Description
UY Series Torque-Arm Mounted Worm Gear Reducer
The UY Series is a shaft-mounted, torque-arm-restrained gear reducer built for installations where no rigid base plate or machine frame is available to bolt a conventional foot-mounted reducer. The hollow output bore slides over the driven shaft, and a single torque arm or reaction strap prevents the housing from rotating — creating a pendulum-style mount that inherently absorbs misalignment, thermal expansion, and vibration. This makes the UY the preferred right angle worm gearbox for conveyor head-pulley drives, agitator shafts, and crusher roll drives where the driven shaft is the only available mounting reference. Seven frame sizes from WP50 to WP135, ratios 5:1 to 60:1, and output torques up to 690 N·m cover the majority of shaft-mounted drive needs.
Where Torque-Arm Mounting Excels
Conveyor Head-Shaft Drives
Belt conveyors in quarries, distribution centres, and grain terminals often lack a rigid platform at the head pulley. The UY slides onto the head shaft, a V-belt from the motor drives the input pulley, and the torque arm bolts to the nearest structural member. This eliminates the motor base, coupling, and alignment work, cutting installation time in half compared with a traditional foot-mounted arrangement. Equipment integrators for Fenner Dunlop and Rulmeca conveyor platforms regularly specify the UY in the WP80–WP135 range.
Vibratory and Oscillating Equipment
Vibratory feeders, shaker screens, and oscillating conveyors impose cyclic shock loads on their drives. A rigidly foot-mounted reducer transmits these shocks into the housing bolts and bearings, accelerating fatigue. The UY’s pendulum mount decouples the reducer from high-frequency frame vibration, extending bearing life and reducing maintenance intervals. A rubber-bushed torque arm further dampens peak shock loads.
Specifications
Values apply at 1,500 r/min input. The UY uses the same WP-platform gear pair and bearings as the full single-stage speed reducer gearbox range. Hollow-bore diameters match the KA and DKA models per frame size. contact us for torque-arm dimensioning and mounting templates.
| Frame (mm) | Ratios | Torque at 10:1 (N·m) | Peak Torque (N·m) |
|---|---|---|---|
| WP50 | 5:1 – 60:1 | 9 | 35 |
| WP60 | 5:1 – 60:1 | 19 | 73 |
| WP70 | 5:1 – 60:1 | 39 | 95 |
| WP80 | 5:1 – 60:1 | 77 | 248 |
| WP100 | 5:1 – 60:1 | 80 | 344 |
| WP120 | 5:1 – 60:1 | 151 | 521 |
| WP135 | 5:1 – 60:1 | 219 | 690 |
Pendulum mount, hollow bore, and torque-arm attachment
Design and Construction
The UY housing is a one-piece grey cast-iron casting with a machined hollow output bore (H7 tolerance, parallel keyway) and a torque-arm lug cast integrally into the housing wall. The input side carries a solid shaft with keyway for belt or coupling attachment. All internal components — 20CrMnTi worm shaft, ZCuSn10Pb1 bronze wheel, tapered roller bearings, double-lipped NBR seals — are identical to every other WP single-stage model of the same frame size, maintaining full parts interchangeability.
Components and Spare Parts
Every wear component inside this reducer is available as an individual spare part from our Condell Park, NSW warehouse, enabling targeted replacement rather than full-unit swap. UY components are cross-compatible with KA, DKA, DA, and all other WP single-stage models of the same frame.
Worm Shaft
Case-hardened 20CrMnTi alloy steel, thread-ground Ra 0.8 μm
Worm Wheel
Centrifugally cast ZCuSn10Pb1 tin-bronze, full-depth involute
Bearings
Tapered roller bearings for combined radial and axial loads
Seal & Gasket Kit
Double-lipped NBR seals, gaskets, breather plugs, O-rings
Worm shaft, bronze wheel, bearings, and seal kits — all orderable separately
Customer Reviews
The UY torque-arm mount let us bolt the reducer directly to the saw-frame. No base plate, no foot pads, just the arm and two bolts. Frees up floor space and keeps the drive compact.
Aaron Walsh
Mechanical Foreman, Timber Mill
We integrate the UY into our shrink-wrapper using the torque-arm reaction. It hangs off the drive shaft and the arm stops it spinning. Compact and easy to service.
Jessica Tan
OEM Design Lead, Packaging Machinery
Replaced an old foot-mounted reducer with the UY on our vibrating feeder drive. The torque-arm mount absorbed the vibration better than the old rigid foot base. Running smoother.
Martin Lloyd
Maintenance Tech, Quarry
Lubrication
Use ISO VG 220–320 EP gear oil. Because the UY may oscillate slightly on its torque arm during operation, verify the oil level after the first hour of running and top up if needed. First change at 100 hours, then every 2,500 hours or annually.
Source from Ever-Power Australia
We stock UY frames and torque-arm kits at our Condell Park, NSW warehouse. Every unit ships with ISO 9001 documentation, factory oil, and a standard torque arm. We also supply S-series helical-worm combination reducer for helical-worm combination drives. Call +61 2 9708 3322 or email [email protected].
Ready-to-ship reducer stock
