설명
WPS Single Speed Worm Gear Reducer with Cooling Fins — Thermally Optimised for Continuous Heavy-Duty Operation
When a drive system must operate at high duty cycles — multiple daily shifts, near-continuous running, or elevated ambient temperatures — heat management becomes the critical constraint. The WPS worm gear reducer directly addresses this challenge. Deep longitudinal cooling fins machined into the cast iron housing dramatically increase external surface area for natural convection cooling, reducing sustained operating temperatures by up to 15°C compared to a standard smooth-body unit of equivalent size.
This thermal advantage translates directly into longer lubricant life, reduced seal wear, and extended overhaul intervals — making the WPS the recommended choice for heavy-duty worm gear reducers in metallurgical, chemical, aggregate processing, and 24/7 production environments. Available in sizes 40–250 mm, nine ratios (1/5–1/60), and five shaft-direction positions. Visit our company page or request a free thermal assessment.
Technical Specifications
WPS shares the same base footprint as the WPA but with an increased housing height (H) to accommodate the extended fin array. Reference input speed 1500 r/min. All dimensions in mm.
| Size | Ratio | A | AB | B | BB | CC | H | HL | M | N | E | F | G | Z | HS | U | T×V | LS | S | W×Y | Wt(kg) | Oil(L) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 40 | 1/5–1/60 | 143 | 87 | 114 | 74 | 40 | 141 | 60 | 90 | 100 | 70 | 80 | 13 | 10 | 25 | 12 | 4×2.5 | 28 | 14 | 5×3 | 4 | 0.30 |
| 50 | 175 | 108 | 150 | 97 | 50 | 180 | 80 | 120 | 140 | 95 | 110 | 15 | 12 | 30 | 12 | 4×2.5 | 40 | 17 | 5×3 | 7 | 0.45 | |
| 60 | 198 | 120 | 168 | 112 | 60 | 207 | 90 | 130 | 150 | 105 | 120 | 20 | 12 | 40 | 15 | 5×3 | 50 | 22 | 7×4 | 10 | 0.55 | |
| 70 | 231 | 140 | 194 | 131 | 70 | 238 | 105 | 150 | 190 | 115 | 150 | 20 | 15 | 40 | 18 | 5×3 | 60 | 28 | 7×4 | 15 | 0.80 | |
| 80 | 261 | 160 | 214 | 142 | 80 | 268 | 120 | 170 | 220 | 135 | 180 | 20 | 15 | 50 | 22 | 7×4 | 65 | 32 | 10×4.5 | 20 | 1.10 | |
| 100 | 322 | 190 | 254 | 169 | 100 | 334 | 150 | 193 | 270 | 155 | 220 | 25 | 15 | 50 | 25 | 7×4 | 75 | 38 | 10×4.5 | 35 | 2.90 | |
| 120 | 371 | 219 | 282 | 190 | 120 | 423 | 180 | 233 | 320 | 180 | 260 | 30 | 18 | 65 | 30 | 7×4 | 85 | 45 | 12×4.5 | 60 | 4.40 | |
| 135 | 422 | 249 | 317 | 210 | 135 | 482 | 215 | 253 | 350 | 200 | 290 | 30 | 18 | 75 | 35 | 10×4.5 | 95 | 55 | 16×6 | 80 | 6.20 | |
| 147 | 432 | 256 | 320 | 210 | 147 | 460 | 203 | 250 | 350 | 200 | 280 | 32 | 18 | 75 | 35 | 10×4.5 | 95 | 55 | 16×6 | 98 | 3.70 | |
| 155 | 497 | 295 | 382 | 252 | 155 | 541 | 235 | 275 | 390 | 220 | 320 | 35 | 21 | 85 | 40 | 12×5 | 110 | 60 | 18×7 | 110 | 6.50 | |
| 175 | 534 | 314 | 388 | 255 | 175 | 600 | 260 | 310 | 430 | 250 | 350 | 40 | 21 | 85 | 45 | 14×5.5 | 110 | 65 | 18×7 | 150 | 8.00 | |
| 200 | 580 | 342 | 456 | 319 | 200 | 677 | 290 | 360 | 480 | 290 | 390 | 40 | 24 | 95 | 50 | 14×5.5 | 125 | 70 | 20×7.5 | 215 | 9.30 | |
| 250 | 703 | 420 | 552 | 385 | 250 | 824 | 350 | 460 | 560 | 380 | 480 | 45 | 28 | 110 | 60 | 18×7 | 155 | 90 | 25×9 | 360 | 18.0 |
* HL = overall height including fin array. Oil volume slightly higher than WPA due to increased housing capacity.
Product Structure & Cooling Fin Design
The WPS housing is identical in base geometry to the WPA, with the addition of integral longitudinal fins on the top and side faces. These fins are cast as part of the housing — not machined as a secondary operation — ensuring maximum thermal contact and eliminating risk of fin separation under vibration.
| Housing | FC25 grey cast iron with integral longitudinal cooling fins |
| Fin Effect | Up to +40% external surface area vs WPA; ~15°C lower steady-state oil temperature |
| Worm Shaft | 20CrMnTi carburised & ground, ≥58 HRC surface hardness |
| Worm Wheel | ZCuSn10Pb1 tin-bronze rim on ductile iron hub |
| Shaft Positions | 5 configurable orientations: A, B, C, D, E |
| Drop-in Fit | Same base footprint as WPA — thermal upgrade without machine modification |
✅ Key Features & Benefits
Integral Cooling Fin Architecture
Cast-integral fins increase external surface area by up to 40%, enabling natural convection cooling sufficient to eliminate external fans or cooling circuits even in compact plant rooms. Ideal for continuous-duty worm gearbox applications in hot climates.
Extended Lubricant & Seal Life
Lower steady-state oil temperature extends ISO VG 320 mineral oil change intervals, reduces oxidation and additive depletion, and dramatically slows NBR seal degradation — cutting total cost of ownership in shift-pattern manufacturing environments.
Rugged FC25 Cast Iron Body
Grey cast iron housing provides inherent vibration damping and outstanding impact resistance, making the WPS suitable for metallurgical facilities, crusher drives, and any application subject to shock or cyclic loading. Keywords: heavy-duty worm drive for metallurgy.
Precision Ground Worm Pair
Ground worm tooth profile mated with ZCuSn10Pb1 bronze wheel delivers low noise (≤72 dB(A)) and smooth torque transfer with efficiency up to 90% at 1/5 ratio — combining quiet running with energy efficiency even under heavy sustained loads.
Five Shaft-Direction Options
Standard positions A through E accommodate virtually any drive-train layout, simplifying integration into new designs and retrofits without structural modification — a crucial feature for multi-shift plants where downtime for drive realignment is unacceptable.
Drop-In Replacement for WPA
The WPS shares the identical base footprint and shaft dimensions with the WPA. It can be fitted as a like-for-like thermal upgrade on any machine currently using a WPA with no modifications to mounting plates or couplings.
Industry Applications
The WPS excels in high-thermal-load environments where a standard smooth-body gearbox would overheat:
Metallurgy & Rolling MillsSteel strip handling, bloom transfer tables, and rolling mill auxiliary drives operating in high-ambient-temperature plant rooms.
Aggregate & Crushing PlantsVibrating screen drives, crusher auxiliaries, and conveyor take-up units operating two or three shifts per day in hot, dusty environments.
Cement & Lime ProductionKiln auxiliary drives, bucket elevator drives, and clinker handling conveyors in thermally demanding cement plant environments.
Chemical & PetrochemicalContinuous stirred-tank reactor (CSTR) drives, pump drives, and valve actuators in process plants with elevated ambient temperatures.
24/7 Production LinesAutomotive parts, rubber, and glass manufacturing lines that run continuously where thermal stability is essential to maintaining product quality.
Power Generation AuxiliariesCooling tower fan drives, ash conveying systems, and coal feeder drives at thermal power stations requiring robust, thermally stable gearbox solutions.
Quality Control & Certification
ISO 9001:2015 & CE
Full ISO 9001:2015 QMS. CE Declaration of Conformity issued per shipment — compliant with EU Machinery Directive 2006/42/EC and Australian market entry requirements.
Thermal & Load Testing
WPS units undergo a thermal stability run at 110% rated load for 60 minutes. Oil sump temperature must stabilise below 95°C to pass — mirroring demanding metallurgical and chemical duty cycles.
Material Certification
Housing: FC25 cast iron (≥250 MPa). Worm: 20CrMnTi (≥58 HRC). Wheel rim: ZCuSn10Pb1 tin-bronze. Third-party SGS/BV inspection available for major OEM contracts.
Why Choose Ever-power for WPS Gearboxes
We have been manufacturing WP series worm reducers for over two decades, exporting to thermal-critical applications across Europe, the Middle East, Southeast Asia, and Oceania. Our in-house foundry and CNC machining lines give us complete control over fin geometry and casting quality.
- ✅ In-house casting foundry — precise fin geometry control and consistent wall thickness
- ✅ Thermal simulation capability — model steady-state temperatures for your duty cycle before production
- ✅ Batch-to-batch dimensional consistency — CNC machined mating faces, ±0.01 mm
- ✅ OEM options — custom fin profiles, special coatings, private labelling available
- ✅ Fast delivery — WPS stock maintained, 7–15 working day standard lead time
⭐ Customer Reviews
“We replaced our smooth-body gearboxes with WPS units on our rolling mill auxiliary conveyor. The units run 12–14°C cooler. No overheating incidents since the upgrade, and our lubricant change interval has extended from 1,500 to 2,500 hours.”
Michael T., Plant Reliability Engineer
Steel Mill, New South Wales, Australia
“The WPS-155 units we sourced for our cement plant kiln auxiliaries have been running non-stop for 18 months across two 12-hour shifts in a very hot plant room. The cooling fins genuinely make a difference. Solid engineering.”
Stuart W., Maintenance Supervisor
Cement Works, Yorkshire, United Kingdom
“We operate a continuous chemical processing line and needed gearboxes for near-100% duty cycles in a 45°C ambient. The WPS series met our requirements perfectly once we switched to PG 460 synthetic oil. Zero thermal shutdowns in 12 months.”
Ji-won K., Engineering Lead
Chemical Processing Plant, Ulsan, South Korea
“Impressed by the WPS-100 build quality. We use these on our aggregate crusher auxiliaries where ambient temperatures regularly exceed 42°C. The units stay within acceptable temperature limits even without forced ventilation.”
Arun S., Chief Mechanical Officer
Aggregate Processing Plant, Rajasthan, India
❓ Frequently Asked Questions
How much cooler does the WPS run compared to the WPA?
In tests at 100% rated load and 40°C ambient, the WPS maintains oil sump temperature approximately 12–15°C lower than an equivalently loaded WPA. At 110% overload this differential increases to 18–20°C — potentially the difference between safe operation and an overtemperature trip in hot climates.
Can I directly replace a WPA with a WPS without modifying my machine?
Yes — the WPS shares the same base footprint and shaft dimensions as the WPA for each frame size. The only dimensional difference is the increased housing height (H and HL) due to the cooling fins. Verify sufficient vertical clearance before installing. Contact us with your machine clearance details for confirmation.
What lubricant is optimal for the WPS in high-temperature environments?
For ambient temperatures above 40°C or sump temperatures expected to exceed 80°C, we recommend upgrading to synthetic PG (polyalkylene glycol) ISO VG 460. PAG oils offer significantly higher thermal stability and viscosity index, further reducing temperature differential and extending drain intervals to 5,000+ hours.
Does the WPS require special installation considerations due to the cooling fins?
Ensure at least 50 mm of clear air space around the fin array — avoid mounting flush against walls without ventilation gaps. In dusty environments, clean fin channels annually with compressed air. No forced-air cooling is required for standard duty cycles.
What is the maximum continuous operating temperature for the WPS?
The maximum permissible oil sump temperature is 95°C. The WPS is designed so that at rated load and up to 45°C ambient, sump temperatures remain comfortably below this ceiling, giving meaningful thermal headroom compared to a standard WPA in the same conditions.
Upgrade to Thermal-Optimised Worm Drive Performance
Whether you are specifying a new machine or upgrading an overheating installation, Ever-power’s WPS series delivers the thermal headroom you need. Request a free duty-cycle thermal assessment today.
