The Genie 086446.1716.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 17-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 uses #50 ANSI roller chain, which has a 0.625 inch pitch. Do not substitute #41 or #40 chain, as the tooth profile and pitch are not interchangeable.
A: The bore diameter is 1 inch. Verify your operator output shaft measures 1 inch before ordering, as other variants in the 086446 series are available with different bore sizes.
A: With 17 teeth this is the smallest-tooth sprocket in the J/H/GH #50 family, producing the highest gear ratio and the greatest mechanical advantage for moving the door. Larger-tooth sprockets run at a higher door speed with less mechanical advantage.
A: The 086446.1716.S is designed for Genie J, H, and GH series commercial trolley and jackshaft operators. Confirm your specific model accepts a #50 chain drive before installation.
A: The .S suffix in 086446.1716.S designates the specific variant - in this case the sprocket assembly. Other suffixes in the 086446 series may indicate different bore sizes or related hardware. Always order by the full part number to ensure the correct variant.
