter for this sprocket assembly is 1 inch. Verify your operator drive shaft measures 1 inch before ordering to ensure proper fit without the need for bushings or adapters.
A: This sprocket assembly is specified for Genie J, H, and GH series commercial door operators. If you are unsure of your operator model, check the nameplate on the operator head for the model designation before ordering.
A: The 31-tooth count on this sprocket affects the mechanical advantage and door speed. A higher tooth count on the drive sprocket relative to the driven sprocket will increase torque and reduce speed, which is relevant when configuring cycle speed for your door application.
A: Steel is the standard construction material for commercial-duty ANSI #50 sprockets in this product family. For high-cycle or corrosive environments, inspect the sprocket periodically for wear on the tooth flanks and replace if tooth profile shows hooking or thinning.
