Beschreibung
WPWEK Double Speed Cast Iron Worm Gearbox
Universal platform double-stage drives with shaft-mount hollow bore output — covering multiple installation orientations at extreme reduction ratios without an external coupling — represent the highest-flexibility specification in the double-stage drive category. The WPWEK Double Speed Cast Iron Worm Gearbox combines the WPW-series universal body (5 shaft direction configurations), K-type hollow bore output, and double-stage worm reduction in a single cast iron housing. Machine designers building equipment for diverse installation geometries with shaft-mount output requirements at extreme ratios specify the WPWEK as their universal hollow bore double-stage platform.
Technical Specifications — WPWEK
Key Parameters
| Parameter | Specification |
|---|---|
| Series | Double Speed WPWE+K |
| Housing | Solid integral cast iron, dual-stage, WPW universal body |
| Input | Solid shaft (bilateral) |
| Output | Hollow bore (K-type) |
| Ratio | 1/200–1/900 |
| Size Range | 40–250 combined mm |
| Mounting | Foot-mount, K hollow output, universal body |
| Housing Material | FC20+ grey cast iron, dual-chamber |
| Worm Wheels | Matched pair tin-bronze ZCuSn10Pb1, both stages |
| Worm Shafts | 20CrMnTi case-hardened, 55–60 HRC, both stages |
| Lubrication | N220–N320 (–30°C–40°C); N320–N460 (40°C–65°C), both chambers |
| Max Oil Temp | 95°C continuous |
| Weight Range | 17–442 kg |
| Key Feature | Universal W-body + K hollow bore + double-stage — universal shaft-mount extreme ratio platform |
Size & Performance Data
| Size Combo | Ratio | Input (kW) | Output Torque (Nm) | A (mm) | AA (mm) | AB (mm) | BB (mm) | Weight (kg) |
|---|---|---|---|---|---|---|---|---|
| 40–70 | 1/200 | 0.48 | 250 | 286 | 195 | 153 | 131 | 20 |
| 50–80 | 1/300 | 0.65 | 350 | 297 | 197 | 144 | 142 | 27 |
| 60–100 | 1/400 | 0.95 | 500 | 363 | 231 | 175 | 169 | 44 |
| 70–120 | 1/500 | 1.64 | 840 | 408 | 256 | 193 | 190 | 73 |
| 80–135 | 1/600 | 2.5 | 1400 | 471 | 298 | 226 | 210 | 101 |
| 100–155 | 1/800 | 3.69 | 2100 | 555 | 354 | 269 | 252 | 144 |
| 120–175 | 1/900 | 5.09 | 3050 | 568 | 379 | 287 | 255 | 201 |
| 135–200 | … | 7.22 | 3950 | 662 | 425 | 318 | 319 | 293 |
| 155–250 | … | 11.71 | 6050 | 795 | 510 | 380 | 385 | 462 |
Double-Stage Product Structure
The WPE double-stage housing contains two complete worm gear stages in one precision-machined cast iron body, with two independent oil chambers:
First worm shaft and bronze wheel — receives motor power, produces first reduction. Higher-speed, lower-torque stage optimised for input speed operating conditions.
Connects primary stage output to secondary stage input. Precision-machined, supported by C3-clearance bearings, transmits intermediate torque and speed between the two stages.
Second worm shaft and bronze wheel — lower speed, higher torque. Matched-pair manufacturing with primary stage ensures consistent inter-stage noise and efficiency throughout service life.
Two oil chambers — one per stage — each filled and monitored separately. Independent optimisation of lubrication viscosity and fill level per stage is a key advantage over two-gearbox cascade arrangements.
Two air vents and two oil gauges — one per chamber — provide independent pressure management and oil level monitoring for each stage throughout operation.
Single FC20+ cast iron casting forms both chambers with no gaskets between them. Monolithic rigidity prevents inter-chamber flex that could misalign intermediate shaft bearings.
Core Features & Benefits
■ Universal W-Body + K Hollow Bore + Double-Stage: Universal Shaft-Mount Extreme-Ratio Drive
The WPWEK is the hollow bore version of the WPWE — all universal body features maintained with K-type hollow bore output added. Three features in one casting: universal orientation, coupling-free shaft connection, extreme reduction.
■ K-Bore Rated for Full Double-Stage Torque in All 5 Orientations
The WPWEK hollow bore output is rated for full double-stage output torque across all 5 shaft direction configurations. Universal orientation does not compromise hollow bore torque capacity.
■ Hollow Bore Diameter Range Consistent with WP Hollow Bore Standard
WPWEK hollow bore diameters match the WPEKA/WPEKS bore specifications for each size combination — providing dimensional consistency across the WP hollow bore range.
■ Torque Arm Boss in Universal Body for Shaft-Mount
The WPW-series universal body includes a torque arm mounting boss compatible with all 5 shaft direction configurations, providing shaft-mount housing restraint regardless of installation orientation.
■ H7 Hollow Bore Tolerance — Standard Across Full Size Range
The WPWEK hollow bore maintains H7 tolerance specification across all sizes and shaft direction configurations, ensuring consistent shaft fit quality from the universal production platform.
■ 5 Shaft Direction Configurations — Full Universal Support
All 5 shaft direction configurations (A–E) are available for the WPWEK, maintaining the full universal orientation support of the WPW-series platform across the hollow bore double-stage variant.
Industry Applications — WPWEK
⚊ Universal Shaft-Mount Conveyor Drives — Multiple Orientations
