WPO Industrial Worm Gearbox
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WPO Upward Output Worm Gearbox Selection Guide
The WPO configuration places the output connection above the reducer centerline while keeping a horizontal input arrangement. It is intended for layouts where the driven shaft, coupling, sprocket, or machine connection is positioned above the gearbox.
Where WPO Fits Best
- Machines with the driven shaft located above the reducer.
- Conveyor or transfer equipment connected at an upper level.
- Mixer or agitator layouts where the machine input is above a floor-level gearbox.
- Replacement projects that must retain an existing upward-output arrangement.
WPO Installation Checks
- Confirm there is enough clearance above the gearbox for the shaft connection and guard.
- Match the output shaft center height to the driven equipment.
- Check the mounting surface, fixing-hole positions, and available service space.
- Verify coupling, sprocket, pulley, or other connecting-part dimensions.
- Allow access for inspection, lubrication, and routine maintenance.
When WPO May Not Be the Right Choice
If the driven connection sits below the reducer, compare the WPX downward-output model. WPO should also be reconsidered when upper clearance is restricted or the installation cannot be matched to an approved dimensional drawing.
WPO Selection FAQ
What is the main layout feature of WPO?
WPO is selected for an upward-output arrangement with a horizontal input.
When should I compare WPO with WPX?
Compare them whenever output direction affects shaft alignment: WPO is the upward-output option, while WPX is the downward-output option.
Which dimensions should be checked before ordering?
Confirm the selected size, shaft center height, mounting-hole pattern, shaft dimensions, connection clearance, and interface with the driven machine.
What information should I send for selection support?
Send the application, required output direction, input and output speed, load condition, operating schedule, mounting space, and any existing drawing or nameplate details.
Browse the WP worm gearbox range or contact ZPGear for model selection support. Final dimensions and installation interfaces must be confirmed against the approved manufacturer drawing before purchase or fabrication.
WPO Model Technical Information
The WPO series worm gear reducer features a horizontal gearbox with a versatile output shaft oriented upwards. This robust design is engineered for applications requiring power transmission in a vertical direction from a horizontal input, making it an excellent choice for conveyors, mixers, and other industrial machinery.
Dimension Parameter List
Mobile: tap cards to expand. Desktop: scroll the full table.
| Size | Ratio | A | AB | BB | BC | CC | M | N | E | E₁ | G | Z | Input shaft | Output shaft | Weight (kg) | (L) | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| HS | U | T×V | LS | S | W×Y | |||||||||||||||
| 40 | 1/10–1/60 | 143 | 87 | 74 | 45 | 40 | 94 | 184 | 70 | 74 | 86 | 10 | 25 | 12 | 4×2.5 | 28 | 14 | 5×3 | 5 | 0.36 |
| 50 | 1/10–1/60 | 175 | 107 | 97 | 50 | 50 | 116 | 220 | 90 | 93 | 102 | 15 | 30 | 12 | 4×2.5 | 40 | 17 | 5×3 | 6 | 0.50 |
| 60 | 1/10–1/60 | 198 | 122 | 112 | 55 | 60 | 126 | 260 | 100 | 105 | 120 | 20 | 40 | 15 | 5×3 | 50 | 22 | 6×3.5 | 10 | 0.60 |
| 70 | 1/10–1/60 | 231 | 140 | 131 | 65 | 70 | 156 | 295 | 120 | 120 | 135 | 20 | 40 | 18 | 6×3.5 | 60 | 28 | 8×4 | 15 | 1.10 |
| 80 | 1/10–1/60 | 261 | 160 | 142 | 70 | 80 | 175 | 320 | 140 | 130 | 150 | 20 | 50 | 22 | 6×3.5 | 65 | 32 | 10×5 | 20 | 1.50 |
| 100 | 1/10–1/60 | 322 | 190 | 169 | 90 | 100 | 224 | 375 | 190 | 155 | 180 | 26 | 50 | 25 | 8×4 | 75 | 38 | 10×5 | 35 | 4.00 |
| 120 | 1/10–1/60 | 381 | 229 | 190 | 100 | 120 | 266 | 450 | 220 | 185 | 215 | 30 | 65 | 30 | 8×4 | 85 | 45 | 14×5.5 | 50 | 5.20 |
| 135 | 1/10–1/60 | 433 | 260 | 210 | 110 | 135 | 306 | 495 | 260 | 210 | 235 | 30 | 75 | 35 | 10×5 | 95 | 55 | 16×6 | 75 | 7.50 |
| 147 | 1/10–1/60 | 439 | 264 | 212 | 113 | 147 | 310 | 556 | 250 | 254 | 254 | 32 | 80 | 35 | 10×5 | 95 | 55 | 16×6 | 90 | 8.50 |
| 155 | 1/10–1/60 | 504 | 302 | 252 | 140 | 155 | 350 | 590 | 290 | 245 | 295 | 35 | 85 | 40 | 12×5 | 110 | 60 | 18×7 | 115 | 9.30 |
| 175 | 1/10–1/60 | 545 | 325 | 262 | 150 | 175 | 394 | 640 | 320 | 267 | 323 | 40 | 85 | 45 | 14×5.5 | 110 | 65 | 18×7 | 140 | 10.5 |
| 200 | 1/10–1/60 | 587 | 350 | 305 | 175 | 200 | 440 | 710 | 370 | 290 | 360 | 40 | 95 | 50 | 14×5.5 | 125 | 70 | 20×7.5 | 200 | 12.7 |
| 250 | — | 705 | 420 | 360 | 200 | 250 | 510 | 860 | 440 | 350 | 440 | 45 | 110 | 60 | 18×7 | 155 | 90 | 25×9 | 340 | 23.0 |
WPO and WPX Installation Orientation Guide
Current model focus: WPO is the orientation to review when the driven connection is above the reducer. Confirm the final shaft center height, mounting surface and clearance against the approved drawing.
WPO: upward output path
Review WPO when the driven shaft and available machine space are above the gearbox.
WPX: downward output path
Review WPX when the driven shaft and support arrangement are below the gearbox.
Need the opposite orientation? Compare the WPX worm gearbox.
Project data to verify before selection
- Operating requirement: input speed, required output speed or ratio, duty cycle and driven load.
- Mechanical interface: mounting position, shaft direction, center height, shaft dimensions, keyway and available clearance.
- Site conditions: ambient environment, access for guarding and maintenance, and the installation arrangement.
Final verification: use the approved ZPGear or manufacturer drawing and the project specification as the source of truth. Ask ZPGear to confirm the selection when load or installation data is uncertain.
Engineering Data and Selection Verification
Use the information on this WPO Industrial Worm Gearbox page for preliminary comparison. Final dimensions, materials, interfaces and operating limits must be confirmed against the current manufacturer catalog or an approved project drawing before purchase, fabrication or installation.
Table scope: each parameter row applies only to the model or size identified in that row. Do not interpolate, combine or transfer values between sizes without manufacturer confirmation.
Required Project Inputs
- Input speed and motor information
- Required output speed or target ratio
- Driven load type, start-stop pattern and operating schedule
- Mounting position, shaft direction and available installation space
- Site environment and maintenance-access requirements
Interfaces to Confirm
- Model size and mounting-hole pattern
- Input and output shaft or bore dimensions
- Flange, keyway, coupling and guarding arrangement
- Shaft center position and surrounding clearance
- Lubrication and inspection access
Reproducible Speed and Ratio Check
Required ratio: input speed ÷ target output speed. Expected output speed: input speed ÷ selected ratio. Record the source of each input value and use consistent units.
This arithmetic check does not confirm torque, power, service factor, temperature, efficiency or life. Ask ZPGear to verify those items from the current manufacturer data for the selected model and operating condition.
Source record: keep the manufacturer name, catalog or drawing number, revision date, selected model size, project inputs and final approval sheet with the order documentation. Send the project information to ZPGear for confirmation.