The WPEDS integrates three features in a single FC25 cast iron two-stage housing: an IEC motor flange at the input, two serial worm-and-wheel stages delivering 1/200–1/900 combined ratio, and cast-integral longitudinal cooling fins on the top and side faces. All three features are part of the single casting — no bolt-on accessories, no secondary bonding, no vibration risk at any component interface.

Three Heat Sources — One Thermal Solution

A motor-direct two-stage drive generates heat from three simultaneous sources: the motor winding, the first-stage gear mesh, and the second-stage gear mesh. The WPEDS fin array is sized to manage all three heat contributions together, maintaining stable oil sump temperature at rated load and up to 45°C ambient without supplemental cooling. Keywords: motor-direct finned two-stage worm gearbox, thermal double speed reducer.

~18°C Lower Temperature vs WPEDA

At rated load and 40°C ambient, the WPEDS maintains oil sump temperature approximately 18°C lower than the smooth-body WPEDA. In rubber vulcanisation and plastics processing environments where ambient temperatures regularly reach 45°C+, this margin keeps the WPEDS safely below the 95°C oil temperature limit where the WPEDA may reach it under full load.

IEC Flange for Rapid Motor Swap

The IEC 60034-7 pilot register allows motor replacement in 15–20 minutes in rubber and plastics plant environments where emergency motor changes during production runs must be completed without batch loss. No coupling to remove, no alignment to re-check — motor slides out, new motor slides in.

Cast-Integral Fins — Permanent Thermal Performance

Fins are integral to the housing casting, ensuring permanent thermal performance with no risk of fin separation under the vibration and thermal cycling characteristic of rubber vulcanisation and plastics processing environments. Unlike bolt-on thermal accessories, the WPEDS fin performance cannot degrade.

Drop-In Thermal Upgrade from WPEDA

WPEDS shares the identical base footprint, flange dimensions, and shaft dimensions with WPEDA. For any WPEDA installation experiencing overtemperature issues in hot process environments, the WPEDS is the minimum-disruption thermal upgrade — verify HL height clearance and swap in place.

VSD/Inverter Compatible — Thermal Headroom for Low-Speed Operation

At low VSD frequencies (20–35 Hz), TEFC motor cooling reduces while the two-stage gear heat generation continues at full load level — increasing the thermal burden on the gearbox. The WPEDS fin array provides additional thermal headroom for these demanding low-speed VSD operation conditions.

Rubber & Vulcanisation IndustryRubber vulcanisation line transport drives, rubber compounding mill auxiliary drives, and tyre building machine slow-speed drives where combined motor and two-stage gearbox heat generation in enclosed plant rooms demands thermal management.

Plastics & Polymer ProcessingPlastic film line auxiliary drives, polymer blending vessel agitators, and continuous extruder accessory drives operating at very low speeds in warm, enclosed factory environments.

Chemical Process — Continuous OperationContinuous chemical reactor agitator drives operating at 90%+ duty cycle, polymerisation vessel drives, and specialty adhesive manufacturing vessel drives requiring ultra-low speed motor-direct two-stage drive with thermal stability.

Bioprocessing & FermentationLarge bioreactor and fermentation vessel agitator drives requiring very low impeller speeds, compact motor-direct mounting, and reliable thermal performance during extended 24/7 batch production cycles.

Hot Climate Continuous DrivesAny outdoor or poorly-ventilated industrial drive in tropical, subtropical, or Gulf region environments where ambient temperatures regularly exceed 40°C and the combined thermal load of motor and two-stage gearbox requires fin-assisted dissipation.

Battery & New Energy ManufacturingElectrode slurry mixing vessel drives, battery electrolyte agitation systems, and new energy material processing equipment requiring compact motor-direct ultra-low-speed drives with thermal stability.

ISO 9001:2015 & CE

Full ISO 9001:2015 QMS. CE Declaration of Conformity per shipment. Fin casting quality inspected at foundry stage before machining commences — fin completeness, wall thickness, and geometry verified against drawing spec.

️ Triple-Source Thermal Run Test

Each WPEDS undergoes a 90-minute thermal stability run at 110% rated torque. Oil sump temperature must stabilise below 95°C, with temperature differential between the two stage positions ≤10°C. This test validates that the fin array manages the combined three-source heat load under the most demanding rated conditions.

Material & Fin Verification

Housing: FC25 cast iron (≥250 MPa). Both worm shafts: 20CrMnTi (≥58 HRC). Wheel rims: ZCuSn10Pb1. IEC flange CMM verified (≤0.05 mm TIR). Fin geometry verified at casting stage. Third-party SGS/BV inspection available for rubber, plastics, and chemical industry quality audits.

We supply WPEDS triple-feature gearboxes to rubber industry equipment builders, plastics processing machinery manufacturers, and continuous chemical process OEMs in the USA, Spain, South Africa, Australia, and over 60 countries. Our 90-minute thermal stability test at 110% rated torque is a higher standard than our WPEDA test — because the WPEDS customer is one who genuinely cannot afford an overtemperature failure in their production environment.

• ✅ 90-minute thermal stability test at 110% rated torque — every unit
• ✅ Foundry-stage fin geometry inspection — before machining
• ✅ IEC flange CMM + two-stage mesh + thermal verification — triple check
• ✅ Thermal simulation service — model your three-source heat load before ordering
• ✅ 20+ years export record — USA, Spain, South Africa, Australia and beyond

“We upgraded our vulcanisation line transport drives from WPEDA to WPEDS after repeated overtemperature trips during summer production in our enclosed plant room. The improvement is dramatic — the WPEDS units run 17°C cooler on the same duty cycle and we have had zero thermal stops in 15 months since the upgrade. The three-feature combination is exactly what our application needed.”

Chris B., Production Engineer
Rubber Products Plant, New South Wales, Australia

“We specify WPEDS for all motor-direct two-stage drives on our plastic film line equipment. The three features — IEC flange, 1/600 ratio, cooling fins — are all required for our application. Build quality from Ever-power is excellent and the thermal performance consistently meets our specification. We have ordered eight batches now with zero quality rejections.”

Michael C., Drive Systems Engineer
Plastics Processing OEM, Ohio, USA

“Our continuous chemical agitator drives run 24/7 in enclosed plant rooms at 42°C ambient. The WPEDS units manage the combined motor and two-stage gear heat load without supplemental cooling — impossible with the smooth-body WPEDA we used previously. The 1/800 ratio achieves the very slow impeller speeds our process requires. Excellent product.”

Carlos R., Maintenance Manager
Chemical Process Plant, Barcelona, Spain

“WPEDS on our rubber compound mixer drives in a hot plant room. The combined fins handle our summer ambient temperatures (up to 44°C) well. The IEC flange makes motor maintenance easier. One batch had slightly longer delivery than stated but Ever-power communicated proactively. Overall very satisfied with the product.”

Thabo M., Process Engineer
Rubber Compounding Plant, Johannesburg, South Africa