Description
WPWDKO Flange-Mounted Universal Hollow Shaft Worm Gear Reducer — Zero Couplings at Both Ends, Up to Six Mounting Orientations, for Port & Crane Hollow Shaft Drives
Port cranes, inclined mine conveyors, and vertical process equipment often demand three simultaneous drive requirements: motor-direct coupling-free input (for maintenance simplicity in remote or elevated installations), hollow bore coupling-free shaft output (for compact drum shaft engagement without coupling hardware), and non-standard mounting orientations beyond horizontal. The WPWDKO flange-mounted universal hollow shaft worm gear reducer is the only product in the WPW series that satisfies all three simultaneously.
IEC motor flange at input, H7 hollow bore at output, reinforced bearings for vertical and inclined loads, multi-face oil ports for correct lubrication at each position, and up to six mounting orientations (A–D). Motors 0.12–15 kW, bore 16–110 mm, ratios 1/5–1/60. About Ever-power | Get a Technical Consultation
Technical Specifications
WPWDKO has its own specification drawing. Motor flange: LA/LB/LC/LE/LZ per IEC 60034-7. Multi-direction output: E, E₁, E₂ geometry. Hollow bore: S (H7); W×Y. Reference speed 1500 r/min. All dimensions in mm.
| Size | Power(kW) | Ratio | A | AB | B | BC | CC | M | N | E | E₁ | E₂ | G | Z | LA | LB | LC | LE | LZ | Q | U | T×V | S(bore) | W×Y | Wt(kg) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 40 | 0.12 | 1/5–1/60 | 135 | 75 | 85 | 45 | 40 | 95 | 187 | 70 | 72 | 97 | 12 | 10 | 115 | 95 | 140 | 4 | M8 | 31 | 11 | 4×12.8 | 16 | 6×18.8 | 5.4 |
| 50 | 0.18 | 151 | 83 | 105 | 50 | 50 | 111 | 228 | 90 | 90 | 110 | 14 | 12 | 115 | 95 | 140 | 4 | M8 | 31 | 11 | 4×12.8 | 20 | 6×22.8 | 8.5 | |
| 60 | 0.37 | 167 | 91 | 110 | 55 | 60 | 127 | 257 | 100 | 102 | 129 | 15 | 12 | 130 | 110 | 160 | 4 | M8 | 33 | 14 | 5×16.3 | 25 | 8×28.3 | 12 | |
| 70 | 0.37/0.75 | 200/202 | 109/111 | 130 | 65 | 70 | 152 | 305 | 120 | 120 | 155 | 20 | 15 | 130/165 | 110/130 | 160/200 | 4 | M8/M10 | 40/42 | 14/19 | 5×16.3/6×21.8 | 30 | 8×33.3 | 17 | |
| 80 | 0.75/1.5 | 225 | 125 | 150 | 70 | 80 | 174 | 350 | 140 | 140 | 180 | 20 | 15 | 165 | 130 | 200 | 4.5 | M10 | 48/52 | 19/24 | 6×21.8/8×27.3 | 35 | 10×38.3 | 26 | |
| 100 | 1.5 | 280 | 148 | 160 | 90 | 100 | 224 | 410 | 190 | 165 | 215 | 22 | 15 | 165 | 130 | 200 | 4.5 | M10 | 52 | 24 | 8×27.3 | 40 | 12×43.3 | 40.5 | |
| 120 | 2.2/3.0 | 333 | 181 | 175 | 100 | 120 | 264 | 494 | 220 | 195 | 255 | 25 | 18 | 215 | 180 | 250 | 5 | M12 | 63 | 28 | 8×31.3 | 45 | 14×48.8 | 59 | |
| 135 | 3.0/4.0 | 375 | 202 | 210 | 110 | 135 | 304 | 559 | 260 | 230 | 285 | 30 | 18 | 215 | 180 | 250 | 5 | M12 | 63 | 28 | 8×31.3 | 60 | 18×64.4 | 89 | |
| 155 | 5.5 | 448 | 247 | 256 | 140 | 155 | 345 | 605 | 290 | 250 | 305 | 35 | 21 | 265 | 230 | 300 | 5 | M12 | 83 | 38 | 10×41.3 | 70 | 20×74.9 | 138 | |
| 175 | 5.5/7.5 | 481 | 262 | 282 | 150 | 175 | 374 | 675 | 320 | 273 | 348 | 40 | 21 | 265 | 230 | 300 | 5 | M12 | 83 | 38 | 10×41.3 | 80 | 22×85.4 | 172 | |
| 200 | 11.0 | 543 | 285 | 320 | 175 | 200 | 424 | 749 | 370 | 305 | 390 | 40 | 24 | 300 | 250 | 350 | 6 | M16 | 114 | 42 | 12×45.3 | 85 | 22×90.4 | 246 | |
| 250 | 11.0/15.0 | 615 | 330 | 400 | 200 | 250 | 510 | 920 | 440 | 375 | 475 | 45 | 28 | 300 | 250 | 350 | 6 | M16 | 114 | 42 | 12×45.3 | 110 | 28×116.4 | 410 |
* Independent spec drawing. Motor flange: LA, LB, LC per IEC 60034-7. E, E₁, E₂ = hollow bore output geometry; S = bore H7; W×Y = keyway. BC = multi-direction housing width. Supports up to 4 shaft-direction positions (A–D) including vertical. Position-specific oil fill documentation supplied.
Product Structure — IEC Flange + Hollow Bore + Multi-Direction Housing
The WPWDKO unites the IEC motor flange of the WPWDK with the multi-direction housing of the WPWKO. The motor shaft enters the IEC keyed bore at the input; the driven shaft engages the H7 hollow bore at the output; the housing body supports multiple mounting orientation positions with reinforced output bearings for vertical and inclined load vectors and multi-face oil ports for each position.
| Motor Input | IEC 60034-7 flange + keyed bore — motor shaft direct, no coupling |
| Output | H7 hollow bore + keyway; 16–110 mm — driven shaft direct, no coupling |
| Orientations | Up to 4 positions (A–D) including vertical; reinforced bearings |
| Oil System | Multi-face ports; correct lubrication for each rated position |
| Motor Range | 0.12 kW (size 40) to 15 kW (size 250) |
| Self-Locking | At ratios ≥1/30 in all mounting orientations including vertical |
✅ Key Features & Benefits
Three Zero-Coupling Features at Any Mounting Angle
The WPWDKO is unique in the WPW series: it eliminates the motor coupling (IEC flange), eliminates the output coupling (hollow bore), AND supports vertical and non-standard mounting orientations (multi-direction housing). WPWDKO = no input coupling + no output coupling + any mounting angle. No other WPW product provides all three simultaneously. Keywords: zero-coupling multi-direction hollow shaft worm reducer, IEC flange hollow bore vertical worm gearbox.
Port & Crane — Rapid Motor Swap at Any Installation Angle
For crane hoist drum drives mounted at elevated, inclined, or vertical positions, the IEC motor flange enables motor replacement in under 15 minutes without disturbing the drum shaft connection — the hollow bore stays engaged while the motor is exchanged. This rapid swap capability is particularly valuable for port machinery where crane downtime is measured in lost ship turnaround revenue.
Correct Oil System for Zero-Coupling Vertical Service
The WPWDKO multi-face oil port system maintains correct gear mesh and bearing lubrication in vertical service with the hollow bore output — the position-specific oil fill instruction sheet specifies the correct port for each rated orientation, ensuring proper lubrication even at the most demanding vertical hollow bore service conditions.
Self-Locking Vertical Hollow Shaft Drive
At ratios ≥1/30, the WPWDKO self-locks in vertical orientation — preventing back-driving of crane hoist drums, ship winches, and vertical agitator shafts when the motor is de-energised. With the hollow bore rigidly engaged, self-locking holds the driven shaft securely without any separate parking brake in many applications.
H7 Precision Bore — No Field Reaming at Remote Installations
For crane and port machinery installations where field machining is impractical or impossible, the H7 ground bore accepts pre-ground drum shafts without any on-site bore correction — important for elevated or offshore installations where machine tools are unavailable.
0.12 to 15 kW Motor Range — All Crane Auxiliary Drives
Twelve sizes from 40 to 250 mm cover the complete range of crane auxiliary hollow shaft drives from small hatch cover mechanism motors (size 40, 0.12 kW) to large deck crane slewing drum drives (size 250, 15 kW).
Industry Applications
WPWDKO is the zero-coupling motor-direct hollow shaft solution for port, crane, marine, and elevated machinery requiring non-standard mounting orientations:
Port & Harbour Crane DrivesShip loader slewing hollow shaft drum drives, quay crane hoist drum hollow shaft drives, and harbour crane auxiliary hollow shaft drives requiring zero-coupling direct drum engagement at non-horizontal mounting angles.
Inclined Mine Hollow Shaft DrivesUnderground mine inclined conveyor hollow shaft drum motor-direct drives and mine hoist auxiliary hollow shaft drives where IEC motor-direct input AND hollow shaft direct drum engagement at inclined angles are both required.
Marine & Offshore Hollow Shaft DrivesShip winch drum hollow shaft motor-direct drives, offshore platform deck machinery hollow shaft drives, and marine hatch cover mechanism drives requiring zero-coupling compact drive assemblies at varied vessel structural angles.
Vertical Hollow Shaft Motor-Direct DrivesVertical pump hollow shaft motor-direct drives, vessel agitator hollow shaft motor-direct drives, and vertical process equipment where both IEC motor convenience AND hollow bore vertical shaft engagement are simultaneously needed.
Heavy Elevated Machine DrivesElevated production machine hollow shaft drives, overhead crane auxiliary motor-direct hollow shaft drives, and elevated structure machine drives requiring zero-coupling IEC motor input and hollow bore shaft output at non-standard mounting angles.
Rotating Equipment Hollow Shaft DrivesLarge rotating drum hollow shaft motor-direct drives, trommel screen direct hollow shaft motor drives, and large dryer drum motor-direct hollow shaft drives requiring zero-coupling input and output at varied installation angles.
Quality Control & Certification
ISO 9001:2015 & CE
Full ISO 9001:2015 QMS. CE Declaration of Conformity. Marine and port authority documentation packages (material certs, SGS/BV inspection) available. IEC flange CMM + bore H7 plug gauge + vertical oil fill all verified per unit.
Dual Interface + Multi-Position Test
Each WPWDKO: (1) IEC flange CMM (≤0.05 mm TIR); (2) bore H7 plug gauge + concentricity (≤0.05 mm TIR); (3) run test in horizontal AND vertical orientation — noise ≤72 dB(A), seal, torque ±5% in both; (4) vertical oil fill verified. Four checks, every unit.
Marine Classification Support
Material certs, SGS/BV inspection report, CE Declaration of Conformity, and vertical orientation oil fill documentation are all available on request to support marine classification society and offshore authority approval processes. We have supplied documentation packages to operators in Norway, Singapore, and the Gulf region.
Why Choose Ever-power for WPWDKO Gearboxes
We supply WPWDKO zero-coupling multi-direction hollow shaft worm gearboxes to port machinery builders, crane equipment manufacturers, and marine engineering companies in France, Canada, Saudi Arabia, Norway, and over 60 countries. Our four-check verification — IEC flange, bore H7, dual-orientation run test, and vertical oil fill confirmation — is the most comprehensive inspection standard in the WPW multi-direction hollow shaft product range.
- ✅ Four-check verification — flange + bore + dual run + vertical oil fill
- ✅ Marine classification documentation on request
- ✅ Custom bore diameters for non-standard crane drum shafts
- ✅ Position-specific oil fill sheet supplied with every unit
- ✅ 20+ years export record — France, Canada, Saudi Arabia, Norway and beyond
⭐ Customer Reviews
“We use WPWDKO on our ship loader slewing hollow shaft drum motor-direct drives. The IEC flange motor mounting means we can swap motors at the crane elevation in under 20 minutes, and the hollow bore mounts directly onto the drum shaft — no coupling hardware at height. The multi-direction mounting fits our crane frame geometry. The four-check inspection report satisfies our quality records.”
Peter N., Crane Systems Engineer
Port Equipment OEM, Port Hedland, Australia
“We integrate WPWDKO into our offshore platform deck winch hollow shaft motor-direct drives. The zero-coupling input and output combined with vertical mounting capability is unique. The marine classification documentation package from Ever-power supports our classification authority requirements. Consistent quality across multiple offshore project supply programmes.”
Erik J., Marine Engineer
Offshore Equipment Manufacturer, Stavanger, Norway
“WPWDKO on our quay crane hoist drum motor-direct drives. The IEC flange motor-direct input simplifies our crane drive maintenance in the harsh Red Sea coastal environment, and the hollow shaft bore engages our drum shafts directly. Multi-direction mounting fits our crane head geometry. Good quality, marine documentation available.”
Yousef M., Technical Manager
Port Infrastructure Equipment, Jeddah, Saudi Arabia
“We use WPWDKO for inclined mine hoist auxiliary hollow shaft motor-direct drives. The three-feature combination — zero coupling input, zero coupling output, inclined mounting — is what our mine hoist application needs. Good quality, bore H7 dimensions correct. Delivery to Canada is reliable. Would recommend for crane and hoist hollow shaft applications.”
Alex B., Project Engineer
Mining Equipment OEM, Vancouver, Canada
❓ Frequently Asked Questions
What is the difference between WPWDKO and WPWDK?
The WPWDK has IEC motor flange + hollow bore in a standard housing geometry. The WPWDKO has the same IEC flange and hollow bore but in a multi-direction housing supporting up to four mounting orientations including vertical, with reinforced output bearings and multi-face oil ports for each position. Choose WPWDK for standard horizontal or low-incline installations; choose WPWDKO when vertical or non-standard mounting orientations are required.
Can the WPWDKO motor be replaced without disturbing the drum shaft connection?
Yes — the IEC motor flange bolts are accessible from the motor side. The motor can be unbolted and the new motor inserted while the hollow bore output remains engaged on the drum shaft. For elevated or confined crane installations, this is a significant maintenance advantage: no drum shaft extraction, no drum shaft re-alignment required for a motor swap.
What is the maximum hollow bore diameter available for WPWDKO?
The largest standard bore is 110 mm for size 250. For large crane drum shaft applications with non-standard shaft diameters, custom bores are available for OEM orders — contact us with your drum shaft diameter and tolerance for availability confirmation and lead time.
Does the WPWDKO oil system work correctly in the vertical position with the hollow bore engaged?
Yes — the WPWDKO multi-face oil port system is configured for correct lubrication in vertical service with the hollow bore engaged. The vertical position oil fill instruction sheet specifies the correct fill port and level for the upright configuration. Confirm the correct oil fill position per the supplied instruction sheet at installation — do not use horizontal oil level instructions.
What marine classification documentation is available for WPWDKO?
On request: (1) material mill certificates for all major components; (2) SGS or BV third-party inspection report; (3) CE Declaration of Conformity; (4) vertical orientation oil fill documentation; (5) dual run test report (horizontal + vertical). These documents support marine classification society approval processes. Contact us with your classification requirements at order placement.
Zero Couplings + Any Mounting Angle — Get WPWDKO Quote
For port, crane, and marine hollow shaft drives requiring zero-coupling IEC input and hollow bore output at any mounting angle, the WPWDKO is the definitive solution. Our engineers will verify bore size, mounting position, and marine documentation requirements.
