Description
WPWKO Universal Speed Cast Iron Worm Gearbox
Top-entry agitators with hollow shaft design — where the agitator shaft passes through the gearbox hollow bore in the vertical direction — in equipment built on a universal housing platform represent a precise engineering specification. The WPWKO Universal Speed Cast Iron Worm Gearbox combines the WPW-series universal body (5 shaft direction configurations), K-type hollow bore output in the vertical (O-type upward) direction, and ratios 1/5–1/60 in a single cast iron housing. The standard product for hollow shaft top-entry agitator drives across diverse installation orientations.
Technical Specifications — WPWKO
Key Parameters
| Parameter | Specification |
|---|---|
| Series | Universal Speed (WPW+K+O) |
| Housing | Solid integral cast iron (P-housing) |
| Input | Solid shaft (bilateral) |
| Output | Hollow bore (K-type), vertical upward |
| Ratio | 1/5–1/60 |
| Size Range | 40–250 mm |
| Mounting | Foot-mount, K hollow vertical output |
| Housing Material | FC20+ grey cast iron (GG20) |
| Worm Wheel | Tin-bronze alloy ZCuSn10Pb1 |
| Worm Shaft | 20CrMnTi carburised & hardened, 55–60 HRC |
| Lubrication | N150–N220 (–30°C–40°C); N220–N320 (40°C–65°C) |
| Max Oil Temp | 95°C continuous |
| Weight Range | 6.5–430 kg |
| Key Feature | WPWKO: universal body + K hollow bore vertical output — hollow shaft top-entry agitator drives in universal W-housing |
Size & Performance Data
| Size (mm) | Ratio | Input Power (kW) | Output Torque (Nm) | A (mm) | AA (mm) | AB (mm) | BB (mm) | Weight (kg) |
|---|---|---|---|---|---|---|---|---|
| 40 | 1/5–1/60 | 0.06–0.78 | 2.2–26.5 | 121 | 53 | 40 | 49 | 6.5 |
| 50 | 1/5–1/60 | 0.10–1.33 | 4.5–54.0 | 133 | 57 | 44 | 55 | 9 |
| 63 | 1/5–1/60 | 0.19–2.25 | 8.5–104 | 155 | 67 | 51 | 65 | 14 |
| 75 | 1/5–1/60 | 0.32–3.75 | 14.5–175 | 175 | 75 | 57 | 73 | 20 |
| 90 | 1/5–1/60 | 0.62–6.98 | 28–316 | 205 | 89 | 67 | 87 | 33 |
| 110 | 1/5–1/60 | 1.18–11.9 | 53–540 | 238 | 103 | 78 | 101 | 54 |
| 130 | 1/5–1/60 | 2.02–19.7 | 91–891 | 266 | 115 | 87 | 112 | 78 |
| 150 | 1/5–1/60 | 3.07–28.8 | 139–1304 | 302 | 131 | 100 | 128 | 113 |
| 175 | 1/5–1/60 | 5.13–45.9 | 232–2074 | 348 | 151 | 115 | 147 | 170 |
| 200 | 1/5–1/60 | 8.02–66.2 | 363–2993 | 392 | 170 | 130 | 165 | 238 |
| 250 | 1/5–1/60 | 14.0–106 | 633–4796 | 479 | 208 | 159 | 202 | 430 |
Universal W-Body Structure
The WPW-series universal housing is manufactured as a single FC20+ grey cast iron casting with bore positions, keyway orientations, and oil channels configured for the selected shaft direction. All 5 shaft direction configurations (A/B/C/D/E) use the same casting geometry with specific machining per configuration.
Hardened 20CrMnTi steel worm shaft with case-hardened tooth flanks (55–60 HRC). The worm shaft and its bearings are selected for the specific input orientation of the model — A-type (below), S-type (overhead), or bilateral — ensuring rated bearing life in the correct load direction.
Tin-bronze ZCuSn10Pb1 alloy worm wheel machined to mesh precisely with the hardened worm shaft. The bronze material provides excellent anti-seizure properties and wear-in characteristics for the worm gear mesh.
Output shaft in quenched-and-tempered steel with double-lip oil seals rated for the specific output orientation (horizontal, vertical upward O-type, vertical downward X-type, side T-type, or extended V-type). Seal selection matches the hydrostatic pressure requirements of the installed orientation.
Single-stage oil bath lubrication. Oil fill port, oil gauge, vent plug, and drain plug are positioned for the selected shaft direction configuration. Fill quantities are specified per configuration in the installation guide — do not use generic fill values across configurations.
FC20+ cast iron foot-mount base integrated with the housing casting. Four mounting holes for B3 foot mounting. The base orientation is fixed for the selected shaft direction configuration. For shaft-mount (hollow bore) applications, the torque arm boss provides housing restraint.
Core Features & Benefits
■ Universal W-Body + K Hollow Bore (Vertical O-Type): Hollow Shaft Vertical Drive in Any Orientation
The WPWKO combines K-type hollow bore output in the O-type vertical upward direction with the WPW universal body. Hollow shaft top-entry agitation in any of 5 installation orientations from one standard product.
■ K Hollow Bore Oriented Vertically — Shaft Passes Through Upward
The hollow output bore is oriented vertically upward (O-type direction). The driven shaft inserts from below, passes through the bore, and is secured by keyway. Full hollow shaft agitator connection in vertical orientation.
■ O-Rated Vertical Bearings for Hollow Bore Configuration
Output shaft bearing arrangement is rated for the axial loads from the hanging driven shaft assembly below the hollow bore in the vertical upward orientation.
■ Full WP Torque Through Vertical Hollow Bore
WPWKO K hollow bore rated for full WP output torques — up to 4,796 Nm at size 250 — in the vertical orientation. No derating for the K+O combined geometry.
■ 5 Shaft Direction Configurations Available
All 5 shaft direction configurations (A–E) available for WPWKO with K hollow vertical output, providing diverse input shaft positions while maintaining the vertical output direction.
■ Hollow Bore Diameters: 14–65 mm
Full bore size range from 14 mm (size 40) to 65 mm (size 250) in vertical orientation.
Industry Applications — WPWKO
☵ Hollow Shaft Top-Entry Agitators — Universal Platform
Process vessels with hollow shaft top-entry agitators across multiple vessel orientations use the WPWKO for standardised hollow bore vertical output across all installation positions.
⚔ Chemical & Pharmaceutical Hollow Shaft Vessels
Chemical and pharmaceutical vessels with hollow agitator shaft connections and top-entry vertical drives across a diverse vessel fleet use the WPWKO for platform standardisation.
⚒ OEM Hollow Bore Vertical Universal Platform
OEM vessel equipment builders requiring hollow bore vertical output across multiple machine orientations specify the WPWKO as their universal hollow shaft agitator drive platform.
⚊ Universal Hollow Vertical Slow Drives
Any application requiring hollow bore vertical output combined with universal installation orientation support benefits from the WPWKO’s unique K+O+universal combination.
⚛ Bioprocess & Food — Hollow Shaft Agitators Universal
Bioreactors and food processing vessels with hollow shaft agitators in various installation orientations use the WPWKO for combined hollow bore vertical output across the universal platform.
Why Choose WPWKO — Competitive Comparison
| Feature | Ever-power WPWKO | Alternatives |
|---|---|---|
| Hollow Bore + Vertical Output | ✓ Combined in one unit — universal body | Separate components required |
| Universal Housing | ✓ 5-direction W-body | Orientation-specific per model |
| Agitator Connection | ✓ Shaft through hollow bore — no coupling | Coupling required |
| Input Flexibility | ✓ 5 input positions available | Fixed single input-output geometry |
| OEM Standardisation | ✓ One hollow bore vertical SKU for all orientations | Multiple orientation-specific SKUs |
| Output Torque | ✓ Full WP range in vertical hollow bore | Same — single orientation only |
Quality Control & Certifications
✎ ISO 9001:2000 Certified
Every WPWKO is manufactured, assembled, and tested under ISO 9001:2000 quality management. Our factory was among the first in this product category to achieve this certification.
✎ CE Marking
Full CE marking confirms compliance with EU Machinery Directive 2006/42/EC — covering safety, design standards, and manufacturing quality for all WPW-series universal configurations.
✎ Pre-Shipment Testing
Noise test (below 72 dB(A) at rated load), oil leak test (30-minute pressurisation), torque transmission test (output torque within ±5% of rated). Failed units are reworked — not shipped.
✎ Universal Configuration Quality
Each shaft direction configuration (A–E) is verified dimensionally for correct bore position, keyway orientation, and oil channel routing before leaving our production line.
Why Choose Ever-power for WPWKO
We have been manufacturing WPW-series universal cast iron worm gearboxes for over two decades. Our 5-shaft-direction production process — with orientation-specific quality checks — is a core competency of our manufacturing facility.
Our CNC machining centres maintain the bore position accuracy and keyway orientation tolerances required for consistent inter-part fit across all 5 shaft direction configurations of the WPW universal body.
We export the WPW series to Australia, Europe, Southeast Asia, the Middle East, and North America. Our export documentation, CE certification, and packing standards are optimised for international procurement.
Full OEM services: custom nameplating, paint colours, shaft dimensions, flange configurations, and documentation packages. Custom shaft direction combinations and output configurations available for OEM volumes.
Our application engineers provide WPW gearbox selection, load calculation, shaft direction selection, oil specification, and installation support. Email [email protected] with your application data.
The complete WPW universal series covers solid shaft, hollow bore, IEC flange, and extended shaft variants in all output directions — horizontal, vertical up, vertical down, side, and extended. One universal platform for all drive applications.
Customer Reviews & Case Studies
“WPWKO on our hollow shaft agitators across multiple vessel orientations. Hollow bore oriented vertically allows the agitator shaft to pass through the gearbox — our design requirement for hollow shaft aeration. Universal body covers all our vessel orientations. Excellent and unique product.”
Australia 🇦🇺
“WPWKO for our hollow shaft agitator drives in diverse reactor orientations. Vertical hollow bore output across multiple machine positions from one standard catalogue product. Previously achievable only with custom-engineered drives. Outstanding practical solution.”
Italy 🇮🇹
“WPWKO specified for our hollow shaft bioreactor drives across our vessel range. K hollow + O vertical + universal body in a standard product simplified our validation process significantly. Cast iron housing quality is excellent and consistent across orders.”
Germany 🇩🇪
“WPWKO on our hollow shaft fermentation vessel agitators in multiple vessel orientations. Hollow bore vertical output with universal mounting is the key product feature for our application. Very good quality for a highly specialised specification.”
Japan 🇯🇵
Frequently Asked Questions — WPWKO
Get Your WPWKO Quote Today
Whether you need one unit for a retrofit or hundreds for an OEM production run, Ever-power has the manufacturing capacity, ISO 9001 quality system, and WPW universal series expertise to deliver the WPWKO to your exact specification. Contact our engineering team — we respond within 24 hours.
✓ OEM & Distributor partnerships welcome ✓ Custom configurations available ✓ Global shipping
