Description
WPDS D+S Cast Iron Worm Reducer — Product Overview
The WPDS is the most compact overhead motor drive variant in the WP series. The D-type split housing delivers in-situ maintenance access — remove the top cover with the motor still mounted. The S-type top-entry IEC flange eliminates both the adaptor plate and the lateral motor projection of standard side-entry configurations. Together, these two features minimise the total installed drive height while providing the lowest maintenance downtime.
With the motor mounting directly overhead and the split cover opening independently, WPDS installations in pit-mounted drives, space-constrained pump stations, and overhead conveyor head frames achieve an installed height that no other single-unit configuration can match.
WPDS Worm Reducer Specifications
| Parameter | Specification |
|---|---|
| Series | Single Speed |
| Housing Structure | D-type split cast iron |
| Input Configuration | IEC motor flange, top entry (D+S combination) |
| Output Configuration | Solid shaft, horizontal |
| Reduction Ratio | 1/5–1/60 |
| Centre Distance | 40–250 mm |
| Mounting | Foot-mount, D-split, S-top IEC input |
| Housing Material | FC20+ grey cast iron (GG20) |
| Worm Wheel Material | Tin-bronze ZCuSn10Pb1 |
| Worm Shaft Material | 20CrMnTi, 55–60 HRC surface |
| Lubrication | N220–N320 (−30°C–40°C); N320–N460 (40°C–65°C) |
| Max Oil Temperature | 95°C continuous |
| Weight Range | 5–396 kg |
| Special Feature | D+S: split housing + top-entry IEC flange — minimum overhead drive height |
Size & Performance Data
| Size | Ratio | Input Power (kW) | Output Torque (Nm) | A (mm) | AB (mm) | B (mm) | BB (mm) | Weight (kg) |
|---|---|---|---|---|---|---|---|---|
| 40 | 1/5 | 0.12 | 4–20 | 135 | 75 | 74 | 40 | 5 |
| 50 | 1/5 | 0.18 | 6–35 | 151 | 83 | 97 | 50 | 8 |
| 60 | 1/5 | 0.37 | 11–73 | 167 | 91 | 112 | 60 | 11 |
| 70 | 1/5–1/10 | 0.37–0.75 | 23–70 | 200/202 | 109/111 | 131 | 70 | 17 |
| 80 | 1/5–1/10 | 0.75–1.5 | 43–154 | 225 | 125 | 142 | 80 | 22 |
| 100 | 1/5–1/15 | 1.5 | 58–344 | 280 | 148 | 169 | 100 | 38 |
| 120 | 1/5–1/25 | 2.2–3.0 | 72–521 | 333 | 181 | 190 | 120 | 64 |
| 135 | 1/5–1/30 | 3.0–4.0 | 122–690 | 375 | 202 | 210 | 135 | 85 |
| 155 | 1/5–1/60 | 5.5 | 145–1260 | 448 | 247 | 252 | 155 | 118 |
| 175 | 1/5–1/60 | 5.5–7.5 | 210–1450 | 481 | 262 | 255 | 175 | 165 |
| 200 | 1/5–1/60 | 11.0 | 623–2856 | 543 | 285 | 319 | 200 | 236 |
| 250 | 1/5–1/60 | 11.0–15.0 | 850–3025 | 615 | 330 | 385 | 250 | 396 |
WPDS Worm Reducer — Core Features
■ S-Type IEC Flange — Motor Directly Overhead
Top-entry IEC flange eliminates the lateral motor projection of side-entry A-type configurations. Combined with the compact foot-mount base, WPDS achieves the minimum possible overhead drive footprint.
■ D-Split Housing — Cover Off While Motor Stays
The two-piece cast iron housing splits independently of the IEC motor flange joint. Remove the top cover for worm wheel inspection without disconnecting or repositioning the motor.
■ No Adaptor Plate — Motor Bolts Directly On
The IEC 72-1 flange machined into the housing eliminates the motor adaptor component from the BOM. Four bolts connect motor to reducer — the complete motor installation process.
■ Output Torque to 3,025 Nm — Same as WPDA
The WPDS worm gear internals are identical to the WPDA. D+S input configuration does not reduce output torque — size 250 still reaches 850–3,025 Nm at 1/5–1/60 ratio.
■ FC20+ Cast Iron for Wet & Harsh Environments
Overhead pump and pit installations in water treatment and chemical processing benefit from cast iron’s corrosion resistance advantage over aluminium in damp or splash-prone environments.
■ Weight 5–396 kg Across 12 Sizes
From 5 kg (size 40) for compact mechanism drives to 396 kg (size 250) for heavy industrial applications — the full industrial drive power range in a single WPDS product series.
WPDS Worm Reducer — Industry Applications
⚔ Water Treatment & Pit-Mounted Drives
In treatment plant pit installations where lateral space is the binding constraint, WPDS overhead motor positioning and compact split housing make the difference between a standard unit and a custom fabricated solution.
⚙ Pump Station Vertical Drives
Top-entry IEC flange and compact housing reduce total pump station drive height in above-floor installations, enabling tighter equipment spacing and wider aisle clearance on shared base frames.
⚊ Grain Elevator Head Frames
Limited clearance above elevator head frames is a common constraint. WPDS overhead motor reduces the required headroom by eliminating the side-projection of the motor from the drive envelope.
⚒ Chemical Agitator Drives
Overhead motor keeps all electrical connections away from chemical splash zones at the agitator shaft level. D-split cover enables annual inspection without any electrical disconnection.
Ever Power Manufacturing Quality — WPDS Worm Reducer
■ ISO 9001:2000 Certified
Every unit is manufactured under ISO 9001:2000 quality management. Raw material inspection, in-process checks, and final testing are all documented and traceable to each unit’s serial number.
■ CE Marking — EU Machinery Directive 2006/42/EC
Full CE compliance confirms adherence to European safety and design standards for mechanical power transmission, supporting export to EU, UK, Australian, and New Zealand markets.
■ Pre-Shipment Testing: Noise, Leak, Torque
Every unit passes three tests before shipping: noise below 68 dB(A) at rated load, 30-minute pressurisation leak test, and torque transmission within ±5% of rated value. Non-conforming units are reworked — not shipped.
■ FC20+ Material Certification
Housing castings are verified by mill certificates for FC20 grade: minimum 220 MPa tensile strength, 160–200 HB hardness. Ultrasonic defect testing is performed on size 135 and above.
WPDS Worm Reducer — Customer Reviews
“WPDS on our water treatment paddle mixer drives. Overhead IEC motor keeps the unit compact for pit installation. D-split cover removes easily for annual inspection without motor removal — very practical.”
“Used WPDS-120 on our chemical dosing pump drives. Most compact overhead motor drive I’ve used. Motor bolts on in 10 minutes, split housing open for worm wheel check in another 10. Excellent design.”
“WPDS drives our grain elevator head shaft. Top-entry IEC input reduced the overall drive height by over 200 mm versus previous configuration. Fit in the headroom we had available.”
“Good performance on our packaging conveyor drives. WPDS gives us vertical motor and split maintenance access in one unit. Would like to see a size between 80 and 100 in the range.”
Frequently Asked Questions — WPDS Worm Reducer
Get Your WPDS Quote Today
Tell Ever Power your application requirements — torque, ratio, mounting, and shaft dimensions. Engineering response within 24 hours. OEM custom specifications, bulk pricing, and global shipping available.
