Description
WPWDKS Flange-Mounted Universal Hollow Shaft Worm Gear Reducer with Cooling Fins — The Ultimate Thermal Solution for Continuous Zero-Coupling Hollow Shaft Drives
The WPWDKS addresses a specific challenge that no other WPW product resolves: continuous heavy-duty service on a motor-direct hollow shaft drive in a hot industrial environment. The motor generates heat at the input; the gear mesh generates heat internally; the hot ambient adds heat externally. Without thermal management, oil temperature climbs, lubricant degrades, and production stops. The WPWDKS adds cast-integral cooling fins to the WPWDKA four-feature platform — reducing oil sump temperature approximately 15°C lower than the smooth-body WPWDKA at rated load.
The result is the highest-specification motor-direct hollow shaft universal worm gearbox in the WPW series: IEC motor-direct input, H7 hollow bore output, extended multi-direction output reach, universal base, AND thermal stability for 24/7 hot-environment service. Motors 0.12–15 kW, bore 18–110 mm, ratios 1/5–1/60. எவர்-பவர் பற்றி | Request a Thermal Assessment
Technical Specifications
WPWDKS shares specification drawing with WPWDKA. HL = height including fins (greater than WPWDKA). All other dimensions identical — direct thermal upgrade with HL clearance check. Reference speed 1500 r/min. All dimensions mm.
| Size | Power(kW) | Ratio | A | AB | B | AC | BC | CC | HL | LL | H | M | N | E | F | 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 | 95 | 61 | 40 | 45 | 60 | 135 | 100 | 130 | 80 | 110 | 10 | 10 | 115 | 95 | 140 | 4 | M8 | 31 | 11 | 4×12.8 | 18 | 6×22.8 | 5 | |
| 50 | 0.18 | 151 | 83 | 105 | 111 | 68 | 60 | 80 | 93 | 195 | 130 | 150 | 100 | 105 | 120 | 18 | 12 | 115 | 95 | 140 | 4 | M8 | 31 | 11 | 4×12.8 | 20 | 6×22.8 | 8 | |
| 60 | 0.37 | 167 | 91 | 110 | 127 | 76 | 60 | 80 | 93 | 195 | 130 | 150 | 100 | 105 | 120 | 18 | 12 | 130 | 110 | 160 | 4 | M8 | 33 | 14 | 5×16.3 | 25 | 8×28.3 | 12.5 | |
| 70 | 0.37/0.75 | 200/202 | 109/111 | 130 | 152 | 86 | 70 | 73 | 108 | 233 | 150 | 190 | 115 | 150 | 18 | 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 | 169 | 102 | 80 | 83 | 123 | 268 | 170 | 220 | 135 | 180 | 18 | 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 | 216 | 117 | 100 | 100 | 150 | 330 | 190 | 270 | 155 | 220 | 20 | 15 | 165 | 130 | 200 | 4.5 | M10 | 52 | 24 | 8×27.3 | 40 | 12×43.3 | 41.5 | ||
| 120 | 2.2/3.0 | 333 | 181 | 175 | 256 | 124 | 120 | 120 | 180 | 395 | 230 | 320 | 180 | 260 | 25 | 18 | 215 | 180 | 250 | 5 | M12 | 63 | 28 | 8×31.3 | 45 | 14×48.8 | 60 | ||
| 135 | 3.0/4.0 | 375 | 202 | 210 | 296 | 147 | 135 | 135 | 215 | 450 | 250 | 350 | 200 | 290 | 30 | 18 | 215 | 180 | 250 | 5 | M12 | 63 | 28 | 8×31.3 | 60 | 18×64.4 | 90 | ||
| 155 | 5.5 | 448 | 247 | 256 | 345 | 185 | 155 | 135 | 235 | 493 | 280 | 380 | 220 | 320 | 32 | 21 | 265 | 230 | 300 | 5 | M12 | 83 | 38 | 10×41.3 | 70 | 20×74.9 | 118 | ||
| 175 | 7.5 | 481 | 262 | 282 | 374 | 192 | 175 | 160 | 260 | 558 | 310 | 410 | 250 | 350 | 37 | 21 | 265 | 230 | 300 | 5 | M12 | 83 | 38 | 10×41.3 | 80 | 22×85.4 | 167 | ||
| 200 | 11.0 | 543 | 285 | 320 | 412 | 230 | 200 | 175 | 290 | 620 | 355 | 445 | 290 | 390 | 45 | 24 | 300 | 250 | 350 | 6 | M16 | 114 | 42 | 12×45.3 | 85 | 22×90.4 | 237 | ||
| 250 | 11.0/15.0 | 615 | 330 | 400 | 500 | 285 | 250 | 200 | 350 | 750 | 460 | 560 | 380 | 480 | 50 | 28 | 300 | 250 | 350 | 6 | M16 | 114 | 42 | 12×45.3 | 110 | 28×116.4 | 395 |
* Shared drawing with WPWDKA. HL = height including cooling fin array — greater than WPWDKA. All base, flange, bore, and shaft dimensions identical to WPWDKA — direct thermal upgrade with HL height clearance verification.
Product Structure — Five Features in One Casting
The WPWDKS extends the WPWDKA four-feature platform with a cast-integral longitudinal fin array on the housing top and outer side faces — the fifth feature. All five are integral to the same FC25 casting: IEC flange, hollow bore, extended output body, universal base, and cooling fins. No bolt-on accessories, no vibration loosening risk, permanent thermal performance.
| Feature 1 | IEC motor flange — no input coupling |
| Feature 2 | H7 hollow bore — no output coupling |
| Feature 3 | Extended body (LL) — multi-direction output reach |
| Feature 4 | Universal flanged base — multi-orientation mounting |
| Feature 5 | Cast-integral fins — ~15°C lower vs WPWDKA at rated load |
| Upgrade Path | Direct drop-in for WPWDKA — verify HL clearance only |
✅ Key Features & Benefits
Five Heat Sources — One Integrated Thermal Solution
A WPWDKA in hot continuous service faces: motor winding heat, gear mesh heat, and high ambient. The WPWDKS fin array is the only WPW product feature that manages all three simultaneously while retaining zero-coupling motor-direct hollow bore output. No other product in the WPW DK series has this capability. Keywords: motor-direct hollow shaft finned universal worm reducer, thermal zero-coupling worm gearbox.
Highest Specification in the WPW Series
With five integral features — IEC flange, hollow bore, extended output, universal base, and cooling fins — the WPWDKS is the highest-specification product in the entire WPW series. It is selected when the application demands maximum feature integration: continuous duty, hot environment, zero couplings, extended hollow bore reach, and multi-orientation mounting simultaneously.
Extended Lubricant Life Under Motor + Gear Heat
Reducing oil temperature by ~15°C approximately doubles lubricant oxidation life. In motor-direct applications the combined motor and gear heat load is higher than standard — the WPWDKS thermal advantage is especially significant here, extending oil drain intervals from ~2,500 to potentially 4,000+ hours in continuous hot-environment service.
Direct Thermal Upgrade from WPWDKA
All WPWDKS dimensions (flange, base, bore, shaft) are identical to WPWDKA. Where a WPWDKA is experiencing overtemperature in continuous hot-environment service, WPWDKS is the minimum-disruption upgrade — verify HL clearance and replace in place.
Permanent Fins for Industrial Durability
Cast-integral fins cannot loosen under the vibration and thermal cycling of steel mills, cement plants, or outdoor tropical installations. Permanent thermal performance throughout the service life with no fin-related maintenance — critical for 24/7 continuous production environments where gearbox maintenance is scheduled, not reactive.
60-Minute Thermal Test at 110% Torque — Every Unit
Unlike competitors who thermal-test only sample units, every WPWDKS undergoes a 60-minute thermal stability test at 110% rated torque. Pass criterion: oil temperature ≤90°C — providing 5°C safety margin below the 95°C maximum. This test verifies the fin array is working correctly on every unit before shipment.
Industry Applications
WPWDKS is specified when all five features — motor-direct, hollow bore, extended reach, universal base, and thermal management — are simultaneously required:
Steel Mill Hollow Shaft DrivesHot rolling mill auxiliary hollow shaft roller drives and steel plant conveyor hollow shaft motor-direct drives in hot plant rooms requiring continuous operation with zero coupling maintenance.
Cement & Lime Plant DrivesIEC motor-direct hollow shaft conveyor drives in cement plant hot environments where the combination of motor heat, gear heat, and 43°C+ ambient demands the thermal headroom of the WPWDKS.
Hot-Climate Mining EquipmentMotor-direct hollow shaft mine conveyor drives in tropical mining operations where 40°C+ outdoor ambient combined with motor and gear heat approaches the WPWDKA thermal limit.
Textile & Heavy ManufacturingHeavy textile machinery IEC motor-direct hollow shaft drives and continuous manufacturing line hollow shaft drives in enclosed warm plant rooms requiring 24/7 thermal stability.
Continuous Process Hollow Shaft DrivesContinuous chemical process hollow shaft agitator drives and reactor feed hollow shaft conveyor drives in enclosed plants where motor-direct zero-coupling convenience must be sustained 24/7.
Biomass & Energy FacilitiesBiomass handling facility motor-direct hollow shaft conveyor drives and bioenergy plant auxiliary drives in warm outdoor or enclosed environments requiring all five WPWDKS features for continuous operation.
Quality Control & Certification — The Highest Standard in WPW DK Series
ISO 9001:2015 & CE
Full ISO 9001:2015 QMS. CE Declaration of Conformity. Fin casting inspected at foundry stage. IEC flange CMM; bore H7 plug gauge + concentricity; extended shaft tip run-out — all verified before the thermal run.
️ Full Thermal + Triple Interface Verification
Each WPWDKS undergoes: (1) IEC flange CMM; (2) bore H7 gauge + concentricity CMM; (3) extended shaft tip run-out CMM; (4) 60-min thermal run at 110% torque — pass ≤90°C; (5) noise, seal, torque re-check post-thermal. Five verification steps — the most comprehensive in the WPW series.
ROI Documentation Available
For engineering procurement decisions between WPWDKA and WPWDKS, we can provide a 36-month TCO comparison model showing: thermal stop elimination value, extended lubricant interval savings, and coupling elimination savings vs the WPWDKS unit price premium. Contact us for your specific operating profile.
Why Choose Ever-power for WPWDKS Gearboxes
We supply WPWDKS thermally optimised motor-direct hollow shaft universal worm gearboxes to steel plant equipment builders, cement industry machinery OEMs, and continuous process equipment manufacturers in Japan, the UK, Australia, India, and over 60 countries. Our five-step verification standard — the most comprehensive in the WPW range — is our commitment to the demanding production environments where WPWDKS is specified.
- ✅ Five-step verification standard — the most comprehensive in WPW series
- ✅ 60-min thermal run at 110% torque — pass ≤90°C, every unit
- ✅ TCO comparison documentation available vs WPWDKA
- ✅ Foundry-stage fin geometry inspection before machining
- ✅ 20+ years export record — Japan, UK, Australia, India and beyond
⭐ Customer Reviews
“We upgraded our hot rolling mill hollow shaft roller drives from WPWDKA to WPWDKS. The thermal improvement is exactly as claimed — 14°C cooler at our plant room summer temperature. Zero overtemperature stops in 15 months since the upgrade. The IEC flange motor-direct convenience and hollow shaft direct roller engagement remain, and we’ve eliminated our two most common maintenance events simultaneously.”
Andrew S., Plant Engineer
Steel Works, Wollongong, Australia
“We specify WPWDKS for all motor-direct hollow shaft drives on our cement plant conveyor equipment for hot-climate markets. The five-feature specification addresses the combined challenges of cement plant environments: motor heat, gear heat, 42°C+ ambient, hollow shaft drum engagement, and varied installation angles. The 60-min thermal test report is a valued quality document.”
Yuki N., Drive Systems Engineer
Cement Equipment Manufacturer, Osaka, Japan
“We use WPWDKS on our continuous chemical process hollow shaft agitator drives in a warm enclosed plant room. The finned housing manages the combined motor and gear heat under our 24/7 duty cycle. The extended hollow bore output reaches our deep vessel agitator stubs correctly. The five-step verification documentation is the most thorough we have received from any gearbox supplier.”
Michael F., Maintenance Engineer
Continuous Process Plant, Yorkshire, UK
“WPWDKS on our heavy textile machinery hollow shaft motor-direct drives. Our plant room reaches 44°C in summer and the WPWDKA units we used previously required more frequent oil changes. The WPWDKS units run cooler and our oil change intervals have extended noticeably. Good quality from Ever-power. Delivery to India is reliable.”
Rajesh N., Plant Manager
Textile Mill, Gujarat, India
❓ Frequently Asked Questions
What is the difference between WPWDKS and WPWDKA?
WPWDKS and WPWDKA have identical dimensions (shared specification drawing) and both integrate IEC motor flange, hollow bore, extended multi-direction output, and universal base. The WPWDKS additionally has cast-integral cooling fins that reduce sustained oil temperature by ~15°C. Choose WPWDKA for standard duty; choose WPWDKS for continuous duty in hot environments (above 38°C ambient at rated motor-direct load).
How does the WPWDKS manage all three heat sources simultaneously?
The fin array is sized for the combined thermal load of: (1) motor winding heat conducted through the IEC flange into the housing; (2) gear mesh heat generated internally; (3) ambient heat conducted into the housing surface. In our 60-minute thermal test, all three sources are present simultaneously (motor running at 110% load in rated ambient), and the fin array must reduce this combined load sufficiently to hold oil temperature ≤90°C.
At what ambient temperature can the WPWDKS operate continuously?
With standard ISO VG 320 mineral oil, WPWDKS typically operates at rated motor-direct load continuously up to 43–45°C ambient without exceeding 95°C oil temperature. With synthetic PG ISO VG 460 oil, this extends to ~48–50°C. Contact us for a precise calculation for your motor power, ratio, and ambient conditions.
Can I replace a WPWDKA with a WPWDKS without changing the motor or machine structure?
Yes — all motor flange and base footprint dimensions are identical. The only difference is the increased HL (housing height due to cooling fins). Measure the available clearance above your existing WPWDKA before ordering the WPWDKS thermal upgrade.
Is the 60-minute thermal run standard on all WPWDKS units?
Yes — the 60-minute 110% torque thermal run with pass criterion ≤90°C is performed on every WPWDKS unit before shipment, not just on sample units. The test result is recorded and available in the shipment documentation on request. This is the key quality assurance differentiator for the WPWDKS in the WPW DK series.
The Highest WPW Specification for Hot Continuous Service — Get WPWDKS Quote
When your continuous motor-direct hollow shaft drive in a hot environment demands zero-coupling simplicity, extended output reach, and thermal stability all together, the WPWDKS is the answer. Request a free thermal calculation and TCO comparison.
