WPA Series Worm Gear Reducer

The WPA Series is an EVER-POWER single stage worm gearbox manufactured in Hangzhou and supplied factory-direct from Singapore. Gear ratios 1:5 – 1:60, max output torque 2,745 N·m, efficiency 60-82%. Input: Solid shaft. Output: Solid shaft. Mounting: Foot mounted. 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.

رمز المنتج: WPA التصنيف: علبة تروس دودية أحادية المرحلة الوسوم: single-stage worm gearbox, single-stage worm reducer, محرك تروس دودي, دودة العتاد المخفض, علبة تروس دودية

الوصف

ISO 9001:2015
CE

Input

Solid shaft

Horizontal

Output

Solid shaft

Horizontal

1:5 – 1:60

Single stage

Max Torque

2,745 N·m

Size 250

Mounting

Foot mounted

40–250 mm

1:5 – 1:60

Gear Ratio

60–82%

كفاءة

2,745 N·m

Max Output Torque

HRC 58–62

Gear Hardness

40–250 mm

مسافة المركز

Product Overview

WPA Series Worm Gear Reducer — Technical Overview

The WPA Series Worm Gear Reducer is the baseline foot-mounted configuration of the WP single-stage family, featuring horizontal solid shafts on both input and output. Centre distances of 40–250 mm span torques from 26 N·m to a peak of 2,745 N·m, covering light-duty feeders through to heavy conveyor and industrial drives within a single product line.

The 20CrMnTi worm shaft is carburised and quenched to HRC 58–62 and precision-ground to Ra ≤ 0.8 μm. The ZCuSn10Pb1 tin-bronze wheel is centrifugally cast for low sliding friction. Together these materials achieve 60–82% transmission efficiency. The integral HT250 cast iron housing is bored, face-machined, and leak-tested to 2.5 bar before dispatch.

Every WPA unit ships pre-filled with ISO VG220 gear oil from Singapore with full export documentation. Browse the complete single stage worm gearbox range or request a quotation for a 24‑hour response.

WPA worm gear reducer internal structure and component diagram

WP Series Worm Gear Reducer — Internal Structure and Main Components

Shaft Direction

WPA 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.

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

WPA 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
أ	Horizontal — below centre (standard)	Horizontal	Horizontal conveyor drives, standard floor-mounted machines
س	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
ت	Vertical — upward	Horizontal	Vertical input from above, tower or mast drives
V	Vertical — downward	Horizontal	Floor-level motor with downward vertical input shaft

ℹ Self-Locking Behaviour — WPA Series

The WPA is statically self-locking at ratios of 1:30 and above. The worm lead angle falls below the friction angle, preventing back-driving under static load or gravity. A secondary holding brake is therefore unnecessary in most inclined conveyor and positioning applications. For dynamic shock loads on hoist drives, an independent brake remains recommended per ISO 4301.

Dimensional Drawing

WPA 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.

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

WPA 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

تحديد

WPA 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

WPA worm gear reducer specification table — input power and output torque for all sizes and ratios (brochure p.8)

WPA Series — Parameter Table (brochure p.8) · 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)

مقاس	نسبة	Max Input (kW)	Max Output Torque	Weight (kg)	Oil (L)
WPA Series · Integral cast iron (P-type) · Foot mounted · 20CrMnTi Worm · ZCuSn10Pb1 Bronze Wheel · Input: 1,500 r/min
40	1/5–1/60	0.48	26 N·m	4	0.13
50	1/5–1/60	0.80	43 N·m	7	0.17
60	1/5–1/60	1.25	70 N·m	10	0.22
70	1/10–1/60	1.60	113 N·m	15	0.60
80	1/10–1/60	2.20	163 N·m	21	0.85
100	1/10–1/60	3.60	291 N·m	35	1.50
120	1/10–1/60	5.20	413 N·m	60	3.20
135	1/10–1/60	9.75	707 N·m	80	3.60
147	1/20–1/60	8.50	848 N·m	98	3.70
155	1/20–1/60	12.80	848 N·m	115	3.80
175	1/20–1/60	17.30	1,221 N·m	150	4.60
200	1/20–1/60	22.60	1,782 N·m	215	6.50
250	1/20–1/60	27.40	2,745 N·m	360	9.00

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

Material and Construction

Engineering Specifications — WPA Series

Worm Shaft

Primary drive element

Alloy grade20CrMnTi

Surface hardnessHRC 58–62

Heat treatmentCase carburising + quenching

Surface finishGround, Ra ≤ 0.8 μm

Shaft coreفولاذ 40Cr

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)

مواد التشحيمISO VG220 gear oil

InputSolid shaft

OutputSolid shaft

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)
Operating Condition	≤ 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)

ص — Input shaft power (kW)

ت — Corrected torque value (N·m)

n₂ — Output shaft speed (r/min)

u — Transmission efficiency (from table below)

نسبة	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

تشحيم

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	Synthetic oils	PG460	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	صدَفَة	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.

تشخيص الأعطال

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.
Vibration	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.

التطبيقات

WPA 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 WPA unit is inspected and pre-filled before dispatch.

WPA worm gear reducer installed in industrial drive application

WPA Series in Service

The WPA worm gear reducer serves conveyor, mixer, packaging, and agricultural drives across 40–250 mm centre distance.

🚧
Conveyor and Material Handling

WPA 60–250
Self-locking 1:30+

Inclined belt conveyors, screw conveyors, and bucket elevators benefit from the WPA self-locking characteristic at ratios above 1:30. Loads hold safely on power removal without a backstop. The foot-mounted base fits standard conveyor frame profiles and the horizontal solid shaft accepts sprockets or pulleys via jaw or rigid coupling.

🌾
Agricultural Equipment

WPA 40–135
Right-angle drive

Grain augers, TMR mixers, irrigation reel drives, and fertiliser spreaders. The 90° drive angle allows a compact perpendicular motor-to-shaft connection. Sizes 40–80 suit tight machine frames; sizes 100–135 handle higher torque in mixing and grinding tasks.

⚙
Packaging and Light Automation

WPA 40–100
Low vibration

Filling machines, capping heads, labelling stations, and rotary indexers. Low worm-mesh vibration protects sensors and applicators. The pre-filled ISO VG220 oil simplifies commissioning.

🏭
Heavy Industrial Drives

WPA 155–250
Up to 2,745 N·m

Rotary kiln drives, mixing drums, and crusher feed conveyors. Sizes 155–250 deliver sustained high torque in continuous heavy-duty service. The HT250 cast iron housing resists shock and radial loads from large sprockets and pulleys.

الشركة المصنعة

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.

التعليمات

Frequently Asked Questions — WPA Series Worm Gear Reducer

At what ratio does the WPA self-lock, and is it reliable for hoisting?+

Static self-locking begins at 1:30 where the lead angle falls below the friction angle. For hoist duties subject to shock or repeated starts, ISO 4301 recommends an independent brake alongside the inherent worm self-locking. Discuss your duty cycle with EVER-POWER before relying on self-locking alone in safety-critical lifting.

How do I specify a shaft direction when ordering?+

Append the code as a suffix: WPA 100‑1/30‑A denotes size 100, ratio 1:30, standard position A. Codes S, O, X, T, and V cover the five remaining orientations shown in Section 02 above. EVER-POWER confirms the required oil fill adjustment for each non-standard position.

What lubricant is required and how often should it be changed?+

Ships pre-filled with ISO VG220 mineral oil for −30°C to 40°C ambient. Switch to VG320–VG460 above 40°C. Change after the first 100 operating hours, then every 2,500 hours or 12 months. Synthetic oil is recommended for 24-hour continuous duty.

What is the MOQ and OEM customisation scope?+

MOQ 10 pcs, 30–45 days production. Sample units in 15–25 days. OEM scope: non-standard ratios, shaft diameters, keyways, branding. Email [email protected].

Are dimensional drawings or 3D CAD files available?+

2D DXF/PDF for all standard sizes within 24 hours at no charge. STEP 3D from 60 mm centre distance upward.

Request a Quote — WPA Series Worm Gear Reducer

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

مخفضات التروس

تتيح إمكانيات تصنيع المعدات ذات المستوى العالمي وموردي المواد عالية الجودة وعمليات الجودة المتطورة لشركة EPT تقديم أعلى مستوى من الدقة والمتانة والتحمل. تم تصميم وبناء مخفضات الكواكب EPT لتطبيقات رد الفعل العكسي المنخفضة عالية السرعة المتقدمة. تسمح لنا عمليات تصنيع EPT بتقديم قدرات استثنائية لحمل الصدمات وخيارات تركيب متنوعة.

المعالجة السطحية

التلدين، التقديس الطبيعي، المعالجة الحرارية، التلميع، طلاء النيكل، طلاء الكروم، طلاء الزنك، التخميل الأصفر، تخميل الذهب، الساتان، طلاء السطح الأسود إلخ.

أسلوب المعالجة

التصنيع باستخدام الحاسب الآلي، واللكم، والخراطة، والطحن، والحفر، والطحن، والتطرق، واللحام والتجميع

مراقبة الجودة والشهادة

يقوم الفنيون بالتحقق الذاتي من الإنتاج والفحص النهائي قبل الحزمة بواسطة مفتش الجودة المحترف
ISO9001:2008، ISO14001:2001، ISO/TS 16949:2009

الحزمة والمهلة الزمنية

الحجم: الرسومات
حالة خشبية / حاوية والبليت، أو حسب المواصفات المخصصة.
15-25days عينات. 30-45days الطلب الرسمي
الميناء: ميناء شانغهاي/نينغبو

التعليمات

س: هل أنت شركة تجارية أو الشركة المصنعة؟
ج: تتكون مجموعتنا من 3 مصانع وشركتين للمبيعات في الخارج.

س: هل تقدم عينات؟ هل هو مجاني أم إضافي؟
ج: نعم ، يمكننا تقديم العينة مجانًا ولكن لا ندفع تكلفة الشحن.

س: كم من الوقت هو وقت التسليم الخاص بك؟ ما هي شروط الدفع الخاصة بك؟
ج: بشكل عام 40-45 يومًا. قد يختلف الوقت حسب المنتج ومستوى التخصيص. بالنسبة للمنتجات القياسية، الدفع هو: 30% T/T مقدمًا، الرصيد قبل الشحن.

س: ما هو موك الدقيق أو السعر لمنتجك؟
ج: كشركة تصنيع المعدات الأصلية، يمكننا توفير منتجاتنا وتكييفها مع مجموعة واسعة من الاحتياجات. وبالتالي، قد يختلف موك والسعر بشكل كبير مع الحجم والمواد والمواصفات الأخرى؛ على سبيل المثال، عادةً ما يكون للمنتجات باهظة الثمن أو المنتجات القياسية موك أقل. يرجى الاتصال بنا مع جميع التفاصيل ذات الصلة للحصول على الاقتباس الأكثر دقة.