توضیحات
WPKZ Cast Iron Worm Gearbox — Product Overview
When a flange-mounted drive with top-entry input must also deliver power through a hollow bore output — scenarios common in column agitators where a solid shaft passes through the gearbox, or in ceiling-mount applications where the driven shaft needs to insert into the gearbox rather than couple to it — the WPKZ Single Speed Cast Iron Worm Gearbox provides the precise solution. Combining the Z-type flange housing with K-type hollow bore output and T-type (top-entry) input, the WPKZ is the definitive choice for flange-mount shaft-mounted drives where the driven shaft passes through the gearbox output.
Technical Specifications — WPKZ
Key Parameters
| Parameter | Specification |
|---|---|
| Series | Single Speed |
| Housing Structure | Solid integral cast iron |
| Input Configuration | Solid shaft (vertical upward, T-type) |
| Output Configuration | Hollow bore output (K-type) |
| Reduction Ratio | 1/5–1/60 |
| Centre Distance Size | 50–135 mm |
| Mounting | Flange-mount (Z-type), input from top, hollow output |
| Housing Material | FC20+ grey cast iron (GG20) |
| Worm Wheel Material | Tin-bronze alloy (ZCuSn10Pb1) |
| Worm Shaft Material | 20CrMnTi case-hardened steel, 55–60 HRC surface |
| Lubrication | N220–N320 mineral oil (−30°C to 40°C); N320–N460 (40°C to 65°C) |
| Max Oil Temperature | 95°C continuous |
| Weight Range | 7–80 kg |
| Special Feature | K+Z: flange-mount with top-entry input AND hollow-bore output — maximum installation versatility |
Size & Performance Data
| Size | Ratio | Input Power (kW) | Output Torque (Nm) | AB (mm) | LL (mm) | B (mm) | CC (mm) | Weight (kg) |
|---|---|---|---|---|---|---|---|---|
| 50 | 1/5–1/50 | — | — | 108 | 77 | 150 | 50 | 7 |
| 60 | 1/10–1/50 | — | — | 120 | 82 | 168 | 60 | 10 |
| 70 | 1/15–1/50 | — | — | 140 | 95 | 194 | 70 | 15 |
| 80 | 1/20–1/50 | — | — | 160 | 100 | 214 | 80 | 20 |
| 100 | 1/25–1/50 | — | — | 190 | 135 | 254 | 100 | 35 |
| 120 | 1/30–1/50 | — | — | 219 | 160 | 282 | 120 | 60 |
| 135 | 1/40–1/60 | — | — | 249 | 170 | 317 | 135 | 80 |
Product Structure
The WP series cast iron worm gearbox is built from precision-manufactured components, each selected for maximum performance and longevity:
FC20+ grey cast iron, precision-machined mounting faces, integrated air vent, oil gauge boss, and drain plug.
20CrMnTi case-hardened steel, precision-ground thread profile, 55–60 HRC surface hardness. Supported by twin tapered roller bearings.
Tin-bronze alloy ZCuSn10Pb1, precision hobbed tooth profile, press-fitted to cast iron hub. Provides superior anti-galling properties in the worm mesh.
45# alloy steel, heat treated to 250–280 HB, precision-machined keyway, supported by deep groove ball bearings or tapered rollers (size-dependent).
National oil seal lips on all shaft exits. O-ring seal on housing joints. Eliminates contamination ingress and prevents lubricant loss.
All bearings are premium-grade (C3 clearance class), selected for the specific radial and axial load profile of each shaft position and operating configuration.
Core Features & Benefits
■ K+Z Combination: Hollow Bore Output + Z-Type Flange Housing
The WPKZ unifies two specialised requirements: the K-type hollow bore output (direct shaft insertion, no coupling) and the Z-type flange housing (direct vessel/structure mounting, no foot-mount bracket). This is a premium engineering combination.
■ Hollow Bore Precision: H7 Tolerance, Hardened Bore Surface
The WPKZ hollow output bore is machined to H7 tolerance for precise shaft fit, with surface hardening to prevent bore wear under sustained torque cycling. Standard keyway slot is machined per GB/T 1095.
■ Z-Flange Mounting — Direct Vessel/Structure Interface
The Z-type housing flange face is precision-machined for flatness and perpendicularity, ensuring the gearbox mounts square to the vessel nozzle or structural flange without shimming.
■ T-Type Input Shaft — Compact Top-Entry Profile
T-type input (from directly above) minimises the height profile above the mounting flange, keeping the entire drive as compact as possible in ceiling-height-limited installations.
■ Torque Arm Boss on Housing for Shaft-Mount Applications
When the WPKZ is operated as a shaft-mounted unit (hollow bore onto driven shaft while the housing is also flange-mounted), a torque arm is not required — the Z-flange mounting provides the housing restraint.
■ FC20+ Housing Standard — Full WP Series Mechanical Specification
The WPKZ maintains the FC20+ cast iron mechanical standard across all sizes, providing identical vibration damping, impact resistance, and thermal performance to the full WP range.
Industry Applications — WPKZ
⚒ Column Agitator Through-Shaft Drives
Agitator columns where the mixing shaft passes through the gearbox output bore (rather than coupling to it) benefit from the WPKZ K-type hollow bore, eliminating the coupling on the most difficult-to-access part of the drive train.
⚔ Ceiling-Mount Shaft-Mount Drives
Ceiling-mounted drives where the driven shaft inserts into the gearbox hollow bore from below use the WPKZ: the Z-flange attaches to the ceiling structure, the shaft passes up into the K-bore.
☵ Vessel Nozzle Shaft-Mount Agitators
Vessel agitators where the agitator shaft is fixed (passes through the hollow bore) and the gearbox must bolt to the vessel nozzle use the WPKZ as the most elegant single-unit solution for this configuration.
⚊ Compact Industrial Shelf Drives
Compact drives mounted on structural shelves or brackets where the driven shaft inserts upward into the hollow bore output while the gearbox flange-mounts to the shelf use the WPKZ.
⚛ Precision Laboratory Stirrer Drives
Laboratory-scale stirrer and mixer equipment with precise flange-mount requirements and hollow shaft connections use the WPKZ for its compact size range (50–135 mm) and precision hollow bore dimensions.
Why Choose WPKZ — Competitive Comparison
| Feature | Ever-power WPKZ | Alternative Options |
|---|---|---|
| Housing Mount | ✓ Z-type flange — direct vessel/wall mount | Foot mount — flat surface needed |
| Output Connection | ✓ K hollow bore — shaft inserts in | Solid shaft + coupling required |
| Coupling Hardware | ✓ Zero — both ends shaft-direct | Coupling on output side at minimum |
| Installation On Vessels | ✓ Z-flange to nozzle + K shaft through | Bracket + coupling required |
| Drive Profile | ✓ Most compact flange-mount shaft-mount drive | Standard size + coupling length |
| Application | ✓ Flange-mount + shaft-through drive architecture | Standard foot-mount horizontal drive |
Quality Control & Certifications
✎ ISO 9001:2000 Certified
We hold ISO 9001:2000 International Quality System Certification — the first in our industry category to achieve this standard. Every WPKZ is manufactured, assembled, and tested under this quality framework.
✎ CE Marking
Full CE marking confirms compliance with EU Machinery Directive 2006/42/EC requirements — covering safety, design standards, and manufacturing quality for mechanical power transmission equipment.
✎ Pre-Shipment Testing
Every unit undergoes: Noise test (below 68 dB(A) at rated load), Oil leak test (30-minute pressurisation), and Torque transmission test (output torque within ±5% of rated). Failed units are reworked — not shipped.
✎ FC20+ Material Certification
Housing castings are verified by material test certificates for FC20 grade (220 MPa minimum tensile strength). Hardness testing (160–200 HB) and ultrasonic testing for internal defects are performed on size 135 and above.
Why Choose Ever-power for Your WPKZ Worm Gearbox
We have been manufacturing cast iron worm gearboxes for over two decades, with an installed base of more than 10,000 units across 11 product series. Our accumulated process knowledge is embedded in every WPKZ we produce.
We operate CNC grinding centres, gear hobbing machines, and coordinate measuring machines sourced from the USA, Japan, Germany, and Italy — the same equipment used by tier-1 European gearbox manufacturers.
We export to the USA, Europe, Southeast Asia, Australia, and the Middle East. Our export documentation, packing standards, and lead times are optimised for international supply chains.
We offer full OEM services including custom nameplating, paint colours, shaft dimensions, and flange configurations. Our engineering team supports custom specifications from concept to production release.
Our gearboxes serve metallurgy, stone processing, woodworking, tobacco, food, leather, textile, glass, medical, chemical, light industry, and rubber/plastics sectors globally.
Our application engineers provide gearbox selection, torque calculation, and installation guidance. Email us at [email protected] with your application data for a same-day selection recommendation.
Customer Reviews & Case Studies
“WPKZ-100 on our column agitators. The hollow bore goes directly onto the agitator shaft — no coupling exposed in the process environment — and the Z-flange bolts to the column top plate. The most elegant drive installation we’ve achieved and the most reliable. Zero failures in 3 years.”
Australia 🇦🇺
“Our research mixing vessels use WPKZ exclusively. The combination of hollow bore (shaft inside the gearbox) and flange mount is the correct engineering solution for laboratory-scale agitators — no external shaft protrusions, no coupling alignment, simply clean precision engineering.”
Italy 🇮🇹
“WPKZ drives our fermentation vessel agitators. The K hollow bore on the agitator shaft and Z flange on the vessel nozzle gives us the cleanest possible drive installation for our SIP (sterilise-in-place) processes. Minimal external surfaces, minimal contamination risk. Excellent product.”
China 🇨🇳
“WPKZ on our pilot plant vessels. The hollow bore + flange mount combination was available immediately from catalogue — we didn’t need to wait for a custom unit. Quality is consistent and the flange dimensions matched our standard vessel nozzle pattern with a single transition ring.”
Sweden 🇸🇪
Frequently Asked Questions — WPKZ
Get Your WPKZ Quote Today
Whether you need one unit for a retrofit or a thousand for an OEM production run, Ever-power has the manufacturing capacity, quality certifications, and technical expertise to deliver.
Contact our engineering team with your application requirements — we respond within 24 hours.
✓ OEM & Distributor partnerships welcome ✓ Custom specifications available ✓ Global shipping
