EP-WPWV-T Universal Speed Reducer
The EP-WPWV-T is a cast iron universal speed reducer built on two complementary housing variants within the same WPW dimensional family: the WPWV, which delivers a vertical output shaft from a horizontal input, and the WPWT, which provides a top-mounted output shaft with an upward-facing output bore — making it the go-to selection when installation geometry demands output in a direction that standard horizontal reducers cannot accommodate. Both variants share the same eleven frame sizes (40 through 250), the same reduction ratio steps from 1/5 to 1/60, and the same shaft interface dimensions, which significantly simplifies machine design when output orientation needs to change between product variants or regional specifications.
Spanning a weight range from 5 kg at size 40 up to 374 kg at size 250, this worm gear speed reducer covers applications from small instrumentation drives and light conveyor transfers all the way to heavy-duty mixing tanks, rotary indexing tables, and vertical-axis agitation systems. The broad size range within a single housing family means an engineer specifying this product for a new machine design can select the exact torque class needed without over-buying — a factor that matters both to equipment cost and to available mounting envelope, particularly in compact or height-restricted installations.
EP-WPWV-T Universal Speed Reducer
WPWV & WPWT Series Worm Gear Speed Reducer — Size 40–250 | Ratio 1/5–1/60 | Up to 374 kg | Vertical & Top-Output Configurations
EP-WPWV-T Universal Speed Reducer Technical Specifications
All dimensions in millimetres unless noted. Use the horizontal scroll bar on small screens to view all columns.
| ขนาด | อัตราส่วน | เอบี | BB | ซีซี | LL | เอ็ม | เอ็น | อี | E₁ | E₂ | จี | ซ | HS | ยู | T×V | LS | เอส | Weight (kg) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 40 | 1/5 | 87 | 74 | 40 | 63 | 90 | 187 | 70 | 72 | 97 | 12 | 10 | 25 | 12 | 4×2.5 | 28 | 14 | 5 |
| 50 | 1/10 | 108 | 97 | 50 | 70 | 120 | 226 | 95 | 90 | 110 | 14 | 12 | 30 | 12 | 4×2.5 | 40 | 17 | 8 |
| 60 | 1/15 | 120 | 112 | 60 | 80 | 130 | 257 | 105 | 102 | 129 | 15 | 12 | 40 | 15 | 5×3 | 50 | 22 | 11 |
| 70 | 1/20 | 140 | 131 | 70 | 95 | 150 | 305 | 115 | 120 | 155 | 20 | 15 | 40 | 18 | 5×3 | 60 | 28 | 15.5 |
| 80 | 1/25 | 160 | 142 | 80 | 105 | 170 | 350 | 135 | 140 | 180 | 20 | 15 | 50 | 22 | 7×4 | 65 | 32 | 24 |
| 100 | 1/30 | 190 | 169 | 100 | 135 | 190 | 410 | 155 | 165 | 215 | 22 | 15 | 50 | 25 | 7×4 | 75 | 38 | 38 |
| 120 | 1/40 | 219 | 190 | 120 | 160 | 230 | 494 | 180 | 195 | 255 | 25 | 18 | 65 | 30 | 7×4 | 85 | 45 | 56 |
| 135 | 1/50 | 249 | 210 | 135 | 185 | 250 | 559 | 200 | 230 | 285 | 30 | 18 | 75 | 35 | 10×4.5 | 95 | 55 | 84 |
| 155 | 1/60 | 295 | 252 | 155 | 220 | 275 | 605 | 220 | 250 | 305 | 35 | 21 | 85 | 40 | 12×5 | 110 | 60 | 129 |
| 175 | 1/60 | 314 | 255 | 175 | 240 | 310 | 675 | 250 | 273 | 348 | 40 | 21 | 85 | 45 | 14×5.5 | 110 | 65 | 157 |
| 200 | 1/60 | 342 | 319 | 200 | 280 | 360 | 749 | 290 | 305 | 390 | 40 | 24 | 95 | 50 | 14×5.5 | 125 | 70 | 224 |
| 250 | 1/60 | 420 | 385 | 250 | 315 | 460 | 920 | 380 | 375 | 475 | 45 | 28 | 110 | 60 | 18×7 | 155 | 90 | 374 |
Five Key Advantages of the EP-WPWV-T Universal Speed Reducer
① Vertical & Top-Output Geometry in One Family
Two housing variants — WPWV and WPWT Universal Speed Reducer — provide vertical and top-shaft output options from the same dimensional template. Machine builders can switch output orientation across different equipment models without sourcing from a new supplier or re-validating shaft interface dimensions. This consistency reduces procurement complexity for OEMs producing multiple equipment variants for different markets.
② Extended Shaft Direction Options
The WPWT universal speed reducer variant supports five distinct shaft direction configurations (A–E), including dual-output arrangements. This is significantly more layout flexibility than most competing heavy-duty worm drive gearboxes of equivalent size offer as standard. For plant engineers in Germany, South Korea, and Brazil who regularly face non-standard drive geometry requirements, this catalogue depth reduces the need for custom fabricated adaptors.
③ High-Ratio Self-Braking Capability
At reduction ratios of 1/40 and above, the shallow lead angle of the worm thread creates sufficient friction to prevent back-driving under most static load conditions. For vertical-axis drives — which are the primary application of the WPWV and WPWT variants — this characteristic eliminates the need for a separate mechanical or electrical holding brake in many load-holding installations, reducing system cost and component count.
④ Consistent Shaft Interface Dimensions Across Sizes
Input and output shaft diameters, keyway dimensions (T×V), and mounting bolt patterns follow a predictable scaling pattern across the full size 40–250 range. When an application requires a larger torque class than originally specified — a common outcome as process loads increase over time — upsizing to the next frame size requires only straightforward changes to the motor bracket and coupling, not a complete drive system redesign.
⑤ Broad Torque Coverage — 5 kg to 374 kg
The 374 kg size 250 unit is one of the largest standard catalogue worm gear reducers available, covering applications in heavy industrial mixing and large-scale conveyance where custom gearbox solutions would otherwise be required. Having this capacity within a standard catalogued product means shorter lead times, documented replacement dimensions, and a known spare part path — advantages that matter significantly on 24/7 industrial operations in Southeast Asia, the Middle East, and Australia.
Operating Principle — How the WPWV & WPWT Worm Drive Reducer Works
At the core of any universal speed reducer in the WPW line is the worm gear meshing pair. The hardened worm shaft — rotating at motor speed — carries a helical thread that engages the curved tooth profile of the worm wheel at precisely 90 degrees. Each complete revolution of the worm shaft advances the wheel by exactly one tooth pitch, so the output speed is reduced by a factor equal to the number of wheel teeth divided by the number of thread starts on the worm. This is the mechanical basis of worm gear reduction ratio selection: a 60-tooth wheel with a single-start worm gives 1/60 reduction; a 10-tooth increment produces 1/10 reduction.
In the WPWV variant, the worm wheel output shaft exits perpendicular to the mounting base — pointing downward or to the side depending on the installation orientation. This geometry is useful when the driven element (a mixing paddle, an indexing table, a conveyor roller) sits below the gearbox in the machine structure. In the WPWT, the output extends upward through the housing top, which suits applications where the drive source sits below the process vessel or conveyor structure and the output shaft needs to reach upward into the driven element. Both configurations maintain the same worm-gear physics: the output torque equals the input torque multiplied by the worm gear reduction ratio, reduced by the mechanical efficiency of the worm mesh at that ratio.
Efficiency decreases as the reduction ratio increases — a fundamental characteristic of worm gear drives that distinguishes them from helical or planetary stages. At 1/5 ratio, a well-made worm drive gearbox typically achieves 85–92% efficiency. At 1/60, this drops to 40–60%, and the set often becomes self-locking in reverse. For applications in the WPWV and WPWT range — vertical axis mixing, indexing, and slow-speed positioning — this efficiency trade-off is usually acceptable because the loads are continuous and the self-braking behaviour eliminates auxiliary braking hardware. Engineers evaluating this as a large universal speed worm reducer for high-duty continuous conveyor drives should factor thermal capacity carefully for ratios above 1/30.
Universal Speed Reducer Materials & Engineering Standards
The housing of the EP-WPWV-T universal speed reducer is cast in grey iron to GB/T 9439 HT200 grade — a material selected for its high compressive strength, vibration-damping capacity, and machinability, all relevant to a gearbox housing that must maintain bearing bore alignment under sustained loading through years of continuous operation. The external ribbing pattern common to WPW universal speed reducer housings is not merely cosmetic: the fins increase the external surface area by approximately 30–40% compared to a plain-walled box, directly improving passive convective heat rejection during continuous-duty cycles in environments where forced cooling is not installed.
The worm shaft is manufactured from 20CrMnTi alloy steel, carburised to a case depth of 0.8–1.2 mm, and surface-hardened to 58–62 HRC. This hardness, combined with the compressive residual stress from the carburising process, resists the adhesive and abrasive wear mechanisms that dominate worm contact surfaces — where sliding velocity between worm and wheel is fundamentally higher than in equivalent spur or helical gear contacts. The worm wheel is cast in ZCuSn10Pb1 phosphor bronze on a ductile iron hub: the bronze provides the conformability and low friction coefficient needed to protect the hardened worm flank across the run-in period and throughout service life, while the ductile iron hub handles torsional loads without brittle failure risk.
Application Scenarios — Where the WPWV & WPWT Universal Speed Reducer Fits
Rotary Indexing Tables — Germany & Japan
Precision rotary indexing tables used in CNC machining centres and automated assembly lines across Germany and Japan require a high-ratio worm gear reducer with minimal backlash and reliable self-holding at rest. The WPWT top-output configuration is well-matched to this application: the output shaft extends directly up into the table hub, the ratio of 1/40–1/60 provides the necessary holding friction, and the consistent input shaft dimensions across WPW universal speed reducer frame sizes allow the same motor flange to be used across multiple table diameter specifications.
Chemical & Pharmaceutical Mixer Drives — US & South Korea
Stirred reactor and mixing vessel drives in chemical plants across the US and South Korea commonly mount the motor and gearbox above the vessel, with the output shaft extending downward through a flange into the process fluid. The WPWV universal speed reducer vertical-output configuration is standard for this layout. At size 175–250 and 1/60 ratio, the EP-WPWV-T universal speed reducer delivers the low output RPM and high torque required for viscous fluid mixing without intermediate gear stages, and the self-braking function prevents the paddle from free-spinning when power is removed.
Overhead Conveyor & Trolley Drive — Australia & Southeast Asia
Overhead powered conveyor systems used in automotive painting, food processing, and garment manufacturing facilities in Australia, Malaysia, and Thailand use worm drive reducers in the trolley drive units. The WPWT top-output shaft enters the trolley wheel hub from below — a geometry that eliminates the need for a right-angle coupling or bevel gear intermediate stage. At size 60–100 and ratios of 1/20–1/30, the EP-WPWV-T universal speed reducer provides the controlled low speed and constant torque that overhead conveyor drives require for smooth product transport without vibration or speed fluctuation.
Gate & Valve Actuator Drives — Middle East & Brazil
Water treatment, irrigation infrastructure, and industrial process piping projects across the Middle East and Brazil require slow, powerful actuators for sluice gates, large-bore ball valves, and butterfly valves. The EP-WPWV-T universal speed reducer at sizes 120–200, combined with a worm reducer motor, provides the combination of high gear reduction ratio, self-locking at rest, and a vertical or top-mounted output shaft that connects directly to standard valve stem interfaces — all without the hydraulic system complexity that powered actuators require.
Ten-Plus Years of Worm Gear Reducer Manufacturing
Our facility has manufactured mechanical power transmission equipment for over a decade, building a product range that spans agricultural gearboxes, worm gear reducers, planetary gear drives, power take-off shafts, hydraulic cylinders, gears, sprockets, chains, and motors. The facility operates under ISO 9001:2015 certification, with documented quality procedures covering incoming material inspection, in-process dimensional checks, and final performance testing on every gearbox unit before shipment.
Design and manufacturing span a broad material range: ductile iron, cast iron, cast steel, precision cast steel, and cast aluminium housings are all produced in-house, along with gears, sprockets, worm gears, pulleys, worm shafts, and standard and non-standard mechanical components. This vertical integration gives us direct control over casting quality, machining tolerances, and heat treatment parameters — variables that determine the long-term reliability of a worm gear reducer in continuous-duty industrial service.
เวิร์คช็อป
System-Compatible Products — Complete Drive Package from One Supplier
The EP-WPWV-T universal speed reducer uses standard IEC-frame motor interfaces and industry-standard shaft dimensions throughout — making it easy to build a complete drive system from compatible products without custom fabrication.
Combining the EP-WPWV-T universal speed reducer with a matched electric motor produces a motorized worm reducer that arrives pre-aligned and ready to mount. Our electric motor range — single-phase and three-phase, 0.18–22 kW, IEC frame B3/B5/B14 — pairs directly with the input shaft dimensions of every WPW size. Ordering reducer and motor together eliminates the shaft coupling specification step and provides a single technical point of contact for the complete drive assembly, which simplifies commissioning across international projects where remote technical support is needed.
Where the WPWV/WPWT configuration doesn't suit the installation geometry, our extended worm gearbox range covers NMRV, RV, WD, and CW housing families — from 4 kg aluminium-body units at NMRV 25 up to heavy-duty cast iron configurations. Each family shares the same worm gear material and machining standards as the WPW series, providing consistent performance expectations across frame types.
คำถามที่พบบ่อย
Q1. What is the purpose of a universal speed reducer like the EP-WPWV-T in a vertical mixing drive for a chemical plant in the US or South Korea?
In a vertical mixing application, the universal speed reducer converts the high-speed, low-torque output of a standard electric motor into the low-speed, high-torque drive needed to turn a paddle, anchor impeller, or spiral ribbon mixer through a viscous chemical product. The WPWV vertical-output configuration specifically routes the output shaft downward from the reducer into the vessel shaft — matching the physical geometry of above-vessel motor mounting used in most stirred reactors. At 1/60 ratio, a 1400 rpm motor produces approximately 23 rpm at the output shaft with a corresponding torque multiplication of roughly 40× (accounting for mesh efficiency losses), which is within the operating range for medium-viscosity chemical mixing in process vessels used across US Gulf Coast and South Korean petrochemical facilities.
Q2. How does a worm gear reducer achieve self-braking, and when is this useful for vertical-axis drives in Australian industrial plants?
Self-braking in a worm gear reducer occurs when the worm thread lead angle is shallow enough that the friction between the worm flank and the wheel tooth prevents the load from back-driving the input shaft. At ratios of 1/40 and above in the EP-WPWV-T universal speed reducer, this condition is reliably achieved under most static load cases. For Australian industrial plants using the WPWV or WPWT configuration in gate actuators, scissor lifts, or vertical conveyor drives, self-braking eliminates the need for a powered electromagnetic brake to hold position when the motor is de-energised — reducing electrical and maintenance complexity. Engineers should verify the self-braking condition at the specific lead angle for their chosen ratio and load, since dynamic back-driving under vibration or shock can overcome static friction even in nominally self-locking configurations.
Q3. Which worm gear speed reducer size should a German machine builder select for a rotary indexing table that requires 45 Nm output torque at 30 rpm?
Starting from the required output: 45 Nm at 30 rpm, driven by a standard 1400 rpm motor, means a required ratio of 1400 ÷ 30 ≈ 1/47 — closest standard step in the EP-WPWV-T universal speed reducer is 1/50. The required input power is approximately 45 × 30 × 2π / 60,000 ÷ efficiency ≈ 0.18–0.22 kW depending on mesh efficiency at that ratio. From the dimensional data, size 60 (11 kg, AB=120 mm, output shaft HS=40, U=15, T×V=5×3) covers this torque class with margin. For a German machine builder who also needs the WPWT top-output configuration to suit the table hub geometry, size 60 in WPWT universal speed reducer configuration with a 0.25 kW motor gives appropriate safety margin above the calculated minimum.
Q4. Where can a maintenance engineer in Southeast Asia find a large universal speed worm reducer that is a direct dimensional replacement for a WPW size 175 unit?
The WPW universal speed reducer dimensional series follows a standardised pattern that is consistent across manufacturers producing to the same specification. For size 175 in the WPWV or WPWT universal speed reducer configuration, the key interface dimensions to confirm on the nameplate are: AB=314 mm, BB=255 mm, input shaft HS=85, U=45, T×V=14×5.5, output shaft LS=110, S=65. Any EP-WPWV-T universal speed reducer size 175 unit with matching nameplate data is a bolt-in replacement without shaft modification. Maintenance engineers in Malaysia, Vietnam, Thailand, or Indonesia who need a premium worm reducer as a drop-in replacement should also confirm the mounting bolt pattern (Z and G dimensions in the table) and the oil fill type — mineral gear oil ISO VG 220 is the standard recommendation for this frame size.
Q5. How should a worm gear reducer installation be carried out correctly when mounting a WPWT unit below an overhead conveyor in a Malaysian food processing facility?
Worm gear reducer installation in a WPWT universal speed reducer top-output configuration below an overhead conveyor involves three key steps that differ from standard horizontal reducer mounting. First, confirm the oil lubrication position: in the top-output orientation, the oil sump level and the breather/fill plug position shift relative to a standard horizontal installation — check the manufacturer's mounting orientation diagram for the correct oil level gauge position for your specific shaft direction variant. Second, ensure the output shaft coupling is aligned axially with the conveyor wheel hub to within 0.05 mm TIR before final bolt torque, as misalignment in WPWT universal speed reducer units is not self-correcting and will accelerate bearing wear. Third, in the warm, humid environment of a Malaysian food processing hall, choose a synthetic gear oil with a higher base viscosity index (ISO VG 220 synthetic) rather than straight mineral oil to maintain adequate film thickness at elevated sump temperatures during continuous production shifts.
Ready to Specify Your EP-WPWV-T Universal Speed Reducer?
Provide your input speed, required output torque, reduction ratio, and preferred output shaft orientation — our technical team will confirm the correct size and configuration for your application.
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