Genie 086446.3620.S Models J / H / GH Sprocket Assembly, #50-36T, 1-1/4" (Optional)
The Genie 086446.3620.S is a factory replacement #50 roller chain sprocket assembly for Genie commercial gate and door operators Models J (Jackshaft), H (H-Rail trolley), and GH (Gear Head Hoist). This variant features 36 teeth with a 1-1/4 inch bore diameter, designed to mate with #50 roller chain (5/8 inch pitch). The 1-1/4 inch bore accommodates the specific shaft diameter found on qualifying J, H, and GH operator drive assemblies. Selection of the correct tooth count allows the installer to configure the appropriate drive ratio for the gate weight, travel distance, and desired cycle speed of the application. Genie offers this same 1-1/4 inch bore sprocket family in five tooth counts (31T, 36T, 40T, 48T, and 60T) to cover the full range of commercial gate operator drive requirements.
Key Features
- #50 roller chain compatibility with 5/8 inch pitch for reliable high-load power transmission
- 36-tooth configuration delivers increased torque output compared to lower tooth-count variants in the same family
- 1-1/4 inch bore sized to match Genie J, H, and GH operator output shafts
- Mid-range speed-to-torque ratio suitable for moderate-duty gate cycle applications
- Part of a matched sprocket family spanning 31T to 60T for flexible drivetrain tuning
- OEM replacement assembly ensures dimensional accuracy and chain alignment for Genie commercial operators
Compatibility Guide
- Genie Model J Jackshaft Gate Operator
- Genie Model H H-Rail Trolley Gate Operator
- Genie Model GH Gear Head Hoist Gate Operator
Professional Specs
| Feature | Specification |
|---|
| Model | Genie 086446.3620.S |
| Item Type | Sprocket Assembly |
| Dimensions | 1-1/4 inch bore; #50 chain pitch 5/8 inch; 36 teeth |
| Mounting | Shaft-mount, 1-1/4 inch bore |
| Alternate Part Numbers | 086446-3620-S, 0864463620S |
Frequently Asked Questions
Q: What chain standard does this sprocket use?
A: This sprocket is designed for #50 roller chain, which has a 5/8 inch pitch. Using any other chain pitch will result in improper meshing, accelerated wear, and potential drivetrain failure.
Q: How does the 36-tooth count affect gate operator performance?
A: A 36-tooth sprocket provides a mid-range gear reduction compared to smaller-tooth variants such as the 31T. It delivers more torque and slower gate travel speed relative to the 31T, while still providing faster operation than the 40T, 48T, or 60T options in this family.
Q: Are other tooth-count variants available with the same 1-1/4 inch bore?
A: Yes. This sprocket family is available in 31T, 36T, 40T, 48T, and 60T configurations, all sharing the 1-1/4 inch bore and #50 chain standard. Select a higher tooth count for more torque and slower speed, or a lower tooth count for faster speed and less torque.
Q: How do I confirm this bore size is correct for my operator?
A: The 1-1/4 inch bore dimension must match the output shaft diameter of your specific Genie J, H, or GH operator. Verify your operator shaft size before ordering to ensure proper fit without adapter bushings.
Q: When should this sprocket be replaced?
A: Inspect the sprocket teeth for hooked or shark-fin wear, check the bore and keyway for wallowing or cracks, and replace if the chain skips or exhibits excessive slack that re-tensioning cannot correct. Always replace the mating roller chain at the same time as the sprocket.
