Description
WDA-WDS Series Universal Motor-Flange Worm Gear Reducer
The WDA-WDS Series is the motor-flange-equipped counterpart of the WA-WS range: a universal-housing worm gear reducer with a B5/B14 IEC motor flange pre-machined on the most common input faces. WDA positions the motor below (A-type) and WDS positions it above (S-type), but the universal casting lets fitters switch between orientations on site by simply unbolting and repositioning the motor. This reorientation capability, combined with the bolt-on motor convenience and zero-coupling drivetrain, makes the WDA-WDS the most flexible single-stage drive package in the WP range. Thirteen frame sizes (WP40–WP250), ratios 5:1 to 60:1, output torques up to 3,025 N·m.
Versatile Applications
Floor-Level Conveyor Drives (WDA)
Belt and chain conveyors in distribution centres, mines, and food plants typically position the motor below the reducer on the floor or a low bracket. The WDA mounts with the motor flange pointing downward, and the motor bolts on directly — no coupling, no belt, no alignment ritual. Frame sizes WP80–WP175 cover the speed and torque range most conveyor head-shaft drives operate in. Equipment integrators for Interroll and Hytrol platforms use the WDA as their default right angle worm gearbox.
Top-Entry Machine Drives (WDS)
Case packers, palletisers, and shrink-tunnel drives in packaging lines often position the motor above the gearbox to keep the floor area clear for product flow. The WDS orientation places the motor flange above the worm centreline, and the output shaft drives horizontally into the machine mechanism. At 20:1 to 30:1, the self-locking worm gearbox property holds the mechanism during product changeovers.
Specifications
Data at 1,500 r/min, continuous duty. WDA and WDS share identical torque, efficiency, and bearing data. All dimensions match the speed reducer gearbox platform. contact us for full drawing packages.
| Frame (mm) | Motor (kW) | Ratios | Torque at 10:1 (N·m) | Peak Torque (N·m) |
|---|---|---|---|---|
| WP40 | 0.12 | 5:1 – 60:1 | 6 | 20 |
| WP60 | 0.37 | 5:1 – 60:1 | 19 | 73 |
| WP80 | 0.75 – 1.5 | 5:1 – 60:1 | 77 | 248 |
| WP100 | 1.5 | 5:1 – 60:1 | 80 | 344 |
| WP120 | 2.2 – 3 | 5:1 – 60:1 | 151 | 521 |
| WP155 | 5.5 | 5:1 – 60:1 | 270 | 1,260 |
| WP175 | 5.5 – 7.5 | 5:1 – 60:1 | 415 | 1,450 |
| WP250 | 11 – 15 | 10:1 – 60:1 | 850 | 3,025 |
Universal housing with A-type (below) and S-type (above) motor flange positions
Engineering Details
The WDA-WDS uses the same universal grey cast-iron housing as the W and WD models, with B5/B14 IEC motor flanges machined on six planes. The input bore is h6-tolerance with a parallel keyway. The output is a solid dual-end shaft with foot pads on two perpendicular faces. All internals — 20CrMnTi worm shaft, ZCuSn10Pb1 bronze wheel, tapered roller bearings, double-lipped NBR seals — are identical to every other single-stage WP variant of the same frame. An optional AS-type support bracket and TV-type motor bracket are available for installations with heavy motors or high-vibration environments.
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 across the entire WP single-stage range. One spare-parts order covers every housing variant.
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 WDA is our standard conveyor drive reducer. Motor bolts on below, universal housing means we can reposition later if the conveyor route changes. One SKU, every layout.
Patrick Nolan
Senior Fitter, Steel Works
We mount the WDS on our top-entry case packers. Motor above, output horizontal into the case-pusher chain. The universal housing future-proofs the design if a customer needs a different motor angle.
Laura Chen
Design Engineer, Packaging OEM
WDA WP80 at 20:1 on our auger-feed motors. Belt-free direct drive, self-locking for holding the auger during refills. Clean, compact, and the motor angle flexibility is a real bonus in our tight shed spaces.
James Barker
Maintenance Manager, Feedlot
Oil and Maintenance
ISO VG 220–320 EP gear oil. When switching from WDA to WDS orientation (or vice versa), re-check the oil level against the sight glass and adjust the fill quantity. Apply yellow grease to the motor flange input bore and keyway before installing the motor to prevent corrosion bonding. First oil change at 100 hours, then 2,500 hours or annually.
Source from Ever-Power Australia
Both WDA and WDS are in stock across popular frame sizes at our Condell Park, NSW warehouse. We also supply BGV055 compact worm gear reducer for compact light-duty drives. ISO 9001-certified, factory-tested, with Sydney-based engineering support. Call +61 2 9708 3322 or email [email protected].
Load testing and final inspection
