Deskripsi
WPDKS Flange-Mounted Hollow Shaft Worm Gear Reducer with Cooling Fins
Closed-space continuous operation creates a thermal management challenge that standard gearboxes fail: as cycle frequency increases, oil temperature climbs and efficiency drops — until the unit overheats and fails. The WPDKS hollow shaft flange worm reducer solves this with an extended cast-iron cooling-fin housing that maximises natural convection, keeping oil temperature below 95 °C even in dense 24-hour paper and textile mill environments. Paired with direct motor flange coupling and a hollow output shaft, it delivers a maintenance-lean drivetrain purpose-built for wash-down, high-humidity, and rapid-cycle applications.
Technical Specifications
| Size | Input Power (kW) | Ratio | A (mm) | AB (mm) | B (mm) | H (mm) | HL (mm) | Hollow Bore S×W×Y | Weight (kg) |
|---|---|---|---|---|---|---|---|---|---|
| 40 | 0.12 | 1/5–1/60 | 135 | 75 | 85 | 138 | 40 | 16×6×18.8 | 5 |
| 50 | 0.18 | 1/5–1/60 | 151 | 83 | 105 | 176 | 50 | 20×6×22.8 | 8 |
| 60 | 0.37 | 1/5–1/60 | 167 | 91 | 110 | 207 | 60 | 25×8×28.3 | 10.5 |
| 70 | 0.37–0.75 | 1/5–1/60 | 200–202 | 109–111 | 130 | 238 | 70 | 30×8×33.3 | 14.5 |
| 80 | 0.75–1.5 | 1/5–1/60 | 225 | 125 | 150 | 270 | 80 | 35×10×38.3 | 22 |
| 100 | 1.5 | 1/5–1/60 | 280 | 148 | 160 | 334 | 100 | 40×12×43.3 | 38 |
| 120 | 2.2–3.0 | 1/5–1/60 | 333 | 181 | 175 | 423 | 120 | 45×14×48.8 | 60 |
| 135 | 3.0–4.0 | 1/5–1/60 | 375 | 202 | 210 | 482 | 135 | 60×18×64.4 | 85 |
| 155 | 4.0–5.5 | 1/5–1/60 | 425–448 | 224–247 | 256 | 541 | 155 | 70×20×74.9 | 120 |
| 175 | 5.5–7.5 | 1/5–1/60 | 481 | 262 | 282 | 600 | 175 | 80×22×85.4 | 150 |
| 200 | 7.5–11.0 | 1/5–1/60 | 516–543 | 258–285 | 320 | 677 | 200 | 85×22×90.4 | 218 |
| 250 | 11.0–15.0 | 1/5–1/60 | 615 | 330 | 400 | 824 | 250 | 110×28×116.4 | 350 |
ⓘ Input shaft speed reference: 1500 r/min. Maximum output torque 3025 N·m at size 250, ratio 1/60.
Product Structure & Cooling Design
The WPDKS distinguishes itself from the WPDKA through its extended cooling-fin housing geometry. Multiple cast-in longitudinal fins on both housing walls increase the effective surface area by approximately 40%, dramatically improving natural convection. This thermal engineering choice enables continuous 24/7 operation in enclosed spaces — paper mills, dyeing rooms, and wash-down production lines — without the need for forced-air cooling attachments.
Internally, the drivetrain mirrors the proven WPDKA design: a case-hardened alloy steel worm drives a phosphor-bronze wheel. The hollow output shaft is supported by pre-loaded angular-contact bearings. The motor bolts directly to the B5/B14 flange input face, creating a rigid, zero-coupling assembly. Oil-fill, drain, and breather ports are positioned to remain accessible regardless of mounting orientation.
Key Features & Benefits
Enhanced Thermal Management
Cast-in cooling fins increase surface area by ~40% versus a flat housing. Safe for continuous duty up to 95 °C oil temperature without auxiliary cooling — the critical advantage for paper and textile 24/7 lines.
Hollow Shaft Direct Fit
Hollow output bores (16–110 mm) slide onto the driven shaft without coupling sleeves. Reduces drivetrain length, eliminates coupling balancing issues, and simplifies swap-out on multi-station roll drives.
Precision Worm Gearing
Ground worm profile achieves DIN Class 7 accuracy. Running noise typically below 72 dB(A) at full load — important for textile weave hall compliance and paper mill operator comfort.
High-Frequency Start Capability
Designed for ≥12 starts per hour. The corrected torque formula accounts for load variation coefficients (a₂) up to 1.75 for heavy impact loads, giving engineers confidence in ratio and size selection.
Industry Applications
The WPDKS is the go-to flange worm reducer for high-frequency industrial processes where thermal overload is a constant risk.
Paper & Roll Drive Systems
Paper winding and unwinding stations generate sustained heat loads. WPDKS cooling fins prevent thermal runaway on multi-roll drive trains operating at continuous rated torque.
Textile & Dyeing Machines
Fabric dyeing jigs, tenter frames, and warp beam drives in humid environments. Fins shed moisture condensation; sealed hollow shaft resists lint ingress.
Food & Beverage Washing Lines
Bottle washing, crate cleaning, and produce conveying involve water spray and steam. The fin housing air-cools the gear oil while the double-lip seals keep water out.
Continuous Mixing Equipment
Chemical and pharmaceutical mixers running 24 hours demand sustained thermal stability. WPDKS maintains oil viscosity in the safe operating range without external coolers.
Quality & Certifications
✓ ISO 9001:2015 — Full QMS from raw castings to final test.
✓ CE Certified — Meets EU Machinery Directive; export documentation included.
✓ 100% Thermal & Leak Test — Each unit operated at rated load; housing temperature measured; zero-leak verified.
✓ FC25+ Cast Iron — Housing grade verified by mill certificate; Brinell hardness HB170–240 measured on each batch.
Why Choose Ever-power for WPDKS Reducers?
🏭 Dedicated Cooling-Fin Tooling
We maintain dedicated casting tooling for the WPDKS fin housing profile, ensuring dimensional consistency across production batches — critical for multi-unit OEM projects.
💼 Paper & Textile Industry References
We have supplied WPDKS units to major paper mills and textile manufacturers across Southeast Asia, Europe, and the Middle East. Engineering datasheets available on request.
🔧 Custom OEM Motor Flanges
We accommodate non-standard motor frame patterns. Simply provide your motor’s flange drawing and we will confirm compatibility or machine a custom adapter plate.
🚚 Bulk Stock & Fast Shipping
Sizes 40–175 are held in finished stock. Orders >20 units dispatched within 5 working days. Sea freight, air freight, and express courier options available.
What Our Customers Say
“We run our paper winding lines 24/7 at 120 °C ambient near the dryer section. The WPDKS is the first hollow-shaft reducer that hasn’t needed an emergency replacement in three years of service.”
🇫🇮 Marco B. — Maintenance Director, Turin, Italy
“The cooling fins were the deciding factor for our dyeing line upgrade. Previous reducers needed external fan kits. WPDKS runs cool with zero extras. Real cost savings over the project lifecycle.”
🇮🇩 Priya S. — Project Engineer, Tirupur, India
“Ordered 30 units for our bottle washing stations. The hollow bore fit our roller shafts perfectly and the noise level is noticeably lower than our old units. Would order again.”
🇦🇺 James W. — Engineering Manager, Sydney, Australia
“We specifically needed a gearbox rated for ≥12 starts per hour on our continuous mixing process. Ever-power’s selection guide and the WPDKS 120 ticked every box. Commissioning went perfectly.”
🇳🇱 Omar K. — Process Engineer, Rotterdam, Netherlands
Frequently Asked Questions
How do the cooling fins help in paper mill environments?
The longitudinal fins increase radiant and convective surface area by ~40% over a flat housing. In continuous-duty applications at elevated ambient temperatures, this keeps gear oil below 95 °C — the critical threshold for oil viscosity and seal integrity — without requiring external cooling fans or water jackets.
Is the WPDKS interchangeable with the WPDKA?
The mounting footprint, flange pattern, and hollow bore diameter are identical between WPDKA and WPDKS for each size. The external envelope of the WPDKS is slightly larger due to the fins, so verify clearance before swapping. Torque and ratio data are identical.
What oil do you recommend for wet or humid environments?
We recommend fully synthetic ISO VG 220 or 320 gear oil with anti-rust and anti-corrosion additives. Synthetic oils also improve seal compatibility and extend change intervals to up to 5000 hours in continuous duty.
Can the WPDKS be mounted vertically (motor above)?
Yes. Multiple shaft-direction configurations (A through F) are available, including vertical motor-up and motor-down orientations. Ensure the oil fill level is adjusted per the shaft-direction table in the installation manual when mounting non-horizontally.
What is the minimum order quantity?
There is no minimum order quantity for standard sizes. Single units are welcome for trials or spare parts. OEM bulk pricing is available from 10 units; volume discounts increase at 50, 100, and 500+ units.
Upgrade Your Continuous-Duty Drives with WPDKS
Our engineering team will help you select the correct size and ratio for your application. Visit our factory overview or contact us for technical consultation, pricing, and delivery terms. Email: [email protected]
