Description
WPEDKS Flange-Mounted Hollow Shaft Double Speed Worm Gear Reducer with Cooling Fins — The Ultimate Specification for 24/7 Heavy Industry Zero-Coupling Drives
The WPEDKS is the most fully specified product in the entire WPE double-speed range — combining four engineering features that each independently address a real heavy industry challenge: an IEC motor flange (eliminating motor coupling), a two-stage worm cascade (1/200–1/900 ultra-high ratio), an H7 hollow output bore (eliminating output coupling), and an integral cooling fin array (managing the combined heat of motor + two gear meshes). No other WPE product combines all four features simultaneously.
The WPEDKS is the definitive drive for steel mill 24/7 roller table drives, continuous paper mill auxiliary systems, and heavy textile machinery where zero couplings, ultra-high ratios, AND sustained thermal stability under continuous maximum load must all be guaranteed simultaneously. Available in 9 size groups, motors 0.12–5.5 kW, bore 30–110 mm, ratios 1/200–1/900. About Ever-power | Request Engineering Consultation
Technical Specifications
WPEDKS shares the WPEDKA base footprint with increased HL due to integral fin array. Motor flange: LA, LB, LC, LE, LZ per IEC 60034-7. Hollow bore: S (H7); W×Y = keyway. All in mm; reference speed 1500 r/min.
| Size | Power(kW) | Ratio | A | AB | B | BE | HL | LL | H | M | N | E | F | G | Z | LA | LB | LC | LE | LZ | Q | U | T×V | S(bore) | W×Y(keyway) | Wt(kg) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 40-70 | 0.12 | 1/200–1/900 | 314 | 153 | 130 | 75 | 215 | 105 | 238 | 150 | 190 | 115 | 150 | 20 | 15 | 115 | 95 | 140 | 4 | M8 | 31 | 11 | 4×12.8 | 30 | 8×33.3 | 19 |
| 50-80 | 0.18 | 314 | 144 | 150 | 83 | 130 | 160 | 268 | 170 | 220 | 135 | 180 | 20 | 15 | 115 | 95 | 140 | 4 | M8 | 31 | 11 | 4×12.8 | 35 | 10×38.3 | 27 | |
| 60-100 | 0.37 | 1/200 | 387 | 175 | 160 | 91 | 310 | 150 | 334 | 190 | 270 | 155 | 220 | 25 | 15 | 130 | 110 | 160 | 4 | M8 | 33 | 14 | 5×16.3 | 40 | 12×43.3 | 45 |
| 70-120 | 0.37/0.75 | 1/300–1/400 | 425/445 | 193 | 175 | 109/111 | 370 | 180 | 423 | 230 | 320 | 180 | 260 | 30 | 18 | 130/165 | 110/130 | 160/200 | 4 | M8/M10 | 40/42 | 14/19 | 5×16.3/6×21.8 | 45 | 14×48.8 | 75 |
| 80-135 | 0.75/1.5 | 1/500–1/600 | 499 | 226 | 210 | 125 | 430 | 215 | 482 | 250 | 350 | 200 | 290 | 30 | 18 | 165 | 130 | 200 | 4.5 | M10 | 48/52 | 19/24 | 6×21.8/8×27.3 | 60 | 18×64.4 | 103 |
| 100-155 | 1.5 | 1/800 | 570 | 269 | 256 | 148 | 490 | 235 | 541 | 275 | 390 | 220 | 320 | 35 | 21 | 165 | 130 | 200 | 4.5 | M10 | 52 | 24 | 8×27.3 | 70 | 20×74.9 | 147 |
| 120-175 | 2.2/3.0 | 1/900 | 631 | 287 | 282 | 181 | 555 | 260 | 600 | 310 | 430 | 250 | 350 | 40 | 21 | 215 | 180 | 250 | 5 | M12 | 63 | 28 | 8×31.3 | 80 | 22×85.4 | 204 |
| 135-200 | 3.0/4.0 | 580 | 318 | 320 | 202 | 625 | 290 | 677 | 360 | 480 | 290 | 390 | 40 | 24 | 215 | 180 | 250 | 5 | M12 | 63 | 28 | 8×31.3 | 85 | 22×90.4 | 298 | |
| 155-250 | 5.5 | 815 | 380 | 400 | 247 | 755 | 350 | 824 | 460 | 560 | 380 | 480 | 45 | 28 | 265 | 230 | 300 | 5 | M12 | 83 | 38 | 10×41.3 | 110 | 28×116.4 | 470 |
* HL = total housing height including fin array; larger than WPEDKA equivalent. All other dimensions (footprint, flange, bore) identical to WPEDKA — direct thermal upgrade with HL clearance verification. Both IEC flange and hollow bore dimensions per IEC 60034-7 and H7 standards respectively.
Product Structure — Four Features in One Cast Iron Casting
The WPEDKS combines four integral features in a single FC25 cast iron casting: an IEC motor flange at the first-stage input, a two-stage worm cascade, an H7 hollow output bore at the second-stage, and a cast-integral longitudinal fin array on the top and side housing faces. All four features are part of the original casting — no bolt-on components, no secondary bonding, no vibration risk at any interface.
| Feature 1 | IEC 60034-7 motor flange — no input coupling |
| Feature 2 | Two worm-and-wheel stages — ratio 1/200–1/900 |
| Feature 3 | H7 hollow output bore + keyway — no output coupling |
| Feature 4 | Cast-integral fins — manages motor + dual gear-stage heat simultaneously |
| Thermal Gain | ~18°C lower than WPEDKA — essential for 24/7 heavy process operation |
| Drop-in Upgrade | Identical footprint and interface dims to WPEDKA — verify HL clearance |
✅ Key Features & Benefits
Four-Feature Integration — The Highest Specification in WPE
The WPEDKS simultaneously provides: no input coupling (IEC flange), no output coupling (hollow bore), extreme reduction ratio 1/200–1/900 (two-stage), and thermal stability for continuous maximum-load operation (fin array). This is the only product in the WPE series — or any comparable product range — that provides all four simultaneously. Keywords: motor-direct hollow shaft finned double speed worm gearbox, four-feature two-stage reducer.
Manages Four Simultaneous Heat Sources
Motor winding heat + first-stage gear mesh heat + second-stage gear mesh heat + all in an enclosed housing = the most demanding thermal scenario in the WPE range. The WPEDKS fin array is specifically sized for this four-source load, maintaining oil sump temperature ≤95°C at rated load in up to 45°C ambient — the only product in the WPE range that can make this claim at full zero-coupling two-stage operation.
Zero Couplings — Simplest Drive Chain for 24/7 Lines
For steel mill and paper mill 24/7 continuous process lines where every unplanned stop is measured in thousands of dollars per hour, the WPEDKS eliminates the two most common coupling-related failure modes (wear and misalignment) from the drive chain. Combined with the thermal stability that prevents overtemperature stops, the WPEDKS is the maximum-reliability drive configuration.
Permanent Cast-Integral Fins — Zero Thermal Degradation
Fins integral to the housing casting cannot loosen, detach, corrode separately, or degrade thermally. For steel mill and paper mill environments where vibration, heat cycling, and periodic cleaning are part of normal operation, permanent fins provide consistent thermal performance over the entire service life.
Best Total Cost of Ownership in the WPE Range
The WPEDKS carries the highest unit price in the WPE range. It also delivers the lowest total cost of ownership for 24/7 heavy process applications: zero coupling replacement, zero overtemperature stops, minimum motor maintenance via IEC flange, and extended lubricant drain intervals from reduced oil temperatures. For high-OEE production lines, payback vs WPEDKA is typically 12–24 months.
Direct Upgrade from WPEDKA
The WPEDKS is a dimensional drop-in for the WPEDKA — same base footprint, same IEC flange, same hollow bore dimensions. For any WPEDKA installation experiencing coupling wear, overtemperature stops, or both simultaneously, the WPEDKS resolves both problems in a single product upgrade.
Industry Applications
The WPEDKS is the premium specification for 24/7 continuous drives requiring zero couplings at both ends AND sustained thermal stability:
Steel Mill 24/7 Roller DrivesHot rolling mill table roller hollow-shaft auxiliary drives, slab pusher drives, and continuous casting line auxiliary drives operating three shifts in high-ambient-temperature steel plant environments where zero couplings and thermal stability are both mandatory.
Paper Mill Continuous LinesPress section felt roll drives, dryer section auxiliary drives, and continuous paper machine winder drives requiring zero-coupling direct shaft mounting AND thermal stability during extended continuous production runs.
Textile Heavy MachineryHeavy industrial loom auxiliary drives, large tenter frame chain drives, and industrial warping machine hollow-shaft drives operating in textile factories where continuous operation, zero couplings, and thermal management are simultaneously required.
Hot Ambient Process IndustryAny industrial drive in a hot plant room (steel, glass, rubber, cement) where the combination of motor heat, two-stage gear heat, and high ambient temperature exceeds the WPEDKA’s thermal capacity, and the application also requires zero-coupling hollow shaft direct mounting.
High-OEE Production LinesAutomotive components manufacturing lines, electronics production conveyors, and any high-OEE facility where the WPEDKS’s elimination of both coupling maintenance AND overtemperature stops justifies its premium price through measurable uptime improvement.
New Energy ManufacturingEV battery production line hollow-shaft conveyor drives, solar panel manufacturing line drives, and wind turbine component assembly conveyor drives in enclosed factories requiring the maximum-specification zero-coupling continuous drive.
Quality Control & Certification — The Highest Standard in WPE
ISO 9001:2015 & CE
Full ISO 9001:2015 QMS. CE Declaration of Conformity. Fin casting inspected at foundry stage. IEC flange CMM verified. Hollow bore H7 plug gauged. All three verifications before machining and before run test.
️ Four-Feature Full Verification
The most comprehensive inspection in the WPE range: (1) IEC flange CMM (≤0.05 mm TIR), (2) hollow bore H7 plug gauge + concentricity, (3) 90-min thermal run at 110% torque, (4) post-thermal bore re-measurement confirming no thermal distortion of H7 bore. Only the WPEDKS receives all four checks.
Material & ROI Documentation
Housing: FC25 cast iron. Both worm shafts: 20CrMnTi (≥58 HRC). Both wheel rims: ZCuSn10Pb1. Material certs, SGS/BV inspection, and an ROI analysis comparing WPEDKS total cost of ownership vs WPEDKA over 36 months of 24/7 operation — available on request for procurement decision support.
Why Choose Ever-power for WPEDKS Gearboxes
We supply WPEDKS gearboxes to steel mill equipment builders, paper machine OEMs, and heavy textile machinery manufacturers in the UK, France, Japan, Australia, and over 60 countries. The WPEDKS is our most complex product to manufacture and inspect — and we apply correspondingly our most rigorous verification standard, because the customers who specify it do so because they genuinely cannot afford any failure in their 24/7 production environments.
- ✅ Four-check inspection standard — flange, bore, 90-min thermal, post-thermal bore re-check
- ✅ ROI documentation available for procurement decision support
- ✅ In-house foundry + CNC + internal grinding — all four features under quality control
- ✅ Steel, paper & textile industry expertise — we understand 24/7 heavy duty requirements
- ✅ 20+ years export record — UK, France, Japan, Australia and beyond
⭐ Customer Reviews
“We upgraded our hot rolling mill table roller auxiliary drives from WPEDKA to WPEDKS. The result was transformational — zero overtemperature stops in 18 months of continuous 24/7 operation (we previously had 3–4 per month in summer), and the zero-coupling design has eliminated our main coupling maintenance call-out on this line. Best drive decision we have made in five years.”
James F., Maintenance Manager
Integrated Steel Works, Port Kembla, Australia
“We use WPEDKS for our press section hollow-shaft drive rolls on our continuous paper machine. The four-feature combination is unique — IEC flange motor mounting, 1/600 hollow shaft roll drive, and cooling fins that handle our hot machine room ambient temperatures. Zero coupling maintenance, zero overtemperature stops in two years. The 90-minute thermal run test report is a reassuring piece of quality documentation.”
Pierre M., Drive Engineer
Paper Mill, Alsace, France
“We integrate WPEDKS into our heavy industrial weaving machine auxiliary drives. The four-feature specification matches exactly what our customers in Southeast Asian textile factories need: IEC flange quick motor swap, hollow shaft direct loom drive, 1/800 ratio, and fins for their 40°C+ factory ambient. Consistent quality from Ever-power batch after batch.”
Takeshi N., Engineering Director
Textile Machinery Manufacturer, Kyoto, Japan
“WPEDKS for our continuous chemical process hollow-shaft agitator drives. The four features together represent exactly the right specification for our 24/7 plant. Post-thermal bore re-measurement report was a novel quality document we had not seen from other suppliers — very valuable for our equipment qualification records. Slight premium price but well justified by performance.”
Andrew S., Plant Engineer
Continuous Process Plant, Yorkshire, UK
❓ Frequently Asked Questions
What is the difference between WPEDKS and WPEDKA?
The WPEDKA has IEC motor flange, two-stage ratio, and hollow bore in a smooth-body housing. The WPEDKS adds integral cooling fins that reduce sustained oil temperature by ~18°C. All flange, bore, footprint, and shaft dimensions are identical. Choose WPEDKA for standard duty; choose WPEDKS when the combination of motor heat and two-stage gear heat in 24/7 or high-ambient operation approaches the smooth-body thermal limit.
What is the ROI of specifying WPEDKS over WPEDKA for a 24/7 steel mill application?
In a 24/7 steel mill application, the WPEDKS typically recovers its price premium through: (1) elimination of ~3–4 overtemperature stops per year (each stop = production loss + restart cost), (2) extended lubricant drain intervals (2,500 → 3,500+ hours) reducing oil change labour, (3) elimination of coupling maintenance (~2 couplings/year per drive point in continuous service). Combined, these savings typically recover the WPEDKS premium within 12–18 months. We can model this for your specific application — contact us.
Is the WPEDKS really necessary for a 24/7 application if ambient temperature is only 25°C?
At 25°C ambient with a 24/7 duty cycle, the WPEDKA may operate adequately within its 95°C oil temperature limit. We recommend a thermal calculation for your specific motor power, ratio, and ambient before deciding between WPEDKA and WPEDKS. For size 80-135 and above at high-torque 1/600–1/900 ratios in continuous 24/7 service, we generally recommend WPEDKS even at moderate ambient temperatures — contact our engineers for a free calculation.
Does the WPEDKS post-thermal bore re-measurement guarantee H7 tolerance after thermal loading?
Yes — the post-thermal bore re-measurement confirms that the H7 tolerance is maintained after the 90-minute 110% torque thermal test. We include this measurement result in the shipment documentation for each WPEDKS unit. For the most demanding applications, this provides engineering confirmation that the bore will accept the driven shaft correctly even after the unit has reached thermal equilibrium in service.
Can the WPEDKS be used with synthetic lubricants for extended drain intervals?
Yes, and it is strongly recommended for 24/7 heavy duty applications. With synthetic PAG ISO VG 460 oil, drain intervals for the WPEDKS in continuous heavy duty service can extend to 5,000+ hours, compared to 2,500 hours for mineral ISO VG 320. PAG oil also has a lower friction coefficient than mineral oil — reducing gear mesh heat generation AND managing it more effectively. Contact us for lubricant selection guidance for your specific operating conditions.
The Ultimate 24/7 Drive Specification — Request WPEDKS Consultation
For production lines where zero coupling maintenance, zero overtemperature stops, and ultra-high ratio hollow shaft drive are all non-negotiable requirements, the WPEDKS is the only product that delivers all four simultaneously. Contact our engineers for a free thermal calculation and ROI analysis for your specific application.
