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WPWEKO Hollow Shaft Vertical Flange-Base Double Speed Worm Gear Reducer — The Most Feature-Complete Product in the WPE Two-Stage Series
The WPWEKO represents the highest integration point in the WPE double-speed family — combining four engineering features that individually define separate product categories: a hollow output bore (coupling-free shaft mounting), multi-direction mounting including full vertical, a flanged anchor base for rigid structural mounting, and two-stage 1/200–1/900 ultra-high ratio reduction. No other WPE product incorporates all four features simultaneously.
This makes the WPWEKO the definitive solution for offshore platform hollow-shaft drives, marine vertical agitator systems, and heavy-duty energy industry drives where coupling-free output, vertical installation, anchor-bolt base rigidity, and ultra-high ratio must all be specified together in a single compact cast iron unit. Available in 9 size groups, bore 30–110 mm, ratios 1/200–1/900. About Ever-power | Request a Technical Consultation
Technical Specifications
WPWEKO dimensional data. BA = housing offset; CA = output shaft span; E, E₁, E₂ = output shaft dimensions; M, N, H = housing body dimensions. S = hollow bore diameter (H7). Reference speed 1500 r/min. All dimensions in mm.
| Size | Ratio | A | AA | AB | B | BA | BC | BE | HB | CA | H | M | N | E | E₁ | E₂ | G | Z | HS | U | T×V | S(bore) | W×Y(keyway) | Wt(kg) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 40-70 | 1/200–1/900 | 286 | 195 | 153 | 130 | 40 | 65 | 87 | 50 | 157 | 140 | 152 | 305 | 120 | 120 | 155 | 20 | 15 | 25 | 12 | 4×2.5 | 30 | 8×33.3 | 19.5 |
| 50-80 | 297 | 197 | 144 | 150 | 50 | 70 | 108 | 65 | 188 | 155 | 174 | 350 | 140 | 140 | 180 | 20 | 15 | 30 | 12 | 4×2.5 | 35 | 10×38.3 | 30.5 | |
| 60-100 | 363 | 231 | 175 | 160 | 60 | 90 | 120 | 75 | 222 | 192 | 224 | 410 | 190 | 165 | 215 | 22 | 15 | 40 | 15 | 5×3 | 40 | 12×43.3 | 47 | |
| 70-120 | 408 | 256 | 193 | 175 | 70 | 100 | 140 | 90 | 260 | 225 | 264 | 494 | 220 | 195 | 255 | 25 | 18 | 40 | 18 | 5×3 | 45 | 14×48.8 | 69 | |
| 80-135 | 471 | 298 | 226 | 210 | 80 | 110 | 160 | 105 | 295 | 255 | 304 | 559 | 260 | 230 | 285 | 30 | 18 | 50 | 22 | 7×4 | 60 | 18×64.4 | 105 | |
| 100-155 | 555 | 354 | 269 | 256 | 100 | 140 | 190 | 130 | 345 | 320 | 345 | 605 | 290 | 250 | 305 | 35 | 21 | 50 | 25 | 7×4 | 70 | 20×74.9 | 163 | |
| 120-175 | 598 | 379 | 287 | 282 | 120 | 150 | 219 | 155 | 394 | 365 | 374 | 675 | 320 | 273 | 348 | 40 | 21 | 65 | 30 | 7×4 | 80 | 22×85.4 | 208 | |
| 135-200 | 662 | 425 | 318 | 320 | 135 | 175 | 256 | 185 | 456 | 415 | 424 | 749 | 370 | 305 | 390 | 40 | 24 | 75 | 35 | 10×4.5 | 85 | 22×90.4 | 302 | |
| 155-250 | 795 | 510 | 380 | 400 | 155 | 200 | 295 | 203 | 545 | 458 | 510 | 920 | 440 | 375 | 475 | 45 | 28 | 85 | 40 | 12×5 | 110 | 28×116.4 | 476 |
* S = hollow bore H7. E₁ and E₂ = output shaft extension dimensions above and below the housing face for vertical mounting. BA, BC = housing body dimensional offsets. Multi-face oil ports not shown — supplied with position-specific oil fill instructions.
Product Structure — Four Features in One Casting
The WPWEKO integrates four engineering features in a single FC25 cast iron casting: a two-stage worm cascade (ratio 1/200–1/900), a through-bored H7 hollow output shaft for coupling-free shaft engagement, multi-face oil ports and reinforced bearings for vertical and multi-angle mounting, and a flanged anchor base with multiple bolt positions for rigid structural mounting.
| Feature 1 | Two worm-and-wheel stages in series — ratio 1/200–1/900 |
| Feature 2 | H7 hollow bore + keyway — driven shaft direct, no coupling |
| Feature 3 | Multi-face oil ports + reinforced bearings — correct lubrication at any angle |
| Feature 4 | Integral flanged anchor base — multiple bolt positions, precision-flat |
| Housing | FC25 cast iron — all four features integral to one casting |
| Input | Standard solid shaft; 5 input direction positions (A–E) |
✅ Key Features & Benefits
Four Features — One Product Number
Specifying the WPWEKO in place of a combination of WPEKA (hollow bore), WPEO (vertical), and WPWE (flanged base) variants eliminates three separate product decisions and replaces them with one — because no combination of simpler products can achieve all four features simultaneously in a single housing. Keywords: hollow shaft vertical flange-base double speed worm gearbox, four-feature two-stage reducer.
Flanged Base for Maximum Reaction Torque Resistance
At 1/600–1/900 combined ratios, reaction torques transmitted to the mounting structure are very high. The WPWEKO flanged base distributes these forces over the largest footprint of any hollow shaft product in the WPE series — essential for offshore structural mounting and heavy marine equipment where bolt loosening under vibration cannot be tolerated.
Vertical Hollow Bore — The Marine & Offshore Advantage
For offshore platform agitator drives and ship-mounted mixing systems, the WPWEKO’s hollow vertical output bore allows the agitator shaft to pass through from below with direct engagement — no coupling protruding above the gearbox to interfere with overhead clearances in confined platform spaces.
Multi-Face Oil System — Both Stages in Any Orientation
The WPWEKO’s multi-face oil port system ensures both worm gear stages remain correctly lubricated in horizontal, vertical, and inclined mounting. For offshore and marine equipment subject to vessel motion and pitch/roll, maintaining adequate oil immersion at both stages under dynamic conditions is critical.
Self-Locking in Vertical Applications
At combined ratios ≥1/400, the WPWEKO provides static self-locking — preventing gravity-driven reversal of connected agitator or pump shafts. Combined with the flanged base rigidity, this makes the WPWEKO a secure load-holding drive for vertical process equipment.
Designed for Marine & Offshore Environments
The integral flanged base with precision-flat CMM-verified mounting surface, the four-bearing housing with reinforced vertical load capacity, and the H7 hollow bore all reflect the engineering requirements of marine and offshore applications where installation precision, structural rigidity, and mechanical simplicity are essential.
Industry Applications
The WPWEKO is the only product in the WPE series combining all four critical features for offshore, marine, and heavy structural drive applications:
Offshore Platform DrivesOffshore oil & gas platform deck agitator drives, subsea chemical injection system auxiliaries, and offshore crane slow-speed auxiliary drives requiring hollow bore direct mounting with flanged anchor rigidity in marine structural frames.
Marine Vessel EquipmentShip-mounted mixing system drives, vessel deck machinery auxiliary drives, and marine desalination plant agitator drives where hollow shaft coupling-free mounting, flanged base rigidity, and multi-orientation capability are all simultaneously required.
Wind & Renewable EnergyOffshore wind turbine pitch control auxiliary drives, tidal energy equipment slow-speed drives, and wave energy converter auxiliary mechanisms requiring compact hollow shaft high-ratio drives in marine structural installations.
Heavy Energy InfrastructureLarge power plant cooling tower agitator slow drives, nuclear plant auxiliary systems, and heavy energy infrastructure equipment requiring all four WPWEKO features for maximum reliability and installation rigidity.
Special Chemical & MiningLarge mineral flotation cell hollow-shaft agitator drives, hydrometallurgy leaching vessel drives, and specialty chemical vessel drives requiring combined hollow bore, vertical mounting, flanged base, and ultra-high ratio in a single unit.
Heavy Structural EquipmentLarge structural positioning drives, heavy industrial turntable slow-rotation systems, and bridge machinery auxiliary drives where all four features are required for the specific structural integration demands of the application.
Quality Control & Certification
ISO 9001:2015 & CE
Full ISO 9001:2015 QMS. CE Declaration of Conformity per shipment. Third-party SGS/BV inspection and material certs for marine classification and offshore authority compliance. Base flatness CMM verified (≤0.05 mm TIR); bore H7 plug gauged — both on every unit.
Four-Feature Verification Test
Each WPWEKO undergoes the most comprehensive inspection in the WPE series: (1) bore H7 plug gauge, (2) bore concentricity ≤0.05 mm TIR, (3) base flatness CMM scan, (4) two-stage run test in vertical orientation verifying noise (≤75 dB(A)), seal integrity, and torque. Four checks, every unit.
Marine Documentation
Material mill certificates, third-party inspection reports (SGS/BV), CE Declaration of Conformity, and vertical orientation oil fill documentation are all available as a marine/offshore compliance package on request. We have supplied documentation packages to offshore operators in Norway, Singapore, and the Gulf region.
Why Choose Ever-power for WPWEKO Gearboxes
We supply WPWEKO gearboxes to offshore equipment suppliers, marine machinery manufacturers, and heavy energy industry equipment builders in Norway, Singapore, South Africa, Australia, and over 60 countries. Our four-feature verification test — the most comprehensive inspection standard in our WPE range — reflects the high stakes of offshore and marine applications where a gearbox failure is not just a production problem but a structural safety concern.
- ✅ Four-feature verification standard — bore, concentricity, base flatness, vertical run test
- ✅ Marine & offshore documentation packages — SGS/BV, material certs, oil fill guide
- ✅ Custom anchor bolt patterns for non-standard offshore structural frames
- ✅ Custom bore diameters for non-standard marine equipment shaft sizes
- ✅ 20+ years export record — Norway, Singapore, South Africa, Australia and beyond
⭐ Customer Reviews
“We use WPWEKO units on our offshore platform deck agitator drives. The four-feature combination is unique — no other product gives us hollow bore, vertical, flanged base, and 1/600 ratio simultaneously. The unit fits directly into our structural steel frame with the anchor bolts, and the hollow bore accepts our agitator shaft with no coupling hardware above the gearbox. Critical for our overhead clearance constraints.”
Peter M., Offshore Equipment Engineer
Offshore Platform Supplier, Western Australia, Australia
“We integrate WPWEKO gearboxes into our offshore chemical injection system drives. The flanged base anchor mounting is essential for the structural rigidity requirements of North Sea offshore platforms. The 1/900 ratio and hollow shaft give us exactly the slow, direct coupling-free drive our system needs. Excellent quality and marine compliance documentation from Ever-power.”
Erik H., Marine Engineer
Offshore Equipment Manufacturer, Stavanger, Norway
“We supply WPWEKO units to vessel builders in Singapore. The combination of hollow bore, vertical mounting, anchor base, and ultra-high ratio is exactly what ship-mounted mixing systems require. The vertical run test documentation and SGS inspection reports satisfy our clients’ classification requirements. Consistent quality across multiple vessel project supply programmes.”
James L., Technical Manager
Marine Equipment Supplier, Singapore
“WPWEKO gearboxes for our large flotation cell hollow-shaft agitator drives. The combination of 1/600 ratio, hollow bore direct mounting, and flanged base anchor to our structural frame is exactly what this application needs. Good quality and the four-feature verification test report is a useful quality record. Delivery was slightly longer than expected for our custom bore size but resolved satisfactorily.”
John M., Drive Systems Engineer
Mining Equipment Supplier, Cape Town, South Africa
❓ Frequently Asked Questions
What makes the WPWEKO the most feature-complete product in the WPE series?
The WPWEKO uniquely combines four features that are only available individually in other products: (1) hollow output bore (WPEKA), (2) vertical/multi-direction mounting (WPEO), (3) flanged anchor base (WPWE), and (4) two-stage 1/200–1/900 ratio (all WPE series). No other single WPE product combines all four. The WPWEKO is the selection when your application requires all four simultaneously.
What is the difference between WPWEKO and WPEKA?
The WPEKA has a hollow bore and two-stage reduction, but standard foot-mount base and single-orientation mounting. The WPWEKO adds flanged anchor base and multi-direction mounting including vertical to these features. Choose WPEKA when standard foot-mount horizontal installation is acceptable; choose WPWEKO when rigid structural anchor mounting and/or vertical/inclined installation are also required.
Does the WPWEKO require special lubrication setup for vertical orientation?
Yes — the multi-face oil port system provides oil-fill plugs on multiple housing faces to establish the correct oil level for both worm gear stages at any mounting angle. Every WPWEKO is supplied with position-specific oil fill instructions that specify which port to use and the correct level for each rated orientation. Do not use horizontal oil level guidance for vertical installations.
What is the maximum hollow bore diameter for the WPWEKO?
The largest standard bore is 110 mm for size 155-250, the same as the WPEKA. Custom bore diameters are available for offshore and marine applications with non-standard shaft sizes — contact us with your required bore diameter and we will confirm availability for your size group.
What marine classification documentation is available for the WPWEKO?
On request, we can provide: (1) material mill certificates for all major components, (2) SGS or BV third-party inspection report covering dimensional verification and run test, (3) CE Declaration of Conformity, (4) vertical orientation oil fill documentation, and (5) product data sheets. These documents support marine classification society approval processes for vessel and offshore platform applications. Contact us with your classification requirements at the time of order placement.
Four Features — One Product — Get WPWEKO Technical Consultation
When your offshore, marine, or heavy structural application requires hollow bore, vertical mounting, flanged base, and ultra-high two-stage ratio simultaneously, the WPWEKO is the only product engineered for exactly this requirement. Contact our engineers for a technical consultation and marine documentation quotation.
