superiortransmissioninc-products-EP-WPO Single Speed Reducer-0.36 to 23 L Oil Capacity

superiortransmissioninc-products-EP-WPX Single Speed Reducer-0.36 to 23 L Oil Capacity

EP-WPX-O Single Speed Reducer-0.36 to 23 L Oil Capacity

The EP-WPX-O covers a full family of single stage right-angle worm-gear speed reducers across 13 frame sizes — from compact 40 mm center-distance units weighing 5 kg with a 0.36 L oil fill, through to the heavy-duty 250 mm size carrying 340 kg and requiring 23.0 L of gear oil.

The WPX variant uses a dual-output shaft configuration — shafts protruding from both sides of the housing — which makes it particularly useful in applications where two driven loads need to be powered symmetrically from a single input. The WPO variant adopts a flange-face output that allows direct mounting of driven equipment without an intermediate coupling or bearing housing, shortening the overall drive train and reducing alignment sensitivity. Both share identical internal gear geometry, making interchangeability of internals across the two housing types straightforward at the maintenance level.

Gear ratios span 1/5 through 1/60 depending on frame size, with the 1/5 ratio available from size 60 upward and the 1/60 from sizes 155 and 175.

Категория: Single Speed Reducer

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EP-WPX-O Single Speed Reducer — 0.36 to 23 L Oil Capacity Series

The EP-WPX-O series is a dual-configuration single speed reducer platform encompassing the WPX horizontal-shaft and WPO flange-output variants. Choosing the optimal single speed reducer is critical for maintaining efficiency and reliability in continuous-duty applications. Engineered for demanding power transmission environments, both configurations share the same robust worm-and-wheel architecture while offering distinct mounting and shaft arrangement options tailored to different machine layouts.

Technical Specifications — EP-WPX-O Single Speed Reducer Series

Full dimensional data for all 13 frame sizes is listed below. All external measurements in millimeters (mm); oil capacity in liters (L); weight in kilograms (kg). When evaluating a single speed reducer from the dimensional data, note that the E column appears three times in the original drawing (E, E₁, E₂) — representing different face dimensions. On mobile, scroll the table horizontally to view all columns.

Size	Ratio	А	AB	BB	BC	CC	M	N	E	E₁	E₂	G	Z	HS	U	T×V	LS	S	W×Y	Wt (kg)	Oil (L)
40	—	143	87	74	45	40	94	184	70	74	86	10	10	25	12	4×2.5	28	14	5×3	5	0.36
50	—	175	108	97	50	50	116	220	90	93	102	15	12	30	12	4×2.5	40	17	5×3	6	0.50
60	1/5	198	120	112	55	60	126	260	100	105	120	20	12	40	15	5×3	50	22	7×4	10	0.60
70	1/10	231	140	131	65	70	156	295	120	120	135	20	15	40	18	5×3	60	28	7×4	15	1.10
80	1/15	261	160	142	70	80	175	320	140	130	150	20	15	50	22	7×4	65	32	10×4.5	20	1.50
100	1/20	322	190	169	90	100	224	375	190	155	180	26	15	50	25	7×4	75	38	10×4.5	35	4.00
120	1/25	371	219	190	100	120	266	450	220	185	215	30	18	65	30	7×4	85	45	12×4.5	50	5.20
135	1/30	422	249	210	110	135	306	495	260	210	235	30	18	75	35	10×4.5	95	55	16×6	75	7.50
147	1/40	432	256	210	114	147	302	558	250	230	278	32	18	75	35	10×4.5	95	55	16×6	96	8.50
155	1/50	497	295	252	140	155	350	590	290	245	295	35	21	85	40	12×5	110	60	18×7	115	9.30
175	1/60	534	314	255	150	175	394	640	320	267	323	40	21	85	45	14×5.5	110	65	18×7	140	10.5
200	—	580	342	319	175	200	440	710	370	290	360	40	24	95	50	14×5.5	125	70	20×7.5	200	12.7
250	—	705	420	385	200	250	510	860	440	350	440	45	28	110	60	18×7	155	90	25×9	340	23.0

All dimensions in mm. Oil capacity in L. Weight in kg. Custom specifications available on request.

superiortransmissioninc-products-EP-WPX Single Speed Reducer-0.36 to 23 L Oil Capacity-draft

Five Key Advantages of the EP-WPX-O Single Speed Reducer

① Dual-Configuration Flexibility

The WPX and WPO housing variants share the same internal worm drive, giving procurement teams a unified single speed reducer platform that adapts to radically different mounting requirements — dual through-shaft (WPX) or direct-flange output (WPO) — eliminating the need to source a separate transmission single speed reducer family for varying plant layouts.

② Broad Ratio Coverage in One Family

Ratios from 1/5 to 1/60 across a single product series eliminate the need to source from multiple suppliers as torque requirements change between machine variants. This makes the EP-WPX-O the preferred single speed reducer choice for OEMs designing scalable equipment platforms for global markets.

③ Heavy-Duty Size Range

The series extends to a 250 mm frame — covering output torques that most compact reducer families cannot reach — with a 23.0 L oil capacity sized to maintain thermal stability during extended continuous-duty operation. This is a genuine, heavy-duty single speed reducer solution, not simply an upscaled light-duty design.

④ Multiple Input Shaft Orientations

WPX offers three shaft direction variants (A, B, C); WPO extends this with six options (A through F including dual-input configurations). This range of orientation choices lets machine designers fit a single speed gear reducer to virtually any mechanical layout without custom adapters, while ensuring the single speed reducer accommodates demanding spatial constraints.

⑤ Self-Locking at High Ratios

The worm gear geometry at ratios of 1/30 and above provides inherent back-driving resistance, acting as a passive mechanical brake when the drive motor is de-energized. This single speed reducer characteristic is particularly valued in vertical lifting, gate actuation, and load-holding applications where a separate holding brake would otherwise be required.

How the WPX-O Single Speed Reducer Operates

Like all worm-based single reduction worm reducer units, the EP-WPX-O converts rotary motion through a right-angle mesh between a hardened worm shaft and a cast bronze worm wheel. The worm's helical thread engages the wheel's curved tooth profile in a sliding-and-rolling contact that is continuous rather than intermittent, making this single speed reducer preferable over spur or bevel gears in industrial environments that require low-noise, low-vibration performance.

What differentiates the WPX from the standard WPA or WPS configurations is the through-shaft output design: the output shaft passes completely through the housing, with identical keyway and diameter dimensions on both ends. This allows the EP-WPX to simultaneously drive two separate loads — for example, two conveyor belts running in parallel — without the complexity or efficiency losses of a secondary power split gearbox. The WPO configuration instead terminates the output at a precision-machined flange face, allowing the driven equipment to bolt directly to the reducer's output face. This eliminates an entire coupling stage and improves concentricity between the reducer output and the driven component.

In both configurations, the worm gear reduction ratio is determined by the number of worm wheel teeth divided by the worm's lead (number of thread starts). A four-start worm paired with a 60-tooth wheel gives a 1/15 ratio; a single-start worm with a 60-tooth wheel gives 1/60. This mechanical elegance — achieving large speed reductions in a single stage — is why the single speed reducer has remained a fundamental industrial drive component for over a century of continuous development.

Materials & Build Quality

Material specification in a single speed reducer of this size range — particularly units above 100 kg like the WPX/WPO 200 and 250 — demands careful selection across every component. The housing is cast from high-tensile grey iron (HT250 or equivalent), providing the stiffness and damping characteristics required when output torques reach several thousand Newton-metres. For applications involving elevated shock loads — common in mining, quarrying, and heavy press drives in North American and Australian industrial markets — ductile iron housings are available as a factory option on select larger frames.

The worm shaft is manufactured from 20CrMnTi alloy steel, processed through carburizing and case hardening to reach a tooth surface hardness of HRC 58–62, while the core retains adequate toughness for impact resistance. Finish grinding of the worm thread profile ensures the contact pattern across the mesh is uniform and consistent from unit to unit, ensuring every single speed reducer maintains the low noise levels observed during operation. The worm wheel, cast from phosphor bronze (CuSn10P) using a centrifugal casting process, delivers the combination of low friction coefficient, thermal conductivity, and conformability that worm drives rely on for their unique operating characteristics.

Bearings throughout this single speed reducer series are selected from deep groove ball or angular contact types depending on the anticipated axial thrust component at each frame size and ratio. All shafting seals are lip-contact radial shaft seals in FKM or NBR material, rated for continuous duty in ISO VG 220/320 mineral gear oil environments. The oil volume figures in the specification table — from 0.36 L at size 40 up to 23.0 L at size 250 — are calculated to maintain adequate worm submersion at all permitted mounting orientations.

Application Scenarios

The dual-shaft (WPX) and flange-face (WPO) configurations together address a broad cross-section of industrial drive applications. Below are the primary sectors where EP-WPX-O units are deployed as the primary single speed reducer component in the drive chain.

Dual-Drive Conveyor Systems

The WPX through-shaft design is purpose-built for driving two conveyor belts or roller beds from a single motor input. By mounting the WPX centrally between two driven loads, engineers eliminate the need for a secondary power split arrangement — reducing part count, simplifying alignment, and lowering the overall installed cost of the transmission single speed reducer system.

Direct-Mount Driven Equipment (WPO)

Stirrers, agitators, drum drives, and rotating-table indexers frequently use the WPO flange configuration to bolt directly to the single speed reducer housing. The flange eliminates coupling misalignment as a failure mode and shortens the overall axial length of the drive train — critical in compact machine frames used in European and UK pharmaceutical processing equipment.

Mining & Quarrying Feeders

Vibrating feeder drives, apron conveyor drives, and belt-filter press drives in mining operations demand robust single speed reducer performance combined with the shock-load tolerance that a heavy-duty worm drive housing provides. The WPX 200 and 250 sizes with ductile iron housings are frequently specified for these environments in Australian, Canadian, and Brazilian mining projects.

Printing & Laminating Presses

Tension rolls, laminating nip drives, and web-guiding systems in commercial printing require precise, vibration-free output speed. A single speed gear reducer translates a standard motor speed to the web-handling range while ensuring the single speed reducer delivers the smooth torque profile that prevents tension spikes and web breaks in continuous web printing lines.

Water Treatment & Wastewater Equipment

Slow-speed sludge scrapers, clarifier drives, and thickener rakes operate at very low output RPM — often below 5 rpm — demanding ratios of 1/40 to 1/60. The WPO-155 and WPO-175 at these ratios are well-established in wastewater treatment applications across France, the UK, and Southeast Asian municipal infrastructure projects due to their compact housing and reliable sealed-oil lubrication.

Crane & Hoist Auxiliary Drives

Bridge crane travel drives, hoist limit-switch cams, and traverse positioners use the EP-WPX-O single speed reducer for its reliable self-locking capability at high ratios — preventing load back-drive when the motor is unpowered. This passive safety feature is particularly valued in overhead lifting applications subject to crane safety standards in Europe and North America.

About Our Manufacturing Facility

Over more than a decade of dedicated work in mechanical power transmission, our engineering and production teams have accumulated deep domain knowledge across a comprehensive product portfolio, including agricultural gearboxes, our flagship single speed reducer line, planetary gear drives, power take-off shafts, hydraulic cylinders, gears, chains, and motors. We produce all core components under one roof, giving us full process control from raw casting through final assembly and testing.

Our facility operates under ISO 9001:2015 quality management certification. Gear hobbing, heat treatment, precision grinding, and assembly are all performed in-house, allowing our engineers to maintain direct oversight of every single speed reducer we manufacture. By tightly controlling dimensional tolerances, surface finish standards, and material traceability across every batch, we are able to produce standard or non-standard mechanical components for OEM customers worldwide.

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Related Products

Sourcing your single speed reducer and its matched drive components from a single manufacturer eliminates interface specification risk and simplifies warranty management. We supply the following complementary products alongside the EP-WPX-O series.

Electric Motors

Our IEC-frame electric motors are dimensionally matched to the single speed reducer input flanges across all frame sizes. Available in single-phase and three-phase configurations from fractional kW through to the power levels required by WPX-250, they provide a straightforward motor pairing without custom machining. Specifying the motor and reducer together from our facility ensures the input shaft diameter, keyway dimensions, and coupling torque capacity are factory-verified before shipment.

Complete Worm Gearbox Range

The WPX-O sits within a broader worm gearbox portfolio that includes WPA, WPS, WPE, NMRV, and other configurations covering hollow-shaft, flange, and motor-mounted assembly types. If your single speed reducer application demands a different shaft arrangement or a smaller envelope than the WPX-O provides, our full transmission range includes an appropriate match — all manufactured to the same material and tolerance standards, and all available as premium versions with synthetic oil fill for extended service intervals.

Часто задаваемые вопросы

Q1. What is the main difference between the WPX and WPO configurations in a single speed reducer, and which one is better suited for a direct-coupled agitator drive in a UK chemical plant?

The WPX uses a through-shaft output — meaning the output shaft exits both sides of the housing — which is useful for simultaneously powering two loads from one reducer. The WPO uses a flanged output face, so the driven equipment bolts directly to the housing. For a direct-coupled agitator in a UK chemical plant, the WPO is almost always the better choice: it eliminates the intermediate coupling, reduces the overhung load on the agitator bearing, and creates a more compact, hygienic drive arrangement compatible with process industry standards.

Q2. How do I select the correct gear ratio when specifying a single speed reducer for a slow-speed sludge scraper drive in an Australian wastewater treatment facility?

A standard 4-pole, 50 Hz motor runs at approximately 1450 rpm. If your sludge scraper requires an output speed of around 25–30 rpm, a ratio in the 1/50 range (WPO-155) achieves approximately 29 rpm output — typical for clarifier drive speeds in Australian municipal wastewater treatment standards. For outputs below 25 rpm, the 1/60 ratio on the WPO-175 brings output down to approximately 24 rpm. Always confirm the required output torque against the frame's rated capacity before finalizing the selection.

Q3. Where can I find a customized single speed reducer with a modified output bore diameter for a Canadian OEM packaging machine build that uses non-standard shaft sizes?

As a direct manufacturer, we offer customized single speed reducer specifications including modified output bore diameters, extended shaft lengths, altered keyway dimensions, and special surface treatments for corrosive environments. For a Canadian OEM packaging application where non-standard shaft sizing is required, you can submit your shaft diameter, keyway width, and required length to our engineering team along with the torque and ratio requirements, and we will specify the appropriate WPX or WPO frame and output bore modification without additional tooling cost for most standard bore sizes.

Q4. What are the disadvantages of a single reduction worm reducer compared to a helical gearbox when used in a high-duty-cycle Brazilian mining conveyor application?

The primary limitation is mechanical efficiency. A single speed reducer at a 1/30 or higher ratio typically delivers 65–75% mechanical efficiency, versus 95%+ for a comparably rated helical unit. In a high-duty-cycle Brazilian mining conveyor running continuously under heavy load, this efficiency gap translates to a meaningful increase in motor power consumption and heat generation. For continuous-duty, high-power applications the efficiency penalty may favour a helical or bevel-helical alternative. However, where the conveyor is intermittent, where the self-locking characteristic prevents run-back on an inclined flight, or where compactness in a tight machine frame is paramount, the worm drive remains a practical engineering choice.

Q5. How often should the gear oil be changed in a WPO single speed reducer operating in a high-ambient-temperature printing plant in Southeast Asia?

In a Southeast Asian printing environment where ambient temperatures routinely exceed 35°C, the oil oxidation and viscosity breakdown rate is accelerated relative to temperate climate installations. As a practical guideline: perform the initial oil change after 200–300 running hours (the run-in period removes bronze run-in debris), then at 2,000-hour or 12-month intervals thereafter — whichever arrives first. Use ISO VG 220 or VG 320 mineral gear oil; for extended drain intervals a PAO synthetic gear oil rated for worm gearbox service is appropriate. At each drain, check for bronze particles and discoloration, which indicate accelerated worm wheel wear requiring investigation before the next service interval.

Q6. Which frame size of the EP-WPX-O single speed reducer is recommended for a dual-belt conveyor drive system in a French food processing facility running a 1.5 kW motor at 1400 rpm?

When sizing a single speed reducer for a 1.5 kW input at 1400 rpm with a dual-belt output requirement, the WPX-80 or WPX-100 frame is the typical starting point depending on the required output torque and belt speed. At a 1/20 ratio on the WPX-100, the output speed would be approximately 70 rpm — suitable for many food processing conveyor applications. The WPX through-shaft configuration delivers matched torque to both belt drives simultaneously. For French food processing installations requiring food-grade lubricant compliance under EU regulation, we can factory-fill with approved NSF H1-rated gear oil at the customer's request.

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