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WPEX Double Speed Cast Iron Worm Reducer — Product Overview
The WPEX is the double-stage counterpart to the single-stage WPX: X-type vertical downward output for ceiling and inverted installations, extended to ratios 1/200–1/900+ by the dual worm stage architecture. Overhead mining conveyor drives running below 5 rpm, sub-floor mechanism drives, and ceiling-mounted gravity-assist systems requiring extreme ratios use WPEX where no single-stage overhead reducer can deliver the required output speed.
WPEX Double Speed Worm Reducer Specifications
| Parameter | Specification |
|---|---|
| Series | Double Speed WPE+X |
| Housing | Solid integral cast iron, dual-stage |
| Input | Solid shaft — horizontal, bilateral |
| Output | Solid shaft — vertical downward (X-type) |
| Ratio Range | 1/200–1/900+ |
| Size Combinations | 40–70 to 155–250 mm |
| Mounting | Inverted/ceiling foot-mount, X-type vertical downward output |
| 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 | 19–442 kg |
| Key Feature | Double-stage + X vertical downward output — extreme ratio for inverted/overhead drives |
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 | 0.48 | 250 | 286 | 195 | 153 | 131 | 20 |
| 50–80 | 1/300 | 0.65 | 350 | 297 | 197 | 144 | 142 | 27 |
| 60–100 | 1/400 | 0.95 | 500 | 363 | 231 | 175 | 169 | 44 |
| 70–120 | 1/500 | 1.64 | 840 | 408 | 256 | 193 | 190 | 73 |
| 80–135 | 1/600 | 2.5 | 1,400 | 471 | 298 | 226 | 210 | 101 |
| 100–155 | 1/800 | 3.69 | 2,100 | 555 | 354 | 269 | 252 | 144 |
| 120–175 | 1/900 | 5.09 | 3,050 | 568 | 379 | 287 | 255 | 201 |
| 135–200 | 1/900+ | 7.22 | 3,950 | 662 | 425 | 318 | 319 | 293 |
| 155–250 | 1/900+ | 11.71 | 6,050 | 795 | 510 | 380 | 385 | 462 |
WPEX Double Speed Worm Reducer — Core Features
■ X-Type Downward Output + Double Stage — Extreme Ratio Ceiling Drive
The WPEX combines X-type vertical downward output with two-stage extreme ratio reduction — providing ratios 1/200 to 1/900+ in a ceiling-mount or inverted installation. Applications requiring output speeds below 10 rpm from an overhead drive unit use WPEX where a single-stage WPX would only reach 1/60.
■ Same 6,050 Nm Output Torque as WPEA
X-type output does not affect dual-stage torque capacity. WPEX size 155–250 delivers 6,050 Nm.
■ Oil Circuit for X-Type Inverted/Downward Orientation
Both chamber oil volumes are adjusted for X-type inverted orientation. Use the WPEX lubrication table for correct volumes in ceiling/inverted mounting.
■ Bilateral Horizontal Input — Motor from Either Side
Horizontal bilateral input shaft retained in X-type configuration — motor connects from either side of the ceiling-mounted housing.
■ FC20+ Dual-Chamber Cast Iron — Inverted Load Stability
Cast iron housing maintains dimensional stability under the sustained inverted load of ceiling-mount installation. Dual-chamber design maintains inter-stage alignment at operating temperature.
■ Independent Oil Chambers — Both Stages
Two independent sealed chambers with separate fill, gauge, and drain — each maintained independently on 2,500-hour intervals.
WPEX Worm Reducer — Industry Applications
⚊ Overhead Mining Conveyor Slow Drives
WPEX ceiling-mount with X-type downward output drives mining conveyor head shafts at ultra-slow speeds (below 5 rpm) directly from a standard motor — eliminating the VFD that single-stage ceiling drives require for comparable speeds.
⚒ Sub-Floor Mechanism Drives
Extreme-ratio ceiling-mounted drives for sub-floor conveyor mechanisms and under-floor turntable drives use WPEX downward output shaft to reach the driven equipment below the mounting structure.
☵ Ceiling-Mounted Gravity-Feed Controls
Overhead X-type slow drive for gravity-feed gate and hopper control mechanisms requiring ultra-slow, high-torque operation from a compact ceiling-mount unit.
⚛ Overhead Process Line Positioning
Industrial positioning systems requiring ceiling-mount drive units at extreme ratios for indexing, scanning, and inspection system overhead drives use WPEX for the combination of inverted mounting and extreme ratio.
Ever Power Manufacturing Quality — WPEX Worm Reducer
■ ISO 9001:2000 — Dual-Stage Assembly Certified
Both worm stage assemblies are manufactured and tested under ISO 9001:2000. Inter-stage alignment and ratio accuracy are verified before final assembly of every unit.
■ CE Marking — EU Machinery Directive 2006/42/EC
Full CE compliance for 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 of both gear chambers, and output torque within ±5% of rated. Non-conforming units reworked before shipment.
■ FC20+ Material Certification
Both housings carry FC20 mill certificates: 220 MPa minimum tensile strength, 160–200 HB hardness. Ultrasonic testing on size combinations 135–200 and above.
WPEX Double Speed Worm Reducer — Customer Reviews
“WPEX ceiling-mounted on our mining conveyor overhead drives. X-type downward output shaft connects directly to the conveyor head shaft below. 1/600 ratio from a standard motor — no VFD needed.”
“Used WPEX on sub-floor conveyor mechanism drives. Double-stage at 1/500 with downward output shaft through the floor structure. Clean installation with no external coupling below the mounting frame.”
“WPEX on our ceiling-mounted gravity feed gate drives. 1/800 ratio, 2,100 Nm output, vertical downward shaft to the gate mechanism. Reliable slow-speed control from a compact overhead unit.”
“Good double-stage inverted drive. WPEX-80–135 on our overhead process line indexing drives. Extreme ratio, vertical downward output, correct torque. Would appreciate D-split maintenance access variant.”
Frequently Asked Questions — WPEX Double Speed Worm Reducer
Get Your WPEX 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.
