EP-4 kg-340 kg WPW Universal Speed Reducer
The EP-WPW series is a versatile universal speed reducer designed for broad industrial applications. Available in sizes ranging from 40 to 250, it offers reduction ratios from 1/5 to 1/60. The unit features a robust cast iron housing with flexible shaft direction options (A-E) to accommodate various installation layouts. Weighing between 4 kg and 340 kg, it supports diverse load requirements. Key specifications include input shafts up to M24x42 and output shafts up to 25×9 mm. This reducer ensures reliable torque transmission and precise speed control, making it an ideal solution for machinery requiring durable, adaptable power transmission in compact spaces.
EP-WPW Series Universal Speed Reducer
EP-WPW Universal Speed Reducer
Heavy-duty worm gear speed reducer engineered for continuous industrial duty — available from 4 kg to 340 kg, reduction ratios 1/5 to 1/60, sizes 40–250.
EP-WPW Universal Speed Reducer Technical Specifications
Dimensional data (mm) for the standard WPW universal speed reducer range. All measurements conform to the engineering drawing supplied with each unit. Shaft sizes and mounting dimensions are consistent across the production range for drop-in replacement universal speed reducer installations.
| Size | Ratio | А | AB | B | BB | AC | BC | AD | BD | CC | HL | H | Z×L | HS | U | T×V (Input) | LS | S | W×Y (Output) | Weight (kg) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 40 | 1/5–1/60 | 143 | 87 | 114 | 74 | 95 | 61 | 78 | 42 | 40 | 35 | 125 | M6×12 | 25 | 12 | 4×2.5 | 28 | 14 | 5×3 | 4 |
| 50 | 1/5–1/60 | 175 | 108 | 150 | 97 | 111 | 68 | 85 | 50 | 50 | 35 | 150 | M6×18 | 30 | 12 | 4×2.5 | 40 | 17 | 5×3 | 6.5 |
| 60 | 1/5–1/60 | 198 | 120 | 168 | 112 | 127 | 76 | 105 | 55 | 60 | 42 | 177 | M8×20 | 40 | 15 | 5×3 | 50 | 22 | 7×4 | 9 |
| 70 | 1/5–1/60 | 231 | 140 | 194 | 131 | 152 | 86 | 125 | 65 | 70 | 55 | 215 | M10×25 | 40 | 18 | 5×3 | 60 | 28 | 7×4 | 13 |
| 80 | 1/5–1/60 | 261 | 160 | 214 | 142 | 169 | 102 | 140 | 70 | 80 | 65 | 250 | M12×28 | 50 | 22 | 7×4 | 65 | 32 | 10×4.5 | 21 |
| 100 | 1/5–1/60 | 322 | 190 | 254 | 169 | 216 | 117 | 180 | 90 | 100 | 80 | 310 | M12×30 | 50 | 25 | 7×4 | 75 | 38 | 10×4.5 | 34 |
| 120 | 1/5–1/60 | 371 | 219 | 282 | 190 | 256 | 144 | 220 | 100 | 120 | 95 | 370 | M14×32 | 65 | 30 | 7×4 | 85 | 45 | 12×4.5 | 51 |
| 135 | 1/5–1/60 | 422 | 249 | 317 | 210 | 296 | 147 | 260 | 110 | 135 | 105 | 425 | M16×35 | 75 | 35 | 10×4.5 | 95 | 55 | 16×6 | 78 |
| 155 | 1/5–1/60 | 497 | 295 | 382 | 252 | 345 | 185 | 280 | 120 | 155 | 103 | 461 | M16×35 | 85 | 40 | 12×5 | 110 | 60 | 18×7 | 102 |
| 175 | 1/5–1/60 | 534 | 314 | 372 | 255 | 374 | 192 | 320 | 140 | 175 | 123 | 521 | M16×35 | 85 | 45 | 14×5.5 | 110 | 65 | 18×7 | 142 |
| 200 | 1/5–1/60 | 580 | 342 | 456 | 319 | 412 | 230 | 360 | 150 | 200 | 130 | 575 | M20×36 | 95 | 50 | 14×5.5 | 125 | 70 | 20×7.5 | 202 |
| 250 | 1/5–1/60 | 705 | 420 | 552 | 385 | 500 | 285 | 420 | 190 | 250 | 150 | 700 | M24×42 | 110 | 60 | 18×7 | 155 | 90 | 25×9 | 340 |
All dimensions in millimetres (mm). Weight listed is approximate unit shipping weight. Tolerances per GB/T standard.
Five Core Advantages of the EP-WPW Universal Speed Reducer
Why engineers across food processing, packaging, construction, and material handling continue to specify the WPW series universal speed reducer for their most demanding drive applications.
① Wide Ratio Range — 1/5 to 1/60
The EP-WPW universal speed reducer ships in six standard reduction ratios (1/5, 1/10, 1/15, 1/20, 1/25, 1/30, 1/40, 1/50, 1/60), covering a far broader speed-control window than conventional NMRV worm reducers. Whether you are dialing down a 1450 RPM motor output to a slow conveyor crawl or simply matching a mid-range process speed, one product family handles the full spectrum — eliminating the cost and lead time of sourcing multiple gearbox types.
② Five Shaft-Direction Configurations (A–E)
Unlike single-configuration worm drive reducers that force awkward motor or machinery repositioning, the WPW series universal speed reducer offers five shaft-direction options (configurations A, B, C, D, and E). Input and output shafts can be oriented to match almost any spatial constraint in a machine frame, conveyor structure, or mixing system — significantly reducing the engineering re-work that typically accompanies a drive-train integration project.
③ Cast Iron Housing for Long-Term Durability
The housing is manufactured from high-grade cast iron — the same material standard used in heavy duty worm drive gearboxes for decades — delivering superior vibration damping, excellent heat dissipation, and resistance to shock loads that would crack lighter aluminum housings. The robust casting also contributes to precise bearing alignment retention over tens of thousands of operating hours, directly translating into lower maintenance frequency and predictable service intervals for plant engineers.
④ Phosphor Bronze Worm Wheel — High Torque, Low Wear
The mating worm wheel is cut from phosphor bronze alloy, chosen specifically for its excellent compatibility with the hardened alloy steel worm shaft. This pairing produces low friction coefficients, quiet meshing, and high torque worm gearbox output capacity relative to size. Over time, a phosphor bronze wheel self-burnishes against the worm, reducing running noise further — a characteristic that makes the WPW worm gear speed reducer especially popular in noise-sensitive food processing and pharmaceutical environments.
⑤ ISO 9001:2015 Production & Dimensional Interchangeability
Every WPW universal speed worm reducer is manufactured under ISO 9001:2015 quality management, with critical dimensions conforming to standard worm reducer gearbox mounting footprints. This makes the EP-WPW universal speed reducer a direct replacement universal speed reducer for many common drive configurations — reducing downtime when replacing aging equipment.
What Is the EP-WPW Universal Speed Reducer?
The EP-WPW universal speed reducer is a flanged, foot-mounted universal speed worm reducer designed to accept a direct motor input and deliver a smooth, high-torque, low-speed output through a precision-cut worm gear pair. Available across fourteen frame sizes from 40 to 250, it handles unit weights from 4 kg to 340 kg and is adapted to drive applications where both torque multiplication and reliable self-locking behavior are required simultaneously. The design follows well-established worm gearbox engineering conventions while improving on them in key areas — higher-quality bearing selection, refined oil sealing, and tighter gear-mesh tolerances.
Within the broader universal speed reducer category, the WPW series sits alongside the WP, WD, and WS families but distinguishes itself by offering multiple shaft-direction configurations within a single catalog range. This versatility makes it particularly valuable for OEM machine builders who serve multiple industries, as a single stocked product can serve different installations without modification.
How Does a Worm Gear Reducer Work?
A worm gear speed reducer operates on a deceptively simple principle: a helically threaded worm shaft meshes at 90° with a worm wheel (gear). As the worm rotates — driven by an electric motor — its threads push the wheel teeth forward in a controlled sliding action. Because the worm must complete one full revolution to advance the wheel by only one tooth pitch, even a single-start worm produces a significant speed reduction in a compact envelope. The gear worm reducer principle is therefore ideal when a large reduction ratio is needed without stacking multiple gear stages.
In the EP-WPW universal speed reducer, the alloy steel worm is case-hardened and ground, while the phosphor bronze wheel is hobbed to mesh with it precisely. This material pairing keeps the coefficient of friction low enough to deliver acceptable thermal efficiency even at higher reduction ratios. The sliding contact between worm and wheel also provides inherent self-locking — when the worm stops rotating, reverse torque from the load cannot back-drive the input shaft.
Universal Speed Reducer Materials & Build Quality
Housing
Grey cast iron (HT200 grade), precision machined on all mating faces. The casting provides natural vibration attenuation and excellent thermal mass. Finished with a two-coat protective paint system — primer phosphate wash followed by polyurethane topcoat in standard industrial green. Custom colours including white and brown are available for specific sectors.
Worm Shaft
20CrMnTi alloy steel, carburised and case-hardened to HRC 58–62 on the thread flanks, then precision-ground to Ra 0.8 μm surface finish. This ensures a consistently smooth sliding contact surface that extends phosphor bronze wheel service life significantly compared to induction-hardened alternatives seen in budget worm drive reducer designs.
Worm Wheel
ZCuSn10Pb1 (tin-phosphor bronze), centrifugal-cast for dense, void-free grain structure, then hobbed to tight DIN 3974 tolerances. The phosphor bronze material is selected for its inherent lubricity, thermal conductivity, and compatibility with worm shaft hardened steel — reducing galling risk even during momentary lubrication starvation events.
Bearings & Seals
Tapered roller bearings on the output shaft (sizes 80 and above) and deep-groove ball bearings on the input — both sourced to C3 clearance class for reliable thermal expansion tolerance. NBR double-lip oil seals on all shaft exits, with a labyrinth dust shield on exterior-facing shafts where specified. These components are replaceable standard parts available worldwide.
Universal Speed Reducer Industry Applications
The EP-WPW worm gear reducer gearbox is in active service across these sectors globally — from agricultural machinery OEMs sourcing a new universal speed worm reducer, to plant engineers specifying a replacement universal speed reducer for an aging drive system.
Food & Beverage Processing
Conveyor belt drives, mixers, bottling lines, and filling equipment benefit from the WPW's quiet operation, self-locking output, and food-compatible white coat option. Large universal speed worm reducer frames (size 155–250) handle the continuous heavy torque demands of dough kneaders and industrial blenders in bakery and dairy facilities across Europe and North America.
Packaging Machinery
Carton erectors, pallet wrapping systems, and labelling machines demand compact gearboxes that deliver precise low-speed output without backlash drift over shift-after-shift operation. The electrical motors universal speed worm reducer pairing — WPW combined with a matched IEC-frame motor — is a popular size universal speed worm reducer solution for mid-range packaging OEMs building CE-marked machinery for the EU market.
Agricultural Equipment
Grain augers, seed metering systems, irrigation drives, and harvester auxiliary functions make frequent use of the worm speed reducer gear box configuration. The WPW's robust cast housing withstands dusty, high-humidity field environments that would quickly degrade lighter enclosed gearboxes. Australian and Canadian prairie farming operations have found the universal speed worm reducer nearby advantage of a stocked local distributor essential for minimal downtime.
Construction & Material Handling
Concrete mixer drums, aggregate conveyors, inclined belt feeders, and gate actuators demand both high torque and reliable position-holding. The self-locking characteristic of the worm drive reducer eliminates the need for a separate holding brake in most gate and valve actuator installations. Heavy duty worm drive gearbox sizes 175 to 250 are regularly deployed in port materials handling and quarry screening plant operations in Brazil and Colombia.
HVAC & Water Treatment
Cooling tower fans, aerator drives, and sluice gate mechanisms operate continuously at moderate loads — exactly where a premium worm reducer gearbox earns its keep through low maintenance requirements and multi-year service life. The IP65-rated sealing option makes the WPW universal speed reducer suitable for outdoor water treatment installations in the Netherlands and UK where seasonal condensation and rainfall are persistent concerns.
Need a Universal Speed Reducer / Worm Gearbox with Specialist Guidance?
Our engineering team supports selection for size, ratio, shaft configuration, and motor pairing — including large universal speed worm reducer and replacement universal speed reducer assessments for existing installations.
About Us - Worm Gear Reducer Manufacturer
With over a decade of hands-on mechanical engineering and precision manufacturing behind us, our facility is built around one principle: industrial power transmission equipment should be engineered to outlast the machine it drives. Our production scope covers agricultural gearboxes, worm gear reducers, planetary gear drives, power take-off shafts, hydraulic cylinders, gears, chains, and motors — all produced under the same roof to maintain strict quality chain-of-custody from raw material to finished unit.
The facility holds ISO 9001:2015 certification, and our quality management procedures are applied across every production stage — from incoming material inspection of the cast iron blanks and phosphor bronze billets to final dimensional verification and run-in testing before dispatch. We also design and manufacture a wide range of non-standard mechanical components: ductile iron housings, cast steel gear blanks, precision-cast aluminum covers, sprockets, pulleys, worm shafts, and custom transmission assemblies tailored to customer-specific shaft layouts and load requirements.
Мастер-класс
Compatible Products & System Solutions
The EP-WPW universal speed reducer is designed for direct pairing with standard IEC motor frames and integrates seamlessly into complete drive packages.
Электродвигатели
Our IEC-frame three-phase and single-phase electric motors are dimensionally matched to the WPW worm gear reducer input shaft — enabling direct flange coupling without intermediate adaptors. Motor frames from 63 to 280 are stocked to cover the full WPW size 40 to 250 power range.
Червячная коробка передач
Beyond the WPW series, we manufacture the complete worm reducer kit lineup — including NMRV, WPA, WPS, and WD series gearboxes — covering centre distances from 25 mm to 400 mm and output torques from fractional to several thousand Newton-metres.
Часто задаваемые вопросы
Common questions from engineers, procurement managers, and maintenance teams evaluating the EP-WPW worm gear speed reducer for new and replacement installations.
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