WPWA Series Universal Worm Gearbox

WPWA Series Universal Worm Gearbox

The WPWA Series is an EVER-POWER universal worm gearbox manufactured in Hangzhou and supplied factory-direct from Singapore. Gear ratios 1:5 – 1:60, max output torque 3,025 N·m, efficiency 60-82%. Input: Solid shaft. Output: Solid shaft. Mounting: Universal – foot preferred. Centre distance 40-250 mm. 20CrMnTi worm hardened to HRC 58-62. ISO 9001:2015 and CE certified. MOQ 10 pcs. Sample in 15-25 days. 24 h quote response.

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WPWA Series Universal Worm Gearbox
ISO 9001:2015
CE

Entrada
Solid shaft
Horizontal

Output
Solid shaft
Horizontal

Ratio
1:5 – 1:60
Universal single stage

Max Torque
3,025 N·m
Size 250

Mounting
Universal – foot preferred
40–250 mm

⚙
1:5 – 1:60
Gear Ratio
⚡
60–82%
Eficiencia
🔩
3,025 N·m
Max Output Torque
🛡
HRC 58–62
Gear Hardness
📐
40–250 mm
Centre Distance

01
Product Overview
WPWA Series Universal Worm Gearbox — Technical Overview

El WPWA Series Universal Worm Gearbox is the foot-preferred variant of the WPW universal family. The universal P-type housing provides six-face mounting capability while the primary specification targets foot-mounted operation with solid horizontal input and output shafts. Torques reach 3,025 N·m at size 250.

Solid horizontal input and output shafts, 20CrMnTi worm shaft at HRC 58–62, ZCuSn10Pb1 bronze wheel, integral P-type HT250 cast iron universal housing. Efficiency 60–82%. Pre-filled with ISO VG220. Leak-tested to 2.5 bar.

Factory-direct from Singapore. See the caja de engranajes helicoidales universal family or contact EVER-POWER.

WPWA worm gear reducer internal structure and component diagram

WP Series Worm Gear Reducer — Internal Structure and Main Components

02
Shaft Direction
WPWA Series — Input and Output Shaft Orientations
Multiple shaft direction positions are available. Specify the position code when ordering. Oil fill volume changes with non-standard orientations — EVER-POWER confirms the required adjustment.

WPWA worm gear reducer shaft direction diagram — input and output shaft orientation positions

WPWA Series — Shaft Direction Diagram · A: input below · S: input above · O: output upward · X: output downward · T: input upward · V: input downward

Code Input Shaft Position Output Shaft Position Typical Use
A Horizontal — below centre (standard) Horizontal Horizontal conveyor drives, standard floor-mounted machines
S Horizontal — above centre Horizontal Overhead mounting, inverted or top-fed drives
O Horizontal Vertical — upward Lifting columns, vertical screw drives, hoist applications
X Horizontal Vertical — downward Gravity-assisted feed, downward discharge drives
T Vertical — upward Horizontal Vertical input from above, tower or mast drives
V Vertical — downward Horizontal Floor-level motor with downward vertical input shaft
ℹ Universal Housing — WPWA Series
The WPWA universal housing is machined for six-face mounting. In its primary foot-mounted configuration it functions identically to the WPA but with slightly higher torque capacity from the reinforced housing. When an installation requires a non-standard orientation, the WPWA can be repositioned without a gearbox change.

03
Dimensional Drawing
WPWA Series — Overall Dimensions and Mounting Geometry
Full dimensional data covering 40–250 mm centre distance range. 2D DXF and PDF drawings available within 24 hours at no charge.

WPWA worm gear reducer dimensional drawing — overall dimensions mounting hole pattern and shaft sizes

WPWA Series — Structural Dimensional Drawing · All dimensions in mm · Sizes 40–250 mm · DXF and PDF on request within 24 hours

Dimension Symbol Reference
A / AB Overall length / length excluding shaft extension B / BB Overall height / base plate height
CC Output shaft centreline height above base HS / U Input shaft diameter / usable shaft length
T x V Input shaft key width x key depth LS / S Output shaft usable length / diameter
W x Y Output shaft key width x key depth E / F / G / M / N Foot mounting hole positions and pitch

04
Especificaciones
WPWA Series — Full Parameter Table
Input speed: 1,500 r/min · Housing: HT250 cast iron · Seal: NAK / SKF · Lubricant: ISO VG220 · MOQ: 10 pcs · Port: Shanghai / Ningbo

WPWA worm gear reducer specification table — input power and output torque for all sizes and ratios (brochure p.23)

WPWA Series — Parameter Table (brochure p.23) · Columns: Size · Ratio · A/AB/B/BB/CC/H/HL/M/N/E/F/G/Z · Input shaft HS/U/T×V · Output shaft LS/S/W×Y · Weight (kg) · Oil (L)

Talla Ratio Max Input (kW) Max Output Torque Weight (kg) Oil (L)
WPWA Series · Integral cast iron (P-type) · Universal – foot preferred · 20CrMnTi Worm · ZCuSn10Pb1 Bronze Wheel · Input: 1,500 r/min
40 1/5–1/60 0.48

26 N·m

 5 0.15
50 1/5–1/60 0.80

43 N·m

 9 0.46
60 1/5–1/60 1.25

70 N·m

 12 0.56
70 1/10–1/60 1.60

113 N·m

 18 0.95
80 1/10–1/60 2.20

163 N·m

 24 1.25
100 1/10–1/60 3.60

305 N·m

 40 3.00
120 1/10–1/60 5.20

440 N·m

 68 4.50
135 1/10–1/60 9.75

740 N·m

 90 7.00
147 1/20–1/60 8.50

883 N·m

 110 8.80
155 1/20–1/60 12.80

883 N·m

 128 9.60
175 1/20–1/60 17.30

1,272 N·m

 172 11.20
200 1/20–1/60 22.60

1,856 N·m

 240 13.50
250 1/20–1/60 27.40

3,025 N·m

 395 22.50

* Peak output torque at the highest-torque ratio per size · Full ratio-by-ratio data available — request the complete data sheet

05
Material and Construction
Engineering Specifications — WPWA Series

Worm Shaft
Primary drive element
Alloy grade20CrMnTi
Surface hardnessHRC 58–62
Heat treatmentCase carburising + quenching
Surface finishGround, Ra ≤ 0.8 μm
Shaft core40Cr steel
Worm Wheel
Output driven element
Alloy gradeZCuSn10Pb1 tin-bronze
Tooth formZI involute profile
Bearing brandSKF / C&U / HRB
Shaft sealNAK / SKF lip seal
Leak test2.5 bar · 100% of units
Housing and Assembly
Structure and sealing
Housing gradeHT250 grey cast iron
Housing formIntegral cast iron (P-type)
LubricanteISO VG220 gear oil
EntradaSolid shaft
OutputSolid shaft

06
Selection Correction Factors
Power Calculation and Correction Coefficient Tables
Apply correction factors a₁ and a₂ to the rated torque before selecting a gearbox size. Use Table 3 to verify motor input power.

Table 1
Ambient Temperature Correction Coefficient a₁
Ambient Temperature (°C) 10 – 25 26 – 30 31 – 40 41 – 50
a₁ 1.0 1.1 1.0 1.6

Table 2
Duty Condition Correction Coefficient a₂
Operating Condition Daily Running Hours (h)
≤ 2 h > 2 – 10 h > 10 – 24 h
Smooth running 0.8 1.0 1.2
Moderate shock load 1.0 1.2 1.4
Heavy shock load 1.25 1.5 1.75
ℹ If the gearbox starts, reverses, or changes direction 12 or more times per hour during operation, multiply the table value by an additional factor of 1.2.

Table 3
Input Shaft Power Calculation and Efficiency Coefficient u
Input Power Formula
P = T × n₂ ÷ (9550 × u)
P — Input shaft power (kW)
T — Corrected torque value (N·m)
n₂ — Output shaft speed (r/min)
u — Transmission efficiency (from table below)

Ratio 1:10 1:15 1:20 1:25 1:30 1:40 1:50 1:60
Efficiency u 0.76–0.90 0.75–0.86 0.74–0.84 0.72–0.82 0.68–0.70 0.65–0.75 0.62–0.72 0.60–0.70

07
Lubricación
Recommended Lubricants by Speed and Temperature
Select oil grade based on worm shaft speed and mounting orientation. Change after the first 100 operating hours, then every 2,500 hours.

Oil Grade Selection by Worm Shaft Speed and Operating Position
Worm Shaft Speed (r/min) Oil Type Upper Worm / Vertical Lower Output Shaft Vertical
Over Up to
1,000 3,000 Synthetic oils PG460 PG220
— 1,000 PG460
2,000 3,000 Mineral oils ISO VG460 ISO VG200
750 2,000 ISO VG320
250 750 ISO VG460
— 250 Mineral oils ISO VG660 ISO VG660

International Brand Equivalents by Ambient Temperature
Ambient Temp. Oil Type Esso Texaco Mobil Caparazón AGMA
15–60°C
−9 to −16°C		 Mineral oils Spartan EP220 Regal Oil R&D 320 DTE LIL BB Shell Omala Oil 220 5
Compounded oils Sparan EP320 631-Honor Cylinder Oil Mobil 600W Cylinder Oil Shell Omala Oil 320 7
Extreme pressure Spartan EP460 Meropa 460 Mobil Gears 634 Shell Omala Oil 460 7EP
50–125°C
10–52°C		 Mineral oils Spartan EP320 Regal Oil 320 DTE OIL AA Shell Omala Oil 320 6
Compounded oils Spartan EP460 642-650T Cylinder Oil Mobil 600W Super Cylinder Oil Shell Omala Oil 460 8
Extreme pressure Spartan EP680 Meropa 680 Mobil Gears 636 Shell Omala Oil 660 8EP
ℹ Drain and flush the unit after the first 100 operating hours. Thereafter, change oil every 2,500 hours or 12 months, whichever comes first. Use synthetic oil for continuous 24-hour duty.

08
Diagnóstico de fallas
Troubleshooting Guide — Common Faults and Remedies
Identify the fault symptom, locate the probable cause, and apply the recommended corrective action before returning the unit to service.

Fault Symptom Probable Cause Recommended Action
Overheating Motor, gearbox, or driven machine misaligned at coupling Re-align all three shafts to be co-axial. Check coupling and re-torque fasteners.
Overload running Reduce load to within rated torque. Apply correction factors a₁ and a₂.
Lip seal worn or excessively tight Apply grease at the seal lips; replace seal if worn.
Incorrect oil level or degraded lubricant Top up or drain and refill to the correct level. Use the grade specified in Table 4.
Vibración Motor, gearbox, or driven machine poorly fixed or misaligned Inspect and re-tighten all mounting fasteners. Re-align coupling.
Worm wheel tooth surface worn or damaged Replace the worm wheel assembly.
Bearing worn Replace bearing. Check shaft for scoring before refitting.
Abnormal Noise Bearing worn or clearance too large Replace bearing and adjust preload.
Poor worm wheel tooth mesh Check and adjust tooth contact; replace worm wheel pair if necessary.
Insufficient lubricant Top up oil to the correct level.
Foreign matter in housing Drain oil completely, flush housing, remove debris, refill with fresh oil.
Oil Leakage Lip seal damaged Replace lip seal.
Shaft journal surface worn at seal contact Replace input or output shaft. Fit new seal to match.
Oil overfilled Drain to the correct level per the oil gauge indicator.
Drain plug loose or oil gauge cracked Re-seal and tighten drain plug. Replace oil gauge if cracked.
Rapid Worm Wheel Wear Overload running Reduce load; check application duty factors against rated capacity.
Wrong lubricant grade Drain and refill with the correct grade from Table 4.
Insufficient lubricant Top up to the correct level at the oil gauge.
Oil change interval exceeded; lubricant degraded Drain, flush, and refill per the maintenance schedule.
Operating temperature too high Resolve overheating fault first (see above), then reduce ambient temperature or improve ventilation.

06
Aplicaciones
WPWA Series — Industry Use Cases

EVER-POWER worm gearbox manufacturing facility Hangzhou — CNC gear hobbing and precision assembly

EVER-POWER Manufacturing
CNC gear hobbing, heat treatment, and 100% pressure-testing in Hangzhou. Every WPWA unit is inspected and pre-filled before dispatch.
WPWA worm gear reducer installed in industrial drive application

WPWA Series in Service
The WPWA worm gear reducer serves conveyor, mixer, packaging, and agricultural drives across 40–250 mm centre distance.
🚧
Standard and Adaptable Conveyor Drives

WPWA 60–250
Foot mount primary

Conveyor drives where foot mounting is primary but the universal housing provides reassurance that orientation changes during commissioning or future plant modifications do not require a gearbox replacement.

🌾
Agricultural Equipment Multi-Variant

WPWA 40–135
Foot preferred universal

Agricultural machinery produced in foot-mounted standard and non-standard variants, covered by a single WPWA part number across all configurations.

🏭
Industrial Standard Drives with Spares Flexibility

WPWA 100–250
Up to 3,025 N·m

Industrial process drives where foot mounting is standard but the universal housing simplifies spare parts management by covering multiple orientations from a single stock item.

⚙
Packaging and Automation Flexible Drives

WPWA 40–100
Universal compact

Automation and packaging machinery where the drive layout may be revised between production batches, and a single WPWA stock item covers all anticipated orientations.

07
Fabricante
EVER-POWER PTE. LTD. — Factory Direct from Singapore
Singapore-registered. Hangzhou manufacturing. No intermediaries — factory pricing and ISO-certified quality on every order.

EVER-POWER worm gearbox factory Hangzhou — production floor

EVER-POWER Production Base · Hangzhou, China · 3 Plants · CNC Gear Hobbing · Heat Treatment · 100% Pressure-Test

EVER-POWER PTE. LTD.
Singapore Registered · Hangzhou Manufacturing · 20+ Years Experience

ISO 9001:2015
CE Certified
Triple ISO

🏭
3 Plants
Manufacturing Facilities
CNC gear hobbing, case-hardening, assembly, and 100% pressure-test in Hangzhou.
🔬
HRC 58–62
Worm Shaft Hardness
Case carburising and quenching on every shaft. Ra ≤ 0.8 μm ground finish. Hardness verified by Rockwell test.
📦
MOQ 10 pcs
OEM from Small Batches
Custom ratios, shaft sizes, keyways. Sample 15–25 days; production 30–45 days.
🌎
50+ Countries
Global Export
EU · US · UK · AU · NL · BR · CA · KR. DDP and DAP available.
📋
Triple ISO
Certified Quality
ISO 9001:2015 · ISO 14001 · ISO 45001. CE marking on request.
⚡
24 h
Quote Response
Send size, ratio, quantity, application. Full quote + drawing within 24 hours.

PREGUNTAS FRECUENTES
Frequently Asked Questions — WPWA Series Universal Worm Gearbox
How does the WPWA differ from the WPW?+
Both use the universal P-type housing. WPWA is the foot-preferred sub-variant; WPW is the general universal variant. Internal specifications, ratios, and torque ratings are identical.
Can the WPWA be mounted in any orientation?+
Yes. All six standard positions are available. Oil fill must be adjusted for each orientation — EVER-POWER confirms the volume.
Does the WPWA self-lock?+
Yes, at ratios of 1:30 and above.
What is the MOQ and lead time?+
MOQ 10 pcs, 30–45 days. Samples 15–25 days.
Are drawings available?+
2D DXF/PDF for all sizes within 24 hours.

Request a Quote — WPWA Series Universal Worm Gearbox
Provide your required centre distance (40–250 mm), gear ratio (1:5 – 1:60), shaft direction, mounting type, and quantity. Full quotation with dimensional drawing returned within 24 hours.

MOQ 10 pcs

Sample 15–25 days

Quote in 24 hours

DDP / DAP available

Request a Quote →
Email Us Directly

📞 +65 8866 2737 · Singapore

Reductores

Las capacidades de fabricación de engranajes de clase mundial, los proveedores de materiales de calidad y un proceso de calidad de vanguardia permiten a EPT ofrecer el más alto nivel de precisión, durabilidad y resistencia. El EPT reductores planetarios están diseñados y construidos para aplicaciones avanzadas de alta velocidad de bajo juego. Los procesos de fabricación EPT nos permite ofrecer excepcionales capacidades de carga de choque y diversas opciones de montaje.

Tratamiento de superficies

Recocido, canonización natural, tratamiento térmico, pulido, niquelado, cromado, zincado, pasivado amarillo, pasivado dorado, satinado, pintado en negro, etc.

Método de tratamiento

Mecanizado CNC, punzonado, torneado, fresado, taladrado, rectificado, brochado, soldadura y montaje

Control de calidad y certificado

Autocomprobación de los técnicos en la producción, comprobación final antes del embalaje por un inspector de calidad profesional.
ISO9001:2008 , ISO14001:2001,ISO/TS 16949:2009

Paquete y plazo de entrega

Tamaño Dibujos
Caja/contenedor de madera y palet, o según especificaciones personalizadas.
15-25días muestras. 30-45days pedido offcial
Puerto: puerto de Shanghai/Ningbo

PREGUNTAS FRECUENTES

P: ¿Son ustedes comerciantes o fabricantes?
R: Nuestro grupo está formado por 3 fábricas y 2 empresas de ventas en el extranjero.

P: ¿Proporcionan muestras? ¿Son gratuitas o adicionales?
R: Sí, podríamos ofrecer la muestra de forma gratuita, pero no pagar el costo de la carga.

P: ¿Cuál es el plazo de entrega? Cuáles son sus condiciones de pago?
R: Generalmente es de 40-45 días. El plazo puede variar en función del producto y del nivel de personalización. Para los productos estándar, el pago es: 30% T/T por adelantado, saldo antes del envío.

P: ¿Cuál es el MOQ o precio exacto de su producto?
R: Como empresa OEM, podemos suministrar y adaptar nuestros productos a una amplia gama de necesidades, por lo que el MOQ y el precio pueden variar en gran medida en función del tamaño, el material y otras especificaciones. Póngase en contacto con nosotros con todos los detalles pertinentes para obtener el presupuesto más preciso.

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