Description
WPO Vertical Mount Single Speed Worm Gear Reducer — Multi-Direction Installation for Space-Constrained Drive Systems
In modern machinery design, drive layout flexibility is as important as raw torque capacity. When floor space is limited, when a conveyor must turn a corner, or when a machine structure demands the gearbox mount at an unusual angle, the standard foot-mounted gearbox cannot always accommodate. The WPO vertical mount worm gear reducer is engineered specifically for versatile, multi-direction installation — providing up to six mounting configurations (A through F) that allow the same unit to be positioned horizontally, vertically, or at intermediate orientations to suit the machine architecture.
Built on the same precision worm-and-wheel technology as the WPA series, the WPO delivers the same high-torque, smooth, low-noise speed reduction in 13 frame sizes (40–250 mm) with ratios from 1/5 to 1/60. It is the go-to solution for agricultural machinery, construction equipment, material handling, and any application where the drive layout demands adaptability. Learn more about our capabilities on the Ever-power company page, or contact us for a layout consultation.
Technical Specifications
WPO shares the same dimensional envelope as the WPX, with shaft-direction options configured for multi-orientation mounting (A–F). Reference input speed 1500 r/min. All dimensions in mm.
| Size | Ratio | A | AB | BB | BC | CC | M | N | E | E₁ | E₂ | G | Z | HS | U | T×V | LS | S | W×Y | Wt(kg) | Oil(L) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 40 | 1/5–1/60 | 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 | 198 | 120 | 112 | 55 | 60 | 126 | 260 | 100 | 105 | 120 | 20 | 12 | 40 | 15 | 5×3 | 50 | 22 | 7×4 | 10 | 0.60 | |
| 70 | 231 | 140 | 131 | 65 | 70 | 156 | 295 | 120 | 130 | 150 | 20 | 15 | 40 | 18 | 5×3 | 60 | 28 | 7×4 | 15 | 1.10 | |
| 80 | 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 | 322 | 190 | 169 | 100 | 100 | 200 | 375 | 190 | 180 | 26 | 26 | 15 | 50 | 25 | 7×4 | 75 | 38 | 10×4.5 | 35 | 4.00 | |
| 120 | 371 | 219 | 190 | 100 | 120 | 210 | 450 | 220 | 185 | 215 | 30 | 18 | 65 | 30 | 7×4 | 85 | 45 | 12×4.5 | 50 | 5.20 | |
| 135 | 422 | 249 | 190 | 100 | 135 | 220 | 450 | 230 | 210 | 235 | 30 | 18 | 65 | 30 | 7×4 | 85 | 45 | 12×4.5 | 50 | 5.20 | |
| 147 | 432 | 256 | 210 | 114 | 147 | 302 | 558 | 250 | 250 | 230 | 32 | 18 | 75 | 35 | 10×4.5 | 95 | 55 | 16×6 | 96 | 8.50 | |
| 155 | 497 | 295 | 252 | 140 | 155 | 350 | 590 | 290 | 245 | 295 | 35 | 21 | 85 | 40 | 12×5 | 110 | 60 | 18×7 | 115 | 9.30 | |
| 175 | 534 | 314 | 255 | 155 | 175 | 394 | 640 | 320 | 287 | 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 |
* E, E₁, E₂ = output shaft dimensional data. Shaft direction positions A–F available for WPO (six orientations vs three for WPX). Lubrication oil fill level must be adjusted for non-horizontal mounting.
Product Structure — Multi-Direction Mounting Design
The WPO housing uses the same precision-cast FC25 grey iron body as the WPX, but the output shaft bearing arrangement is reinforced to handle the additional radial loads associated with vertical and inclined mounting configurations. Oil fill plugs are located on multiple housing faces, ensuring adequate lubrication regardless of mounting orientation.
| Housing | FC25 grey cast iron; oil plugs on multiple faces for multi-orientation mounting |
| Shaft Directions | Up to 6 configurations: A, B, C, D, E, F — horizontal, vertical, and intermediate |
| Output Shaft | Single solid shaft; dual output (WPX) not available on WPO |
| Bearings | Reinforced output shaft bearings for vertical/inclined load vectors |
| Lubrication | Splash oil bath; fill level adjusted per mounting orientation per installation guide |
| Worm Pair | 20CrMnTi worm (≥58 HRC) + ZCuSn10Pb1 bronze wheel — same as WPA/WPS |
✅ Key Features & Benefits
Six Mounting Orientations
Up to six configurable shaft-direction positions (A–F) allow the WPO to be installed horizontally, vertically, with the output shaft pointing upward or downward, or at intermediate angles — the broadest mounting flexibility in the WP series. Keywords: multi-direction mount worm gearbox, vertical worm reducer.
Space-Efficient Drive Solutions
The ability to orient the gearbox vertically reduces the horizontal footprint of a drive system by up to 60% compared to horizontal foot-mounted alternatives — critical in compact machines, lift systems, and multi-level conveyor layouts with limited floor space.
Rugged Cast Iron Housing
FC25 grey cast iron body with reinforced output shaft bearing bores handles the additional combined radial and axial loads inherent in vertical and inclined drive configurations, ensuring long bearing life even under sustained cantilever loading.
Precision Worm & Wheel for Smooth Drive
Ground 20CrMnTi worm and ZCuSn10Pb1 bronze wheel deliver smooth, quiet (≤72 dB(A)) speed reduction with efficiency of 60–90% per ratio. Inherent self-locking at ratios ≥1/30 provides a passive safety feature for vertical lifting applications.
Multi-Position Lubrication System
Oil fill and drain plugs are located on multiple housing faces, ensuring the oil level is correct regardless of mounting orientation. This design detail — absent in many competitor products — is essential for maintaining adequate lubrication in vertical and inclined installations.
Full Size & Ratio Range
13 frame sizes (40–250 mm) and 9 ratios (1/5–1/60) provide the widest possible application coverage for the WPO, from light-duty agricultural equipment to heavy construction machinery auxiliary drives.
Industry Applications
The WPO multi-direction worm reducer is specified wherever standard horizontal foot-mounting is not possible or practical:
Agricultural MachineryGate openers, irrigation pump drives, feed conveyor drives, and harvester auxiliary systems where the drive must accommodate unusual mounting angles in the field environment.
Construction EquipmentConcrete mixer drives, gate hoist drives, and scaffold material hoists benefiting from the WPO’s vertical mounting capability and self-locking torque-hold feature.
Gate & Door AutomationCommercial and industrial gate, door, and barrier systems where the drive must be mounted vertically within the gate post structure with minimum footprint.
Lifting & Hoisting EquipmentLight-duty goods lifts, scissor lift table drives, and platform elevators using the WPO’s self-locking worm gearing (≥1/30) as a passive load-holding device.
Marine & Offshore EquipmentDeck winch auxiliaries, hatch cover drives, and hydraulic ram auxiliary drives on vessels and offshore platforms where space constraints require vertical or inclined gearbox mounting.
Greenhouse & Irrigation SystemsAutomated vent opening mechanisms, irrigation pivot drives, and sorting conveyor systems in agricultural production facilities requiring compact, multi-angle drive solutions.
Quality Control & Certification
ISO 9001:2015 & CE
Full ISO 9001:2015 QMS with CE Declaration of Conformity per shipment. Suitable for EU and Australian market entry. The WPO’s multi-position oil-fill design is verified per the EN ISO 12100 machinery safety standard.
Multi-Orientation Testing
WPO units are run-tested in both horizontal and vertical orientations to confirm adequate oil film formation and bearing lubrication in all specified mounting positions. Oil-seal leakage is verified in each orientation before shipment.
Material Standards
Housing: FC25 cast iron (≥250 MPa). Worm: 20CrMnTi (≥58 HRC). Wheel: ZCuSn10Pb1 tin-bronze. All materials comply with GB/T standards; third-party inspection available on request.
Why Choose Ever-power for WPO Gearboxes
We supply WPO multi-direction worm gearboxes to agricultural equipment OEMs, construction machinery builders, and marine equipment manufacturers across Italy, Canada, Saudi Arabia, Australia, and beyond. Our experienced team can specify the correct mounting position and verify the oil-fill level for any non-standard installation.
- ✅ Multi-orientation application expertise — we specify oil fill positions for every mounting angle
- ✅ OEM catalogue part supply — consistent dimensional supply for agricultural and construction OEMs
- ✅ 20+ years export experience to Oceania, Europe, Middle East, and the Americas
- ✅ CE and ISO documentation supplied as standard with every international shipment
- ✅ Rapid prototyping for custom shaft configurations — drawings approved within 48 hours
⭐ Customer Reviews
“We specify WPO gearboxes on our automated irrigation gate systems. The multi-direction mounting means we can fit them vertically inside the gate post housing without any adapter brackets. Reliable performance in harsh outdoor conditions for over two seasons.”
David R., Agricultural Machinery OEM
Agricultural Machinery OEM, Queensland, Australia
“We use WPO-120 units on our compact concrete mixer drives. The ability to mount them vertically reduced our machine height by 150 mm — a significant benefit for compliance with road transport regulations in Italy. Build quality is excellent.”
Marco F., Construction Equipment Engineer
Construction Equipment Manufacturer, Milan, Italy
“The WPO series solved our layout problem on a multi-level conveyor system where we needed the gearbox mounted at 45 degrees. Ever-power’s team confirmed the correct oil fill level for our mounting angle before we placed the order. Exactly what we needed.”
Trevor B., Plant Engineer
Material Handling Systems, Ontario, Canada
“Ordered WPO-100 gearboxes for irrigation pump drives in a desert agricultural project. The units perform well in 45°C+ ambient temperature. Self-locking at 1/40 ratio is useful for our pump positioning requirements. Good value and responsive service.”
Abdullah K., Procurement Manager
Industrial Equipment Supplier, Riyadh, Saudi Arabia
❓ Frequently Asked Questions
How many mounting orientations does the WPO support?
The WPO supports up to six shaft-direction configurations (A–F), covering horizontal foot-mount, vertical with output shaft up, vertical with output shaft down, and intermediate angles. This contrasts with the WPA (5 positions) and WPX (3 positions), making the WPO the most flexible product in the WP series for non-standard drive layouts.
Do I need to change the oil fill level when mounting the WPO vertically?
Yes — this is critical. The correct oil fill level must be re-established based on the actual mounting orientation. The WPO housing has oil-fill and drain plugs on multiple faces precisely for this purpose. We provide mounting-position-specific oil-fill instructions with every unit. Failure to adjust the oil level can result in inadequate worm gear lubrication in vertical configurations.
Can the WPO be used as a self-locking load-holding device for lifting applications?
At ratios of 1/30 and above, the WPO worm gearing exhibits self-locking behaviour that resists back-driving under static load conditions. This can provide a passive load-holding function for light lifting applications. However, for safety-critical hoisting, the self-locking property must not be relied upon as the sole safety device — always incorporate a dedicated mechanical brake per applicable safety standards.
What is the difference between the WPO and the WPA in terms of performance?
The WPO and WPA deliver identical torque and power performance for equivalent frame sizes and ratios — both use the same worm pair geometry. The WPO differs only in its wider housing (to accommodate more shaft-direction positions) and the inclusion of multi-face oil plugs. The weight and oil volume are slightly higher for the WPO due to the wider body.
What is the maximum input shaft speed for the WPO gearbox?
The recommended input shaft speed range is 600–1,600 r/min. Operation at higher speeds (up to 1,800 r/min) is possible for limited periods but increases oil temperature and reduces efficiency, particularly at high reduction ratios. The reference power and torque data in the catalogue is given at 1,500 r/min — our engineers can provide de-rated values for other input speeds on request.
Flexible Drive Solutions — Contact Ever-power Today
If your machine layout requires a gearbox that installs in a non-standard orientation, the WPO is the answer. Our engineering team will confirm the correct shaft-direction configuration and oil-fill specification for your exact mounting angle.
