EP-WPWX-O Universal hastighetsreducerare
The EP-WPWX-O series comprises universal speed reducers available in WPWX and WPWO configurations, designed for versatile industrial power transmission. Covering sizes 40 to 250, these units offer reduction ratios from 1/5 to 1/60. Weighing between 5 kg and 374 kg, they feature robust cast iron housings and highly flexible shaft direction options (A-C for WPWX, A-F for WPWO) to suit complex machinery layouts. Key specifications include input shafts up to 18×7 mm and output shafts up to 25×9 mm. This series ensures reliable torque transmission and durability, providing adaptable solutions for heavy-load applications requiring precise speed control in compact spaces.
EP-WPWX-O Series
EP-WPWX-O Universal hastighetsreducerare
Flange-output worm gear speed reducer engineered for vertical shaft, agitator, and hoisting duties — available from 5 kg to 374 kg, sizes 40–250, reduction ratios 1/5 to 1/60. Two variants: WPWX (through-shaft horizontal) and WPWO (solid vertical output shaft).
EP-WPWX-O Universal Speed Reducer Dimensional Specifications
All dimensions in millimetres (mm). Data applies to both WPWX and WPWO Universal Speed Reducer configurations within the same frame size. Shaft and keyway dimensions are consistent across the range for replacement universal speed reducer drop-in compatibility. Scroll horizontally on mobile to view the full table.
| Storlek | Förhållande | En | AB | BB | BC | Kreditkort | M | N | E | E₁ | E₂ | G | Z | HS | U | T×V (In) | LS | S | W×Y (Out) | Weight (kg) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 40 | 1/5–1/60 | 143 | 87 | 74 | 45 | 40 | 95 | 187 | 70 | 72 | 97 | 12 | 10 | 25 | 12 | 4×2,5 | 28 | 14 | 5×3 | 5 |
| 50 | 1/5–1/60 | 175 | 108 | 97 | 50 | 50 | 111 | 226 | 90 | 90 | 110 | 14 | 12 | 30 | 12 | 4×2,5 | 40 | 17 | 5×3 | 8 |
| 60 | 1/5–1/60 | 198 | 120 | 112 | 55 | 60 | 127 | 257 | 100 | 102 | 129 | 15 | 12 | 40 | 15 | 5×3 | 50 | 22 | 7×4 | 11 |
| 70 | 1/5–1/60 | 231 | 140 | 131 | 65 | 70 | 152 | 305 | 120 | 120 | 155 | 20 | 15 | 40 | 18 | 5×3 | 60 | 28 | 7×4 | 15.5 |
| 80 | 1/5–1/60 | 261 | 160 | 142 | 70 | 80 | 174 | 350 | 140 | 140 | 180 | 20 | 15 | 50 | 22 | 7×4 | 65 | 32 | 10×4,5 | 24 |
| 100 | 1/5–1/60 | 322 | 190 | 169 | 90 | 100 | 224 | 410 | 190 | 165 | 215 | 22 | 15 | 50 | 25 | 7×4 | 75 | 38 | 10×4,5 | 38 |
| 120 | 1/5–1/60 | 371 | 219 | 190 | 100 | 120 | 264 | 494 | 220 | 195 | 255 | 25 | 18 | 65 | 30 | 7×4 | 85 | 45 | 12×4,5 | 56 |
| 135 | 1/5–1/60 | 422 | 249 | 210 | 110 | 135 | 304 | 559 | 260 | 230 | 285 | 30 | 18 | 75 | 35 | 10×4,5 | 95 | 55 | 16×6 | 84 |
| 155 | 1/5–1/60 | 497 | 295 | 252 | 140 | 155 | 345 | 605 | 290 | 250 | 305 | 35 | 21 | 65 | 40 | 12×5 | 110 | 60 | 18×7 | 129 |
| 175 | 1/5–1/60 | 534 | 314 | 255 | 150 | 175 | 374 | 675 | 320 | 273 | 348 | 40 | 21 | 85 | 45 | 14×5,5 | 110 | 65 | 18×7 | 157 |
| 200 | 1/5–1/60 | 580 | 342 | 319 | 175 | 200 | 424 | 749 | 370 | 305 | 390 | 40 | 24 | 95 | 50 | 14×5,5 | 125 | 70 | 20×7,5 | 224 |
| 250 | 1/5–1/60 | 705 | 420 | 385 | 200 | 250 | 510 | 920 | 440 | 375 | 475 | 45 | 28 | 110 | 60 | 18×7 | 155 | 90 | 25×9 | 374 |
All dimensions in millimetres (mm). Weights are approximate unit shipping weights. Keyway dimensions follow GB/T 1095 standard. Tolerance class per DIN 3974.
Five Reasons Engineers Specify the EP-WPWX-O Universal Speed Reducer
From agitator drives in the chemical industry to vertical conveyor take-ups in mining — here is what sets the WPWX-O apart from a standard worm speed reducer.
① Dual Variant Design — WPWX & WPWO
The EP-WPWX-O series universal speed reducer ships in two mechanically distinct configurations that share the same dimensional footprint. WPWX features a through-shaft layout with horizontal output, making it interchangeable with standard WPW universal speed worm reducers for horizontal conveyor or mixer applications. WPWO provides a solid vertical output shaft ideal for agitator paddles, hoisting drums, and direct-coupled rotary tables — eliminating the need for a separate right-angle bevel stage in vertical drive arrangements. Having both variants from one catalogue simplifies spares management for multi-machine facilities significantly.
② Six Shaft Configurations (WPWX: A–C / WPWO: A–F)
Most worm drive reducers offer one or two mounting orientations. The WPWX-O series universal speed reducer offers up to six WPWO shaft-direction configurations (A through F), covering virtually every spatial relationship between motor and driven load that an OEM machine builder might encounter. WPWX provides three configurations (A, B, C) for horizontal output applications. This breadth means a single product family can serve different stations on the same production line without re-engineering the drive arrangement — a tangible cost saving during machine development and when specifying replacement universal speed reducer units for existing plant.
③ Broad Size Range for Large Universal Speed Worm Reducer Needs
From the compact size 40 (5 kg) through to the substantial size 250 (374 kg), the WPWX-O covers a torque and power range that makes it equally relevant for a small packaging machine auxiliary drive and a large industrial mixer main drive. The size 250 unit — with M24 anchor bolts, an 18×7 mm input keyway, and a 25×9 mm output keyway — represents true large universal speed worm reducer capability, handling continuous output torques that rival many planetary gearbox equivalents at a fraction of the cost, particularly for applications requiring self-locking output behavior.
④ High Torque Worm Gearbox with Self-Locking Output
Every unit in the WPWX-O series universal speed reducer inherits the fundamental self-locking property of the worm gear pair — when the motor stops, the load cannot back-drive the input shaft. For agitators holding position, gate actuators, hoist mechanisms, and inclined conveyors, this eliminates the need and cost of a separate mechanical brake. Combined with the high torque worm gearbox output achievable through the 1/40, 1/50, and 1/60 ratio options, the WPWX-O provides genuine load-holding confidence in safety-critical applications across water treatment, chemical dosing, and bulk materials handling sectors worldwide.
⑤ ISO 9001:2015 Quality — Premium Worm Reducer at Scale
Produced under ISO 9001:2015 certified quality management, each WPWX-O universal speed reducer unit is dimensionally verified against engineering drawings before release. Critical bore tolerances, keyway depths, and shaft runout are measured and recorded. This production discipline, combined with standard DIN-referenced mounting dimensions, makes the EP-WPWX-O a genuine premium worm reducer that works as a direct drop-in replacement for most competing units of the same frame size — a characteristic that procurement teams at multi-site industrial operators in the UK, Australia, the Netherlands, and South Korea have come to rely upon when sourcing new universal speed worm reducers.
EP-WPWX-O: What This Universal Speed Reducer Covers
The EP-WPWX-O is a foot-and-flange-mounted worm gear speed reducer offered in two mechanically distinct variants under one series designation: WPWX (horizontal through-shaft) and WPWO (vertical solid output). Both share the same housing casting, gear centre distances, and mounting bolt patterns across all fourteen frame sizes from 40 to 250. This dimensional alignment means a facility can stock a single frame size and select either WPWX or WPWO configuration at the point of order without adjusting base frames, motor brackets, or coupling hardware.
The WPWO universal speed reducer configuration is of particular interest to OEM builders of mixers, aerators, chemical reactors, and vertical pumping systems. Its solid downward-facing output shaft accepts standard coupling hubs or direct-fit impeller attachments, avoiding the bevel-stage complexity common in alternative vertical drive solutions. This makes the WPWX-O universal speed worm gear reducer a practical alternative to more expensive inline gear units for vertical agitation duties operating below 100 RPM output speed.
Working Principle of the Worm Gear Speed Reducer
The worm gear reducer operates through a 90-degree crossed-axis gear pair: a hardened alloy steel worm shaft (the driving element) meshes with a phosphor bronze worm wheel in a sliding-contact motion. As the motor rotates the worm, the helical thread advances the wheel tooth-by-tooth at a rate determined by the number of thread starts and wheel teeth — this is the worm gear reduction ratio. A single-start worm with a 40-tooth wheel delivers a 1/40 ratio; each full revolution of the worm advances the wheel by exactly one tooth pitch, producing smooth and continuous output rotation at dramatically reduced speed and proportionally increased torque.
In the WPWX-O universal speed reducer, the worm shaft is supported by preloaded taper roller bearings (sizes 80 and above) or matched angular contact ball bearings (smaller sizes), ensuring that the axial thrust generated by the helical worm thread is properly reacted within the housing rather than transmitted to connected motor or shaft couplings. The phosphor bronze wheel hub is keyed and retained on the output shaft with a precision ground bore, keeping gear mesh alignment stable under cyclic load reversals.
One frequently asked question: do worm gears reduce speed effectively at both light and heavy loads? The answer is yes — worm gear speed reducers maintain their ratio relationship regardless of load, though efficiency varies. At higher reduction ratios (1/40 to 1/60), the self-locking property becomes more pronounced as lead angle decreases, making back-driving mechanically impossible without applying significant reverse torque beyond the frictional resistance of the gear mesh. This is the working principle behind the WPWX-O universal speed reducer's suitability for hoisting and inclined conveyor applications where load holding is a safety requirement.
Universal Speed Reducer Material Specification & Build Standards
Gear Housing
HT200 grey cast iron, sand-cast and stress-relieved before precision machining on all mating surfaces, bearing bores, and shaft exits. The material grade provides tensile strength of approximately 200 MPa — adequate for the bending and torsional loads experienced in heavy continuous-duty applications — while its inherent graphite microstructure provides natural vibration damping absent in fabricated steel housings. Surface finish: two-coat protective paint over phosphate primer. Custom colour options include white and brown for sector-specific requirements.
Maskaxel
20CrMnTi alloy steel — carburised, hardened to HRC 58–62 on thread flanks, and cylindrical-ground to Ra 0.8 μm surface roughness. The case depth of 0.8–1.2 mm provides a hard wear surface over a tough core, resisting both surface fatigue and shock fracture. This specification is standard in premium worm reducer gearbox production and significantly extends service life versus induction-hardened alternatives. Thread profile: ZA or ZN archimedes form for consistent mesh contact across the full face width of the worm wheel.
Snäckhjul
ZCuSn10Pb1 phosphor bronze, centrifugally cast to eliminate porosity then hobbed on CNC gear-cutting equipment to DIN 3974 accuracy class. The bronze alloy provides low friction against the hardened steel worm, self-lubricating characteristics under marginal oil film conditions, and excellent thermal conductivity to draw frictional heat away from the mesh zone. The wheel rim is shrunk and keyed onto a ductile iron or cast steel hub, combining the tribological advantage of bronze at the contact surface with the structural strength of iron at the bore.
Bearings & Sealing
Taper roller bearings on the worm shaft (size 80+) manage the combined radial and axial loads generated by the helical thread geometry. Deep-groove ball bearings are used on the output shaft of smaller frames. All bearings are sourced to C3 radial clearance, compensating for thermal expansion during continuous operation. NBR double-lip radial shaft seals are fitted at all shaft exits, with a labyrinth pre-seal on outdoor or dusty environment variants. Oil drain and level plugs are standard on all frames, with a breather vent fitted to frames 100 and above.
Where the EP-WPWX-O Universal Speed Reducer Works
The WPWX-O universal speed reducer's combination of horizontal and vertical output variants, broad ratio range, and inherent self-locking output makes it applicable across more industry sectors than a single-configuration worm drive speed reducer. Below are the key application areas served globally.
Chemical & Water Treatment
Agitator drives, chemical dosing pumps, aeration systems, and sludge scrapers rely on the WPWO vertical output shaft variant. The self-locking worm gear gearbox output prevents paddle back-spin when the motor de-energises — a critical safety requirement in chemical reactor installations in the Netherlands, Germany, and UK where EC Machinery Directive compliance mandates mechanical safeguards against uncontrolled reverse motion. Size 100 to 175 frames are the most frequently specified for municipal water treatment duties.
Mining & Bulk Material Handling
Inclined belt take-ups, pan conveyor drives, and slurry agitators operating in Australian mining operations demand heavy duty worm drive gearboxes that tolerate dust ingress, vibration, and occasional overloads. The WPWX size 155 to 250 frames handle these conditions within a robust cast iron housing that requires minimal maintenance over thousands of operating hours. The worm gear reduction ratio flexibility from 1/5 to 1/60 means drive speed can be matched to conveyor requirements without changing motor frames or adding chain-drive stages.
Food Processing & Beverage
Mixing vats, dosing conveyors, and bottling line auxiliary drives in food-grade environments benefit from the WPW-series white universal speed worm reducer finish option and sealed bearing cartridges that prevent lubricant contamination of the product zone. Electrical motors universal speed worm reducer combinations — with matched IEC-frame motors supplied from the same source — simplify HACCP documentation for food-sector OEMs in Canada and the UK by reducing the number of component suppliers listed in the technical file.
Jordbruksmaskiner
Feed mixing augers, seed-treating drums, irrigation pivot drives, and post-harvest processing equipment across Brazilian and Colombian agro-industry use the universal speed worm reducer in sizes 40 to 135 for compact, low-maintenance drive solutions in high-humidity environments. The brown universal speed worm reducer finish option with IP65-rated shaft seals suits outdoor installations subject to seasonal rain. New universal speed worm reducer units can be configured with multiple shaft-direction options to suit space-constrained machine frames common in trailer-mounted agricultural processing equipment.
Construction Equipment
Concrete drum rotation drives, aggregate screening mechanisms, and mortar mixer main drives in construction applications operating in South Korea and Brazil rely on the size 135 to 250 range for their high torque output and structural rigidity under intermittent heavy-shock loading. The worm reducer motor combination with an IEC-frame motor on a C-face adaptor bracket is a common drive package for drum mixer OEMs — the WPWX-O's consistent mounting hole pattern across frame sizes simplifies assembly line integration when building machines in multiple output capacity variants.
Ready to Specify a Universal Speed Worm Gear Reducer?
Our team provides frame-size selection support, shaft-direction configuration guidance, and motor pairing recommendations — including assessments for large universal speed worm reducer installations and size universal speed worm reducer queries for existing machinery upgrades.
10+ Years of Mechanical Transmission Manufacturing
Our production facility brings over a decade of focused experience in industrial power transmission engineering. The product range spans agricultural gearboxes, worm gear reducers, planetary gear drives, power take-off shafts, hydraulic cylinders, drive chains, sprockets, and electric motors — manufactured end-to-end within our own facility rather than assembled from third-party sub-components. This vertical integration is the foundation of the dimensional consistency and quality repeatability that worm gear reducer manufacturers need to serve replacement markets reliably.
Verkstad
Universal Speed Reducer System-Compatible Products
The EP-WPWX-O universal speed reducer is designed to integrate directly with standard IEC motor frames and the wider worm gearbox series. Sourcing both drive components together eliminates compatibility risk and simplifies technical documentation for CE-marked machinery.
Elmotorer
Three-phase and single-phase IEC-frame motors matched to the WPWX-O input shaft dimensions across all fourteen frame sizes. Supplying motor and worm reducer as a factory-paired unit removes the tolerance stack-up risk between motor stub shaft and gearbox input bore — a common cause of premature input bearing failure when sourcing components separately. We stock motor frames from 63 to 280, covering the full power range applicable to the size 40 to 250 WPWX-O series.
Full Worm Gearbox Series
The WPWX-O sits within a broader worm reducer kit portfolio covering NMRV, WPA, WPS, WD, and WPW series units — from 25 mm centre distance compact units to 400 mm heavy industrial frames. Every unit in the range shares the same material standards (HT200 housing, ZCuSn10Pb1 bronze wheel, 20CrMnTi worm shaft) and the same quality management process, making the full series a coherent one-stop supply solution for industrial distributors and plant engineering teams managing drive trains across multiple product types.
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