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WPEDS Double Speed Cast Iron Worm Reducer — Product Overview
Single-stage worm reducers achieve ratios up to 1/60. When applications demand 1/200, 1/500, or 1/900 — solar trackers, valve actuators, slow-speed conveyors, and positioning drives — a second worm stage is the engineering answer. The WPEDS places two matched worm stages in tandem in a single cast iron housing, delivering ratios from 1/200 to over 1/900 in one compact, foot-mount unit with no intermediate shafting, no external coupling between stages, and no additional mounting frame.
IEC motor flange at the S-type overhead position enables direct motor mounting above the dual-stage housing. No adaptor … The dual-stage architecture uses matched tin-bronze worm wheels and 20CrMnTi worm shafts at both stages, providing consistent mesh quality and noise performance across the full ultra-high ratio range.
WPEDS Double Speed Worm Reducer Specifications
| Parameter | Specification |
|---|---|
| Series | Double Speed WPED+S |
| Housing | D-type split cast iron, dual-stage |
| Input | IEC motor flange, S-type overhead |
| Output | Solid shaft, horizontal |
| Ratio Range | 1/200–1/900+ |
| Size Combinations | 40–70 to 155–250 mm |
| Mounting | Foot-mount, D-split, S-type IEC overhead |
| Housing Material | FC20+ grey cast iron, dual-chamber |
| Worm Wheels | Matched pair tin-bronze ZCuSn10Pb1, both stages |
| Worm Shafts | 20CrMnTi case-hardened 55–60 HRC, both stages |
| Lubrication | N220–N320 (−30°C–40°C); N320–N460 (40°C–65°C), both chambers |
| Max Oil Temp | 95°C continuous |
| Weight Range | 19–470 kg |
| Key Feature | D-split + S overhead IEC flange + double-stage — motorised overhead ultra-high ratio drive with in-situ maintenance |
Size Combination & Performance Data
| Size Combo | Ratio | Input (kW) | Output Torque (Nm) | A (mm) | AA (mm) | AB (mm) | BB (mm) | Weight (kg) |
|---|---|---|---|---|---|---|---|---|
| 40–70 | 1/200 | 0.12 | 63–177 | 314 | 153 | 131 | 75 | 19 |
| 50–80 | 1/300 | 0.18 | 97–252 | 314 | 144 | 142 | 83 | 27 |
| 60–100 | 1/400 | 0.37 | 195–561 | 387 | 175 | 169 | 91 | 45 |
| 70–120 | 1/500 | 0.75 | 384–1,166 | 425/445 | 193 | 175 | 109/111 | 75 |
| 80–135 | 1/600 | 1.5 | 616–1,811 | 499 | 226 | 210 | 125 | 103 |
| 100–155 | 1/800 | 1.5 | 854–2,100 | 570 | 269 | 252 | 148 | 147 |
| 120–175 | 1/900 | 3.0 | 1,798–4,463 | 631 | 287 | 255 | 181 | 204 |
| 135–200 | 1/900+ | 4.0 | 2,188–5,830 | 630/680 | 318 | — | 202 | 298 |
| 155–250 | 1/900+ | 5.5 | 2,841–9,066 | 815 | 380 | 385 | 247 | 470 |
WPEDS Double Speed Worm Reducer — Core Features
■ S-Type IEC Flange Overhead + Double Stage — Maximum Ratio from Direct Motor
IEC motor flange at the S-type overhead position enables direct motor mounting above the dual-stage housing. No adaptor plate between motor and first stage, no lateral motor projection — the most compact motorised ultra-high-ratio drive in the WPE series.
■ D-Split Housing — Dual-Stage Maintenance Access in Position
Top cover removes with motor mounted overhead and driven shaft connected. Both worm stage chambers accessible in-situ — no unit removal required for planned maintenance intervals.
■ Output Torque to 9,066 Nm — Same as WPEDA
WPEDS worm gear internals are identical to WPEDA. S-type IEC input direction does not reduce the dual-stage torque capacity — size 155–250 delivers up to 9,066 Nm.
■ Most Compact Overhead Motorised Ultra-High-Ratio Drive
Combining overhead IEC motor (S-type), split maintenance access (D-type), and two-stage extreme ratio in one housing achieves the minimum possible installed height and lateral width for a motorised reducer at ratios above 1/200.
■ Dual Independent Oil Chambers
Both gear stage chambers are independently sealed, independently filled, and independently drained. Separate oil condition monitoring per stage simplifies planned maintenance in long-interval applications such as solar and infrastructure drives.
■ FC20+ Dual-Chamber Housing — 20+ Year Service Life Capability
FC20+ cast iron dual-chamber housing maintains inter-stage alignment and dimensional stability across the extended service intervals required by infrastructure, renewable energy, and industrial automation applications.
WPEDS Worm Reducer — Industry Applications
☀ Overhead-Motor Solar Tracker + Maintenance Access
WPEDS combines overhead IEC motor (eliminating lateral drive projection on tracker frames) with D-split maintenance access — critical for solar installations where periodic inspection must occur in-situ on the mounting structure.
⚒ Compact Valve Actuator Drives with Service Access
In valve actuator applications where both minimal lateral projection and in-situ periodic inspection are required, WPEDS is the appropriate WPED series choice — overhead motor, extreme ratio, in-situ worm wheel access.
⚙ Automated Gate & Dam Sluice Drives
WPEDS motorised overhead configuration suits gate and sluice drives where the motor must be above the water level and periodic drive inspection must occur without removing the unit from the water control structure.
⚊ Industrial Automation Positioning Drives
High-ratio positioning drives for large rotary tables, industrial gantries, and automated handling systems benefit from WPEDS overhead IEC motor and in-situ split cover access for precision gear mesh inspection.
Ever Power Manufacturing Quality — WPE Double Speed Worm Reducer
■ ISO 9001:2000 Certified — Dual-Stage Assembly
Every WPE double speed unit undergoes ISO 9001:2000 quality management at both worm stage assembly levels. Inter-stage alignment and combined ratio accuracy are verified before final assembly.
■ CE Marking — EU Machinery Directive 2006/42/EC
Full CE compliance for mechanical power transmission equipment supports export to EU, UK, Australian, and New Zealand markets without re-certification.
■ Pre-Shipment Testing: Noise, Leak, Torque
Noise below 68 dB(A) at rated load, 30-minute pressurisation leak test on both gear chambers, and output torque within ±5% of rated. Non-conforming units reworked before shipment.
■ FC20+ Material Certification — Both Housings
Both the primary and secondary worm housings are verified by FC20 mill certificates: minimum 220 MPa tensile strength, 160–200 HB hardness. Ultrasonic defect testing on size combinations 135–200 and above.
WPEDS Double Speed Worm Reducer — Customer Reviews
“WPEDS on our solar tracker motorised drives. Overhead IEC motor keeps the drive assembly within the panel spacing constraint. D-split cover for in-situ inspection at the annual maintenance interval — critical for field-installed units.”
“Used WPEDS on our dam sluice gate drives. Motor overhead above water level, 1/900 ratio, 4,463 Nm output. D-split cover opens for inspection without removing the unit from the gate frame. Exactly the design we needed.”
“WPEDS on our compact automated gate positioning drives. Overhead IEC motor direct mount, split maintenance access in position — reduced planned downtime for our annual inspection schedule by 60% versus the previous drive arrangement.”
“Good overhead IEC + dual-stage combination. WPEDS-100–155 on our industrial turntable drives. Overhead motor, extreme ratio, in-situ access — all working as specified. Appreciate independent oil chambers.”
Frequently Asked Questions — WPEDS Double Speed Worm Reducer
Get Your WPEDS Quote Today
Tell Ever Power your application requirements — torque, ratio, mounting, and shaft dimensions. Engineering response within 24 hours. OEM specifications, bulk pricing, and global shipping available.
