Genie 086446.4820.S Models J / H / GH Sprocket Assembly, #50-48T, 1-1/4" (Optional)
The Genie 086446.4820.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 48 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 heavy-duty commercial gate drive systems
- 48-tooth configuration delivers increased mechanical advantage and reduced output speed compared to lower tooth-count variants
- 1-1/4 inch bore sized to match J, H, and GH series operator output or drive shaft diameters
- Part of a multi-ratio sprocket family allowing speed and torque tuning across 31T, 36T, 40T, 48T, and 60T options
- Designed as a direct OEM replacement assembly for Genie commercial gate operator drive trains
- Suitable for high-cycle commercial applications demanding reliable chain drive performance
Compatibility Guide
- Genie J Series Jackshaft Commercial Gate Operator
- Genie H Series H-Rail Trolley Commercial Gate Operator
- Genie GH Series Gear Head Hoist Commercial Gate Operator
Professional Specs
| Feature | Specification |
|---|
| Model | Genie 086446.4820.S |
| Item Type | Sprocket Assembly |
| Materials | Steel (sprocket and chain interface components consistent with #50 roller chain drive standards) |
| Dimensions | 1-1/4 inch bore, 48 teeth, #50 chain pitch (5/8 inch pitch) |
| Mounting | Keyed bore mount, 1-1/4 inch bore shaft interface |
| Alternate Part Numbers | 086446.4820.S |
Frequently Asked Questions
Q: Which Genie gate operator models is this sprocket assembly compatible with?
A: This sprocket assembly is designed for Genie J Series Jackshaft, H Series H-Rail Trolley, and GH Series Gear Head Hoist commercial gate operators that use #50 roller chain drive systems.
Q: What does the .S suffix in the part number mean?
A: The part number suffix .S indicates this is a specific variant within the 086446.4820 family, corresponding to the 48-tooth, 1-1/4 inch bore configuration. Always verify the full part number including suffix when ordering to ensure the correct tooth count and bore size.
Q: How does the 48-tooth count affect gate operator performance?
A: The 48-tooth sprocket provides a higher mechanical advantage and slower output speed compared to lower tooth-count sprockets such as 31T, 36T, or 40T in the same family. This makes it suitable for heavier gate loads or applications requiring more torque at reduced cycle speed.
Q: What chain specification is required for this sprocket?
A: This sprocket uses #50 roller chain, which has a 5/8 inch pitch. Ensure the mating drive sprocket and all chain used in the drive system are also rated for #50 chain to maintain proper engagement and load capacity.
Q: Are there other tooth-count options available in the same sprocket family?
A: Related sprockets in the same 086446 family with a 1-1/4 inch bore are available in 31T, 36T, 40T, and 60T configurations. Each provides a different speed-to-torque ratio for the same J, H, and GH operator platforms.
