The Genie 075004.0007.S is an OEM sprocket assembly designed for use on Genie MH (Medium H-rail) and MJ (Medium Jackshaft) commercial door operators, fitted for ANSI #41 roller chain (0.500 in pitch). This variant features a 60T, 1-inch bore configuration. Selecting the correct tooth count and bore diameter is critical: an incorrect tooth count will produce the wrong gear ratio, and an incorrect bore diameter will not fit the operator shaft. The MH/MJ series uses #41 chain and is not interchangeable with the J/H/GH series which uses #50 chain. Sold as one sprocket assembly (each).
A: This sprocket is designed for #41 ANSI roller chain, which has a 0.500 inch pitch. Using any other chain pitch will result in improper meshing and accelerated wear.
A: The 075004.0007.S has a 1-inch bore. A closely related variant, 086654.6020.S, is also a 60-tooth #41 sprocket but carries a 1-1/4 inch bore. Installing the wrong bore diameter onto a shaft will result in improper fit and potential damage.
A: The 075004.0007.S is specified for Genie MH and MJ series commercial door operators. Confirm shaft diameter and chain pitch before ordering to ensure compatibility.
A: The sprocket tooth count directly affects the drive ratio between the motor shaft and the door. A 60-tooth driven sprocket paired with a smaller drive sprocket produces a speed reduction and torque multiplication appropriate for heavy commercial door applications.
A: Verify the driven shaft diameter is 1 inch, the existing or replacement chain is #41 ANSI (0.500 inch pitch), and the operator model is MH or MJ series before purchasing. Substituting the 1-1/4 inch bore variant on a 1-inch shaft will cause excessive play and unsafe operation.
[ITEMPRICE]
