Description
WPKS K+S Cast Iron Worm Reducer — Product Overview
The WPKS solves a specific installation problem: applications where the motor must be positioned overhead (S-type top-entry) and the driven equipment has a keyed shaft requiring direct insertion without a coupling (K-type hollow bore). Neither the WPKA nor the WPS alone covers this combination — the WPKS provides both in a single FC20+ cast iron housing.
Typical applications include overhead-driven screw conveyors, grain augers, and turntable drives where vertical motor positioning conserves horizontal space while the hollow bore eliminates the coupling that would otherwise be exposed to crop debris, process fluids, or outdoor conditions.
WPKS Worm Reducer Specifications
| Parameter | Specification |
|---|---|
| Series | Single Speed |
| Housing Structure | Solid integral cast iron |
| Input Configuration | Solid shaft — above (S-type) |
| Output Configuration | Hollow bore — K-type through-hole |
| Reduction Ratio | 1/5–1/60 |
| Centre Distance | 40–250 mm |
| Mounting | Foot-mount or shaft-mount with torque arm |
| Housing Material | FC20+ grey cast iron (GG20) |
| Worm Wheel Material | Tin-bronze ZCuSn10Pb1 |
| Worm Shaft Material | 20CrMnTi, 55–60 HRC surface |
| Lubrication | N220–N320 (−30°C–40°C); N320–N460 (40°C–65°C) |
| Max Oil Temperature | 95°C continuous |
| Weight Range | 4–365 kg |
| Special Feature | K+S combination: top-entry solid input shaft and hollow-bore output |
Size & Dimension Data
| Size | Ratio | Input Power (kW) | Output Torque (Nm) | A (mm) | AB (mm) | B (mm) | BB (mm) | Weight (kg) |
|---|---|---|---|---|---|---|---|---|
| 40 | 1/5–1/60 | — | — | 143 | 87 | 85 | 40 | 4 |
| 50 | 1/5–1/60 | — | — | 175 | 108 | 105 | 50 | 7 |
| 60 | 1/5–1/60 | — | — | 198 | 120 | 110 | 60 | 10.5 |
| 70 | 1/5–1/60 | — | — | 231 | 140 | 130 | 70 | 14.5 |
| 80 | 1/5–1/60 | — | — | 261 | 160 | 150 | 80 | 22 |
| 100 | 1/5–1/60 | — | — | 322 | 190 | 160 | 100 | 36 |
| 120 | 1/5–1/60 | — | — | 371 | 219 | 175 | 120 | 63 |
| 135 | 1/5–1/60 | — | — | 422 | 249 | 210 | 135 | 80 |
| 155 | 1/5–1/60 | — | — | 497 | 295 | 256 | 155 | 114 |
| 175 | 1/5–1/60 | — | — | 534 | 314 | 282 | 175 | 150 |
| 200 | 1/5–1/60 | — | — | 580 | 342 | 320 | 200 | 218 |
| 250 | 1/5–1/60 | — | — | 705 | 420 | 400 | 250 | 365 |
WPKS Worm Reducer — Core Features
■ S-Type + K-Type — Unique Shaft Routing
Top-entry solid input shaft and hollow bore output together create a drive configuration unavailable in any other single WP series unit. Motor overhead, driven shaft through the bore — both constraints satisfied.
■ Hollow Bore Diameters 18.8–90 mm
Identical bore dimensions to WPKA at every size — the same driven shaft that fits a WPKA also fits the WPKS. All keyway dimensions follow GB/T 1095.
■ Foot-Mount + Shaft-Mount in One Housing
The WPKS base plate and torque arm boss both exist in the same housing. Use foot-mount for traditional installation or shaft-mount with torque arm for direct shaft installation — no modification required.
■ Overhead Motor Reduces Horizontal Footprint
S-type top-entry positions the motor directly above the reducer, eliminating lateral motor projection. Combined with hollow bore output, WPKS achieves the most compact overhead drive-to-shaft installation in the WP series.
■ FC20+ Cast Iron — Outdoor Agricultural Duty
Grey cast iron resists the corrosion from fertiliser dust, grain chaff, and outdoor moisture that degrades aluminium housings. The WPKS is designed for outdoor agricultural and field conditions.
■ Oil Circuit for S-Type Orientation
The oil volume and internal channel geometry are calibrated for S-type mounting, ensuring the worm gear mesh receives adequate lubrication splash with the input shaft entering from above.
WPKS Worm Reducer — Industry Applications
☷ Grain Auger & Screw Conveyor
Overhead motor above the auger head shaft keeps the motor clear of crop debris and moisture at the loading point. The hollow bore eliminates the coupling that would otherwise be exposed to the outdoor environment.
⚒ Turntable & Indexing Drives
Central shaft passes through the WPKS hollow bore enabling compact rotary drive tables where the vertical motor position minimises total machine height.
⚊ Overhead-Driven Conveyor Systems
In overhead conveyor systems where the drive unit must be above the conveyor belt, WPKS positions the motor directly overhead while the hollow bore eliminates the coupling below the drive unit.
⚙ Agricultural Irrigation Drives
Overhead motor keeps electrical components elevated above field-level soil, moisture, and crop debris while the hollow bore provides direct coupling to the irrigation pump shaft.
Ever Power Manufacturing Quality — WPKS Worm Reducer
■ ISO 9001:2000 Certified
Every unit is manufactured under ISO 9001:2000 quality management. Raw material inspection, in-process checks, and final testing are all documented and traceable to each unit’s serial number.
■ CE Marking — EU Machinery Directive 2006/42/EC
Full CE compliance confirms adherence to European safety and design standards for mechanical power transmission, supporting export to EU, UK, Australian, and New Zealand markets.
■ Pre-Shipment Testing: Noise, Leak, Torque
Every unit passes three tests before shipping: noise below 68 dB(A) at rated load, 30-minute pressurisation leak test, and torque transmission within ±5% of rated value. Non-conforming units are reworked — not shipped.
■ FC20+ Material Certification
Housing castings are verified by mill certificates for FC20 grade: minimum 220 MPa tensile strength, 160–200 HB hardness. Ultrasonic defect testing is performed on size 135 and above.
WPKS Worm Reducer — Customer Reviews
“WPKS on our screw conveyor head drives where the motor must be above the equipment. K-bore on the conveyor shaft and overhead motor — exactly the configuration we needed. Zero coupling hardware.”
“Used WPKS-100 on our grain auger with overhead motor drive. Hollow bore eliminated the shaft coupling that kept failing due to seasonal crop debris ingress. No failures in two full harvest seasons.”
“WPKS on our turntable drive. Vertical motor plus hollow bore output — very compact installation. Motor overhead keeps the work area open below. Excellent.”
“Good K+S combination unit. Compact overhead drive with direct shaft connection. Would appreciate the option of a flared bore entrance to ease shaft insertion on size 135 and above.”
Frequently Asked Questions — WPKS Worm Reducer
Get Your WPKS Quote Today
Tell Ever Power your application requirements — torque, ratio, mounting, and shaft dimensions. Engineering response within 24 hours. OEM custom specifications, bulk pricing, and global shipping available.
