Descripción
WPWED Flange-Base Motor-Direct Double Speed Worm Gear Reducer — The Most Rigidly Mounted Motor-Direct Ultra-High Ratio Drive
When large-scale pharmaceutical fermentation vessels, heavy chemical reactors, or substantial biogas digesters require a two-stage 1/200–1/900 drive, two installation priorities must be met simultaneously: the motor must connect directly without a coupling (for compactness and maintenance simplicity), and the gearbox must be anchored with maximum rigidity to withstand the high reaction torques of two-stage operation at very high combined ratios. The WPWED flange-base motor-direct double speed worm gear reducer is engineered to satisfy both requirements.
Combining the IEC motor flange of the WPEDA series with the integral flanged anchor base of the WPWE series, the WPWED delivers motor-direct two-stage ultra-high ratio reduction anchored by multiple base bolts to the supporting structure — the most rigidly mounted, most installation-integrated product in the WPE two-stage family. Available in 9 size groups, motors 0.12–5.5 kW, ratios 1/200–1/900. About Ever-power | Request a Selection Guide
Technical Specifications
WPWED integrates the WPWE flanged base with IEC motor flange. AC, BC, AD, BD = flanged base dimensions; Z×L = anchor bolt specification. Motor flange: LA, LB, LC, LE, LZ. All in mm; reference speed 1500 r/min.
| Size | Power(kW) | Ratio | A | AB | BB | BE | AC | BC | AD | BD | HH | HL | LL | Z×L | LA | LB | LC | LE | LZ | Q | U | T×V | LS | S | W×Y | Wt(kg) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 40-70 | 0.12 | 1/200–1/900 | 314 | 153 | 131 | 75 | 152 | 86 | 125 | 65 | 200 | 90 | 215 | M10×25 | 115 | 95 | 140 | 4 | M8 | 31 | 11 | 4×12.8 | 60 | 28 | 7×4 | 19 |
| 50-80 | 0.18 | 314 | 144 | 142 | 83 | 169 | 102 | 140 | 70 | 235 | 105 | 250 | M12×28 | 115 | 95 | 140 | 4 | M8 | 31 | 11 | 4×12.8 | 65 | 32 | 10×4.5 | 28 | |
| 60-100 | 0.37 | 1/200 | 387 | 175 | 169 | 91 | 216 | 117 | 180 | 90 | 290 | 130 | 310 | M12×30 | 130 | 110 | 160 | 4 | M8 | 33 | 14 | 5×16.3 | 75 | 38 | 10×4.5 | 44 |
| 70-120 | 0.37/0.75 | 1/300–1/400 | 425/445 | 193 | 190 | 109/111 | 256 | 124 | 220 | 100 | 345 | 155 | 370 | M14×32 | 130/165 | 110/130 | 160/200 | 4 | M8/M10 | 40/42 | 14/19 | 5×16.3/6×21.8 | 85 | 45 | 12×4.5 | 66 |
| 80-135 | 0.75/1.5 | 1/500–1/600 | 499 | 226 | 210 | 125 | 296 | 147 | 260 | 110 | 400 | 185 | 425 | M16×35 | 165 | 130 | 200 | 4.5 | M10 | 48/52 | 19/24 | 6×21.8/8×27.3 | 95 | 55 | 16×6 | 101 |
| 100-155 | 1.5 | 1/800 | 570 | 269 | 252 | 148 | 345 | 185 | 280 | 120 | 458 | 203 | 461 | M16×35 | 165 | 130 | 200 | 4.5 | M10 | 52 | 24 | 8×27.3 | 110 | 60 | 18×7 | 139 |
| 120-175 | 2.2/3.0 | 1/900 | 631 | 287 | 282 | 181 | 374 | 192 | 320 | 140 | 518 | 223 | 521 | M16×35 | 215 | 180 | 250 | 5 | M12 | 63 | 28 | 8×31.3 | 110 | 65 | 18×7 | 196 |
| 135-200 | 3.0/4.0 | 680 | 318 | 319 | 202 | 412 | 230 | 360 | 150 | 580 | 245 | 575 | M20×36 | 215 | 180 | 250 | 5 | M12 | 63 | 28 | 8×31.3 | 125 | 70 | 20×7.5 | 285 | |
| 155-250 | 5.5 | 815 | 380 | 385 | 247 | 500 | 285 | 420 | 190 | 705 | 300 | 700 | M24×42 | 265 | 230 | 300 | 5 | M12 | 83 | 38 | 10×41.3 | 155 | 90 | 25×9 | 450 |
* AC and BC define flange arm geometry; AD and BD define bolt hole spacing from housing centreline. Z×L = anchor bolt specification per size group (e.g. M16×35). LA, LB, LC = IEC 60034-7 motor flange dimensions.
Product Structure — IEC Flange + Two-Stage Cascade + Flanged Base
The WPWED is the structural integration of three features in one casting: an IEC motor flange at the first-stage input (motor direct, no coupling), a two-stage worm cascade delivering ultra-high reduction, and a wide flanged base with multiple anchor bolt positions distributing the reaction torque over a large mounting footprint. The base is precision-machined to ≤0.05 mm flatness, ensuring full contact with the mounting pedestal.
| Motor Input | IEC 60034-7 flange + keyed bore — no coupling; 0.12–5.5 kW range |
| Stages | Two worm-and-wheel pairs in series; ratio 1/200–1/900 |
| Base | Integral flanged base; multiple anchor bolt positions; precision flat to ≤0.05 mm |
| Anchor Bolts | Z×L per size group (M10×25 to M24×42 across the size range) |
| Housing | FC25 cast iron; all three features integral to one casting |
| Shaft Directions | 5 positions (A–E) |
✅ Key Features & Benefits
Motor-Direct + Two-Stage + Flanged Base — Highest Integration in WPE Series
The WPWED combines the three most important features of the WPE product family in a single casting: IEC motor direct-mount (WPEDA feature), ultra-high ratio two-stage reduction (common to all WPE), and flanged base anchor mounting (WPWE feature). This is the most structurally integrated motor-direct two-stage product available. Keywords: flanged-base motor-direct double speed worm gearbox, rigid anchor-mount two-stage reducer.
Maximum Reaction Torque Resistance
At combined ratios of 1/600–1/900 with 3–5.5 kW motors, the reaction torque transmitted to the gearbox mounting is substantial. The WPWED flanged base with multiple anchor bolts distributes this reaction torque over the largest mounting footprint of any product in the WPE series — preventing bolt loosening, structural fatigue, and vibration transmission to the supporting frame.
IEC Flange for Rapid Motor Maintenance
In pharmaceutical and chemical process environments where motor replacement must be completed quickly to minimise batch cycle disruption, the IEC pilot register allows motor swap in under 20 minutes — no coupling removal, no alignment re-check, no re-calibration of mounting bolts in the flanged base.
Two-Stage Precision at Very High Torque Loads
Both worm pairs ground to ISO 1328 Grade 7 deliver smooth, uniform output at the ultra-low speeds and very high torques characteristic of large vessel agitator and heavy process drive applications. Smooth output is critical for processes involving viscous materials where gear-induced velocity variation causes non-uniform mixing.
No Additional Baseplate Required
The integral flanged base eliminates the need for a separate motor-gearbox baseplate. The WPWED bolts directly to the vessel pedestal, machine frame, or structural concrete foundation — saving both cost and the alignment interface of a separate baseplate installation.
Full Size Range — 0.12 to 5.5 kW
Nine size groups cover the full range from small pharmaceutical vessel drives (0.12 kW, 1/900 ratio) to large industrial process drives (5.5 kW, 1/200–1/900 ratio), providing a single standardised product family for motor-direct flanged-base two-stage applications.
Industry Applications
The WPWED is specified for motor-direct two-stage drives requiring maximum mounting rigidity on vessel pedestals and machine structural bases:
Pharmaceutical BioreactorsLarge-scale bioreactor and fermenter agitator drives in GMP pharmaceutical manufacturing where rigid flanged base mounting to the vessel support structure and motor-direct convenience are both specified requirements.
Heavy Chemical ReactorsLarge-volume continuous stirred-tank reactor (CSTR) drives, polymerisation vessel agitators, and specialty chemical mixing vessel drives requiring rigid mounting and motor-direct ultra-low speed from compact pedestal-mounted assemblies.
Biogas & Anaerobic TreatmentLarge biogas digester and anaerobic treatment vessel agitator drives requiring robust flanged-base mounting to concrete pedestals and motor-direct ultra-slow stirring from a compact integrated unit.
Heavy Industrial Vessel DrivesLarge industrial autoclave drives, heavy pressure vessel agitators, and large rotary drum drives requiring the maximum rigidity of flanged base anchor mounting combined with motor-direct convenience.
Food Processing Large VesselsLarge food ingredient mixing vessel drives, industrial batch cooker agitators, and large dairy processing vessel drives requiring GMP-compatible motor-direct ultra-low speed with rigid pedestal mounting.
Continuous Process IndustryAny continuous process vessel drive where high reaction torques from 1/600–1/900 two-stage operation demand flanged base anchoring AND motor-direct simplicity in a single compact unit.
Quality Control & Certification
ISO 9001:2015 & CE
Full ISO 9001:2015 QMS. CE Declaration of Conformity per shipment. Pharmaceutical GMP documentation packages available. IEC flange concentricity CMM verified; base flatness scanned to ≤0.05 mm TIR — both on every WPWED unit.
Dual Interface Verification + Run Test
Each WPWED undergoes: (1) IEC flange concentricity CMM check, (2) flanged base flatness CMM scan, (3) 45-minute two-stage loaded run test verifying noise (≤75 dB(A)), oil seal integrity, and output torque (±5% of rated). Two interface checks plus run test — the most complete pre-shipment verification in the WPE series.
Material Standards
Housing and flanged base: FC25 cast iron (≥250 MPa). Both worm shafts: 20CrMnTi (≥58 HRC). Wheel rims: ZCuSn10Pb1 tin-bronze. Full material mill certificates and third-party SGS/BV inspection on request for pharmaceutical and chemical plant quality compliance.
Why Choose Ever-power for WPWED Gearboxes
We supply WPWED flanged-base motor-direct two-stage gearboxes to pharmaceutical vessel OEMs, chemical reactor equipment builders, and biogas system manufacturers in Japan, Germany, the UAE, Australia, and over 60 countries. Our dual interface verification — both IEC flange concentricity and base flatness CMM checked on every unit — ensures that WPWED customers receive a product that fits their motor AND bolts flat to their mounting structure without shimming.
- ✅ Dual CMM verification — IEC flange AND base flatness, every unit
- ✅ Pharmaceutical GMP documentation packages on request
- ✅ Custom anchor bolt patterns for non-standard vessel pedestal configurations
- ✅ Food-grade lubricant factory-fill available on request for food vessel applications
- ✅ 20+ years export record — Japan, Germany, UAE, Australia and beyond
⭐ Customer Reviews
“We use WPWED units on our large bioreactor vessel agitator drives. The combination of IEC flange motor mounting and flanged base anchor to our vessel pedestal is exactly what our GMP-compliant machine design requires — no loose couplings, no baseplate alignment, and the base flat CMM verification report is perfect documentation for our equipment qualification records.”
Brendan T., Process Engineer
Pharmaceutical Manufacturing, Victoria, Australia
“We integrate WPWED gearboxes into our large continuous reactor vessel drives. The 1/900 ratio achieves the very slow impeller speed our polymerisation process requires, and the flanged base mounting to our concrete pedestal has not loosened in three years of continuous operation under high reaction torque. Excellent engineering.”
Hiroshi Y., Engineering Manager
Chemical Vessel Equipment, Osaka, Japan
“We use WPWED-80/135 at 1/600 ratio on our biogas digester mixing drives. The flanged base anchor mounting handles the cyclic loading of fermenting slurry agitation without bolt loosening, and the IEC flange keeps motor maintenance simple for our field service teams. Two years of reliable outdoor operation. Sehr gut.”
Stefan B., Product Manager
Biogas Plant Equipment, Munich, Germany
“WPWED units for large chemical reactor drives in the UAE. The flanged base provides the rigidity needed in our outdoor concrete-mounted installations where thermal expansion cycles would loosen standard foot-mount units over time. Good quality and reliable delivery. Would recommend for vessel drive applications.”
Yousuf K., Technical Manager
Industrial Process Equipment, Dubai, UAE
❓ Frequently Asked Questions
What is the difference between WPWED and WPEDA?
The WPEDA has a standard foot-mount base (two bolt pads). The WPWED has an integral flanged base with multiple anchor bolt positions providing far greater mounting rigidity. Both have the IEC motor flange and identical two-stage gear sets. Choose WPEDA for standard foot-mount applications; choose WPWED where high reaction torques from ultra-high combined ratios demand maximum base mounting rigidity to a vessel pedestal or structural base.
What is the relationship between WPWED and WPWE?
The WPWE is the non-motor-direct version of the flanged base two-stage gearbox — it has a standard solid input shaft. The WPWED adds an IEC motor flange at the input, making it motor-direct (no coupling needed). Both have the identical flanged base. If you currently use a WPWE and want to eliminate the input coupling, the WPWED is the direct upgrade.
Does the WPWED require a separate motor mounting plate?
No — the IEC motor flange is integral to the WPWED housing. The motor bolts directly to the IEC flange face of the gearbox. No separate motor plate, no intermediate adapter, no alignment tooling required. The motor + WPWED unit is then bolted as an assembly to the vessel pedestal or machine frame using the integral flanged base anchor bolts.
What anchor bolt specification should I use for each WPWED size?
The Z×L column in the specification table defines the anchor bolt per size group. Size 40-70 uses M10×25; size 80-135 uses M16×35; size 155-250 uses M24×42. These specifications ensure the flanged base can be reliably secured for the reaction torque of the corresponding two-stage gear set. For non-standard base materials (e.g. stainless steel base frames), contact us for anchor bolt torque recommendations.
Can the WPWED be used with a VSD/inverter in pharmaceutical applications?
Yes — the WPWED is compatible with VSD operation for variable-speed pharmaceutical batch processes. For continuous low-speed VSD duty (below 30 Hz), note that TEFC motor cooling reduces proportionally. For pharmaceutical applications operating VSD at very low speeds continuously, consider the WPWEDS (finned motor-direct flanged base, if required) or specify a forced-ventilation motor. Contact us for a thermal assessment for your specific pharmaceutical VSD duty cycle.
Maximum Rigidity Motor-Direct Two-Stage Drive — Enquire About WPWED
For large vessel drives requiring motor-direct convenience AND rigid flanged base anchoring, the WPWED is the definitive solution. Our engineers will confirm the anchor bolt specification, motor compatibility, and provide a fast quotation for your application.
