Description
WA-WS Series Universal Worm Gear Reducer
The WA-WS Series pairs the universal multi-angle WP housing with two of the most popular input orientations: WA (input from below, A-type) and WS (input from above, S-type). Both variants use a bare input shaft for belt, chain, or coupling drive, and both share a single housing casting that can be reoriented on site if the motor position changes in the future. Thirteen frame sizes from WP40 to WP250, ratios of 5:1 to 60:1, and output torques up to 3,025 N·m match the performance of the fixed-orientation DA and DS models while adding the flexibility of a universal industrial gearbox platform.
Applications
Conveyor and Material-Handling Drives (WA)
Floor-level belt conveyors in warehouses, grain terminals, and recycling plants typically position the motor below the reducer. The WA orientation places the input shaft pointing downward, accepting a V-belt from a motor on the floor or a low-level bracket. This is the most common configuration for horizontal conveyor head-shaft drives, and the universal housing means the same unit can be rotated to S-type for future overhead-motor layouts without purchasing a new gearbox.
Tank-Top Agitators and Mixers (WS)
Vertical-shaft agitators in chemical reactors, blending tanks, and CIP vessels position the motor above the reducer on a bridge or platform. The WS orientation places the input shaft pointing upward, accepting a belt or coupling from the motor above. The self-locking worm gearbox property at 25:1 and above holds the impeller stationary during batch transfers.
Specifications
Values at 1,500 r/min, continuous duty. WA and WS share identical torque, efficiency, and bearing ratings. All dimensions conform to the speed reducer gearbox platform standards. contact us for drawings.
| Frame (mm) | Ratios | Torque at 10:1 (N·m) | Peak Torque (N·m) |
|---|---|---|---|
| WP40 | 5:1 – 60:1 | 6 | 20 |
| WP60 | 5:1 – 60:1 | 19 | 73 |
| WP80 | 5:1 – 60:1 | 77 | 248 |
| WP100 | 5:1 – 60:1 | 80 | 344 |
| WP135 | 5:1 – 60:1 | 219 | 690 |
| WP175 | 5:1 – 60:1 | 415 | 1,450 |
| WP250 | 10:1 – 60:1 | 850 | 3,025 |
A-type (input below) and S-type (input above) on universal housing
Construction
The WA-WS housing is the same one-piece grey cast-iron universal casting used for the W Series, with motor-mounting faces on six planes. The output is a solid dual-end shaft with foot pads on two perpendicular planes. All internal components are interchangeable with the DA, DS, KA, W, and every other single-stage WP model of the same frame size.
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. Full parts commonality with the entire WP single-stage family. One inventory covers WA, WS, DA, DS, KA, W, and more.
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
We standardised on the WA for all our conveyor drives. Motor below, belt-driven. The universal casting means we can swap to S-type if a future layout change puts the motor above. Smart investment.
Tom Richards
Plant Fitter, Grain Terminal
The WS top-entry fits our reactor agitators perfectly. Same parts as the WA but motor mounts above. Spares commonality across both orientations saves us inventory cost.
Nina Petrova
Equipment Buyer, Chemical Producer
WA WP100 at 25:1 on our CIP mixer. Self-locking holds the paddle during tank fill. The universal housing gave us future flexibility without paying for a custom unit.
Sam O’Reilly
Site Engineer, Dairy Processing
Lubrication
ISO VG 220–320 EP gear oil. WA (input below) uses the standard horizontal fill mark. WS (input above) may require a slightly higher fill to keep the upper bearing lubricated. First change at 100 hours, then 2,500 hours or annually.
Ever-Power Australia
We stock WA and WS across all frame sizes. We also supply PCNMRV pre-stage helical worm gearbox for helical-worm pre-stage needs. Condell Park, NSW. Call +61 2 9708 3322 or email [email protected].
Worm reducer CNC and assembly
