Description
WPEKS Hollow Shaft Double Speed Worm Gear Reducer with Cooling Fins — Thermally Stable Coupling-Free Ultra-High Ratio Drive for Continuous Food, Brewing & Chemical Applications
Food processing vessel drives, industrial brewing systems, and continuous chemical agitators share three requirements simultaneously: coupling-free shaft connection (for maintenance simplicity and hygiene), ultra-high reduction ratios (1/200–1/900) for very slow impeller speeds, and thermal stability during long continuous production shifts. The WPEKS hollow shaft double speed worm gear reducer with cooling fins is the purpose-designed solution that satisfies all three requirements in a single cast iron unit.
The integral cooling fin array maintains oil sump temperature approximately 18°C lower than the equivalent smooth-body WPEKA at rated load — critical for brewing fermentation, food blending, and continuous chemical vessel drives where overtemperature stops cause batch loss or product contamination. Available in 9 size groups, bore diameters 30–110 mm, ratios 1/200–1/900. About Ever-power | Request a Thermal Assessment
Technical Specifications
WPEKS shares the WPEKA base footprint with increased housing height (HL) due to integral fin array. S = hollow bore (H7); W×Y = bore keyway. HH = lateral height offset. All dimensions in mm; reference speed 1500 r/min.
| Size | Ratio | A | AA | AB | B | BE | HH | HL | LL | H | M | N | E | F | G | Z | HS | U | T×V | S(bore) | W×Y(keyway) | Wt(kg) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 40-70 | 1/200–1/900 | 286 | 195 | 153 | 130 | 87 | 35 | 215 | 105 | 238 | 150 | 190 | 115 | 150 | 20 | 15 | 25 | 12 | 4×2.5 | 30 | 8×33.3 | 20 |
| 50-80 | 297 | 197 | 144 | 150 | 108 | 35 | 250 | 120 | 273 | 170 | 220 | 135 | 180 | 20 | 15 | 30 | 12 | 4×2.5 | 35 | 10×38.3 | 27 | |
| 60-100 | 363 | 231 | 175 | 160 | 120 | 42 | 310 | 150 | 334 | 190 | 270 | 155 | 220 | 25 | 15 | 40 | 15 | 5×3 | 40 | 12×43.3 | 44 | |
| 70-120 | 408 | 256 | 193 | 175 | 140 | 55 | 370 | 180 | 430 | 230 | 320 | 180 | 260 | 30 | 18 | 40 | 18 | 5×3 | 45 | 14×48.8 | 73 | |
| 80-135 | 471 | 298 | 226 | 210 | 160 | 65 | 430 | 215 | 480 | 250 | 350 | 200 | 290 | 30 | 18 | 50 | 22 | 7×4 | 60 | 18×64.4 | 101 | |
| 100-155 | 555 | 354 | 269 | 256 | 190 | 80 | 490 | 235 | 531 | 275 | 390 | 220 | 320 | 35 | 21 | 50 | 25 | 7×4 | 70 | 20×74.9 | 144 | |
| 120-175 | 598 | 379 | 287 | 282 | 219 | 95 | 555 | 260 | 600 | 310 | 430 | 250 | 350 | 40 | 21 | 65 | 30 | 7×4 | 80 | 22×85.4 | 201 | |
| 135-200 | 662 | 425 | 318 | 320 | 256 | 105 | 625 | 290 | 666 | 360 | 480 | 290 | 390 | 40 | 24 | 75 | 35 | 10×4.5 | 85 | 22×90.4 | 293 | |
| 155-250 | 795 | 510 | 380 | 400 | 295 | 103 | 755 | 350 | 800 | 460 | 560 | 380 | 480 | 45 | 28 | 85 | 40 | 12×5 | 110 | 28×116.4 | 462 |
* HL = total height including fin array. WPEKS and WPEKA share identical base footprint, bore dimensions, and input shaft dimensions — WPEKS is a direct thermal upgrade with fin array height clearance verification required.
Product Structure — Two-Stage Hollow Bore + Integral Fin System
The WPEKS integrates three features in one casting: the two-stage worm cascade delivering 1/200–1/900 combined ratio, the H7 precision hollow output bore for coupling-free shaft mounting, and cast-integral longitudinal cooling fins on the top and side housing faces. All three are part of the original casting — no bolt-on additions, no vibration risk, permanent thermal and bore performance throughout the service life.
| Drive Stages | Two worm-and-wheel pairs in series; ratio 1/200–1/900 |
| Output Bore | H7 hollow bore with keyway; 30–110 mm |
| Cooling Fins | Cast-integral; ~18°C lower sustained temp vs WPEKA; manages two-stage heat |
| Housing | FC25 cast iron; same footprint as WPEKA; increased HL for fins |
| Upgrade Path | Direct thermal upgrade from WPEKA — verify HL clearance, same bore/shaft dims |
| Input | Standard solid shaft with keyway; 5 direction positions (A–E) |
✅ Key Features & Benefits
Dual Heat Source Management for Two-Stage Hollow Shaft Drives
A two-stage hollow shaft gearbox generates heat from two gear mesh sources. The WPEKS fin array is designed to manage this dual heat load while maintaining the hollow bore dimensions — the fins do not affect bore geometry, and bore performance is verified after the thermal run test to confirm no thermal distortion. Keywords: hollow shaft finned double speed worm gearbox, thermal two-stage hollow bore reducer.
Coupling-Free + Thermal Stability = Minimal Maintenance
The WPEKS eliminates two major maintenance categories simultaneously: output coupling inspection/replacement (hollow bore) and overtemperature-related unplanned stops (fin cooling). For food processing and brewing facilities operating on tight production schedules, both maintenance reductions translate directly to improved OEE.
Food & Brewing Optimised
Unlike the WPEDS (motor-direct, finned), the WPEKS uses a standard solid input shaft — making it compatible with existing indirect-drive motor arrangements in food and brewing facilities that have standardised on belt or chain motor connections. The hollow output bore provides the coupling-free process shaft connection required for hygienic mixer designs.
Permanent Cast-Integral Fins for Industrial Environments
For food factories with steam cleaning, breweries with CO₂ environments, and chemical plants with corrosive atmospheres, the cast-integral fins provide permanent thermal performance without bolt-on accessories that can loosen, corrode, or harbour contamination. The fin surface can be cleaned with standard washing procedures.
Drop-In Upgrade from WPEKA
The WPEKS shares the identical base footprint and bore dimensions with the WPEKA. For any WPEKA installation experiencing overtemperature issues during long production shifts, the WPEKS is the minimum-disruption thermal upgrade — verify HL height clearance for the fin array and swap in place.
9 Size Groups, Full Heavy Process Coverage
Bore diameters from 30 mm (size 40-70) to 110 mm (size 155-250) and ratios 1/200–1/900 cover the complete range of heavy process mixer, agitator, and drum drive applications that require both thermal stability and coupling-free output connection.
Industry Applications
The WPEKS is the thermal solution for continuous heavy process drives requiring both coupling-free hollow bore output and two-stage ultra-high ratio reduction:
Brewing & FermentationLarge fermenter vessel agitator drives, conditioning tank drives, and wort cooling vessel mixers in brewing where long continuous production shifts and CO₂-rich environments demand thermally stable coupling-free hollow shaft drives.
Dairy & Food ProcessingLarge cheese vat agitator drives, butter churning vessel drives, and industrial yoghurt mixing vessel drives requiring ultra-slow impeller speeds with hollow bore direct mounting and thermal stability during extended production runs.
Condiment & Sauce ProductionLarge sauce mixing vessel drives, industrial ketchup batch cooker agitators, and food ingredient blending vessel drives requiring reliable ultra-slow hollow shaft coupling-free drives in food-contact environments.
Specialty Chemical — Continuous LinesContinuous polymer mixing vessel drives, specialty adhesive agitation drives, and industrial coating material mixing vessels operating at near-100% duty cycle in warm plant rooms where two-stage heat generation requires fin management.
Natural & Organic Food ProductionOrganic jam kettle agitator drives, natural cosmetics mixing vessel drives, and essential oil blending vessel systems where gentle ultra-slow mixing requires compact hollow shaft two-stage drives with extended thermal stability.
Industrial-Scale Batch ProductionAny large industrial batch mixing vessel operating long production cycles where the dual benefits of hollow shaft direct mounting and fin cooling reduce both mechanical maintenance and thermal-related production interruptions.
Quality Control & Certification
ISO 9001:2015 & CE
Full ISO 9001:2015 QMS. CE Declaration of Conformity per shipment. Food-grade lubricant compatibility confirmed for USDA/FDA machine documentation on request. Fin casting quality verified at foundry stage before machining.
️ Thermal Run + Post-Run Bore Check
Each WPEKS undergoes a 60-minute thermal stability run at 110% rated torque. After the thermal run, the hollow bore is re-measured by calibrated plug gauge to confirm no thermal distortion has affected the H7 bore tolerance. This post-run bore check is unique to the WPEKS and confirms both thermal and bore performance in one test sequence.
Material & Fin Standards
Housing: FC25 cast iron (≥250 MPa). Both worm shafts: 20CrMnTi (≥58 HRC). Wheel rims: ZCuSn10Pb1. Fin geometry verified at casting stage. Third-party inspection available for food, brewing, and pharmaceutical compliance documentation.
Why Choose Ever-power for WPEKS Gearboxes
We supply WPEKS hollow shaft finned two-stage gearboxes to food processing OEMs, brewery equipment builders, and dairy vessel manufacturers in the USA, Saudi Arabia, the Netherlands, Australia, and over 60 countries worldwide. Our post-run bore check — re-measuring H7 tolerance after the thermal run test — is a quality assurance level that food and brewing industry customers value as evidence that their bore dimensions remain correct even after thermal loading.
- ✅ Post-thermal-run bore verification — H7 re-checked after 60-min thermal test
- ✅ Food-grade lubricant factory-fill available on request
- ✅ Foundry-stage fin geometry inspection before machining
- ✅ Custom bore sizes for non-standard food/brewing process shaft diameters
- ✅ 20+ years export record — USA, Saudi Arabia, Netherlands, Australia and beyond
⭐ Customer Reviews
“We use WPEKS units on our large fermenter vessel agitator drives. The hollow bore mounts directly on our agitator shaft, and the cooling fins maintain stable oil temperature through our 20-hour fermentation batches in a warm climate brewery. Since switching from WPEKA to WPEKS, we have had no thermal-related stops on our fermentation line. Excellent product.”
Emma T., Process Engineer
Brewery Equipment OEM, South Australia, Australia
“We operate WPEKS gearboxes on our large sauce batch cooker agitators. The 1/600 ratio provides the ultra-slow impeller speed our heating process requires, and the hollow bore eliminates the coupling that our food safety team found difficult to clean. The thermal fins keep the units stable through our extended 12-hour batch cycles. Zero issues in 18 months.”
Nathan W., Plant Engineer
Food Processing Facility, Wisconsin, USA
“WPEKS gearboxes for our large date paste and condiment mixing vessel drives. In Saudi Arabia’s climate with production rooms regularly reaching 40°C+, the cooling fins on the two-stage housing are essential for continuous operation. The hollow bore direct shaft mounting simplifies our maintenance procedures. Excellent quality from Ever-power.”
Abdullah M., Technical Manager
Food Manufacturing, Riyadh, Saudi Arabia
“We use WPEKS on our large cheese vat agitator drives. The hollow bore mounting on the paddle shaft eliminates coupling maintenance in a wash-down environment, and the fins handle the thermal load of continuous two-stage operation during long cheese-making batches. Good quality, reliable delivery to Netherlands. Would recommend.”
Henk V., Equipment Engineer
Dairy Equipment Manufacturer, Rotterdam, Netherlands
❓ Frequently Asked Questions
What is the difference between WPEKS and WPEKA?
The WPEKA has two-stage hollow bore output in a smooth-body housing. The WPEKS adds integral cooling fins that reduce sustained oil temperature by ~18°C. All bore dimensions, input shaft dimensions, and base footprint are identical. Choose WPEKA for standard duty; choose WPEKS for continuous heavy process duty in warm environments where two-stage heat generation approaches the smooth-body thermal limit.
How much cooler does the WPEKS run compared to the WPEKA?
At rated load and 40°C ambient, the WPEKS maintains oil sump temperature approximately 15–18°C lower than an equivalent WPEKA. For a brewing or food factory with 35°C ambient and a two-stage gearbox running near its rated torque for 12+ hours, the WPEKS may be the difference between stable operation and an overtemperature trip that ruins the batch.
Is the WPEKS suitable for food-contact and wash-down environments?
The standard WPEKS with grey cast iron housing and NBR seals is not rated for direct food-contact or high-pressure wash-down. However, the coupling-free hollow bore eliminates the difficult-to-clean coupling guard. For hygiene compliance, specify food-grade lubricant (NSF H1) and request the optional epoxy coating. Contact us about stainless steel shaft extension options for food-contact shaft ends.
Can I replace an WPEKA with a WPEKS without machine modification?
Yes in most cases — WPEKS shares the identical base footprint, bore dimensions, and input shaft dimensions with WPEKA. The only change is the increased housing height (HL) due to the fin array. Verify available vertical clearance above your existing WPEKA installation before ordering. The bore is the same size, so no shaft modification is required.
What is the recommended lubricant for WPEKS in brewing and food environments?
For ambient temperatures 15–40°C, standard ISO VG 320 mineral gear oil is suitable. For food or brewing applications requiring NSF H1 food-grade certification for incidental food contact, we can factory-fill with an NSF H1 registered PAO or PG synthetic gear oil on request. Food-grade synthetic oils also offer better thermal stability, which further extends the thermal margin of the WPEKS in continuous production environments.
Thermal Stability + Coupling-Free + Ultra-High Ratio — Get WPEKS Quote
For continuous food, brewing, and chemical process drives requiring thermal stability AND coupling-free hollow shaft output at 1/200–1/900 ratios, the WPEKS delivers all three in one unit. Request a bore confirmation and free thermal assessment today.
