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WPDA Series Worm Gearboxes
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  • WPDA Series Worm GearboxesWPDA Series Worm Gearboxes

WPDA Series Worm Gearboxes

WPDA Series Worm Gearboxes — 13 frame sizes (40–250), ratios 5:1 to 100:1, output torque 15–2,500 N·m, input power 0.12–15 kW, IP65 cast iron housing with forced lubrication. The worm wheel is quenched and ground to HRC 58–62; a double-lip seal keeps flour dust, field silt and washdown water out of the gear cavity. Foot, flange and hollow-shaft mounting are available, and the output shaft can be machined to match your existing motor. Send your input power, required ratio and motor flange — we return a matched frame, dimensional drawing and factory-direct quote within 24 hours.
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Product Description
4050607080100120135147155175200250

WPDA Series Worm Gearboxes — Ratios 5:1 to 100:1, 15–2,500 N·m, IP65 Cast Iron Housing

If you are sourcing a worm reducer for a mixer, conveyor, packing line or farm implement, the three numbers that decide whether it fits are ratio, output torque and motor flange. The WPDA series covers all three across thirteen frame sizes from 40 to 250, with input power from 0.12 kW to 15 kW and a cast iron housing that holds IP65 under washdown and dust. The tables below let you match a frame to your duty without opening a catalogue.

Specification Snapshot

  • Frame sizes40, 50, 60, 70, 80, 100, 120, 135, 147, 155, 175, 200, 250
  • Input power0.12 kW – 15 kW
  • Reduction ratio5:1, 10:1, 15:1, 20:1, 25:1, 30:1, 40:1, 50:1, 80:1
  • Output torque15 N·m – 2,500 N·m
  • HousingHigh-strength cast iron, impact and deformation resistant
  • Worm wheelQuenched and ground, tooth surface HRC 58–62
  • ProtectionIP65 — double-lip seal plus dustproof skeleton oil seal
  • MountingFoot, flange or hollow shaft; output shaft machined to your motor
  • LubricationForced lubrication circuit, sump below 60 °C at 24/7 duty
WPDA Series Worm Gearboxes — cast iron housing worm reducer
WPDA worm gearbox — cast iron housing, flange-mounted input, hollow or solid output shaft.
WPDA Series Worm Gearboxes — second product view
Second product view — output interface and mounting feet.
WPDA Series Worm Gearboxes — dimension drawing
Dimensional drawing — frame sizes 40 to 250, flange and shaft dimensions.
WPDA Series Worm Gearboxes — application in food processing and mixing equipment
Typical installation — mixing and conveying equipment in food processing.

Where the WPDA Fits

Food Processing & Mixing

Self-locking holds the paddle when the motor stops

A 40:1 ratio on the WPDA-70 lets a large-capacity mixing paddle start under load without stalling. When the line stops, the self-locking worm geometry keeps the paddle from dropping under its own weight. The double-lip seal keeps flour dust out of the oil, so the service interval moves to roughly six months.

Wastewater & Sorting

Cast iron housing and double-lip seal against humidity

In a sewage or garbage-sorting plant, oil leaking past a worn lip seal is what kills bearings. The WPDA-100 uses a rust-proof cast iron housing and a double-lip seal; measured operating noise drops from around 80 dB to 62 dB, which matters on night shifts in residential zones.

Agricultural Machinery

60:1 ratio triples drum torque on a harvester

On a combine threshing drum, a 60:1 WPDA-80 lifts motor torque roughly threefold and improves threshing efficiency by about 25 %. The hollow shaft mounts straight onto the existing drive shaft, so the frame does not need re-machining. IP65 keeps field silt and rain out of the gear cavity.

Logistics & Lifting

Right-angle layout saves 30 % of installation space

On automated sorting lines and lifting platforms, the right-angle worm layout lets the motor sit beside the driven shaft instead of behind it. A 25:1 WPDA-60 gives fine enough positioning for parcel sorting without a servo. Output shafts can be machined to match imported motors, avoiding a full transmission swap. See the WP Series worm gearbox range for lower-ratio duties.

Selection Table — Power, Ratio and Weight

Frame size quick reference — nominal input power and weight
Size Input Power (kW) Ratio Range Weight (kg)
40 0.12 5:1 – 80:1 5
50 0.18 5:1 – 80:1 8
60 0.37 5:1 – 80:1 11
70 0.37 – 0.75 5:1 – 80:1 17
80 0.75 – 1.5 5:1 – 80:1 22
100 1.5 5:1 – 80:1 38
120 2.2 – 3.0 5:1 – 80:1 64
135 3.0 – 4.0 5:1 – 80:1 85
147 3.0 – 4.0 5:1 – 80:1 105
155 5.5 5:1 – 80:1 118
175 5.5 – 7.5 5:1 – 80:1 165
200 11.0 5:1 – 80:1 236
250 11.0 – 15.0 5:1 – 80:1 396

Output torque spans 15 N·m at size 40 to 2,500 N·m at size 250. If your duty needs a ratio outside the nine standard steps, ask for the nearest pair and we will confirm the actual output speed and torque.

Installation Dimensions — Frame Sizes 40 to 250

Mounting dimensions (mm) — A, AB, BB, H, HL, flange LA/LB/LC, input hole Q/U, output shaft LS/S
Size A AB BB H HL M N E F G Z LA LB LC LE LZ Q U T×V LS S W×Y
40 135 75 74 138 40 90 100 70 80 13 10 115 95 140 4 M8 31 11 4×12.8 28 14 5×3
50 151 83 97 176 50 120 140 95 110 15 12 115 95 140 4 M8 31 11 4×12.8 40 17 5×3
60 167 91 112 204 60 130 150 105 120 20 12 130 110 160 4 M8 33 14 5×16.3 50 22 7×4
70 200 109 131 236 70 150 190 115 150 20 15 130 110 180 4 M8 40 14 5×16.3 80 28 7×4
80 225 125 142 268 80 170 220 135 180 20 15 165 130 200 4.5 M10 48 19 6×21.8 65 32 10×4.5
100 280 148 169 336 100 190 270 155 220 25 15 165 130 200 4.5 M10 52 24 8×27.3 75 38 10×45
120 333 181 190 430 120 230 320 180 260 30 18 215 180 250 5 M12 63 28 8×31.3 85 45 12×4.5
135 375 202 210 480 135 250 350 200 290 30 18 215 180 250 5 M12 83 28 8×31.3 95 55 16×6
147 415 235 210 480 123 250 350 200 280 32 18 215 180 250 5 M12 83 28 8×31.3 95 55 16×6
155 448 247 252 531 135 275 390 220 320 35 21 265 230 300 5 M12 83 38 10×41.3 110 60 18×7
175 481 262 255 600 160 310 430 250 350 40 21 265 230 300 5 M12 83 38 10×41.3 110 65 18×7
200 543 285 319 686 175 380 480 290 390 40 24 300 250 350 6 M16 114 42 12×45.3 125 70 20×7.5
250 615 330 385 800 200 460 560 380 480 45 28 300 250 350 6 M16 114 42 12×45.3 155 90 25×9

All dimensions in millimetres. On mobile, swipe the table horizontally to reach the flange and shaft columns. Send your motor frame and required output shaft size and we will confirm the matching row before you order.

Why Buyers Specify This Series

01

Hardened and ground worm wheel, HRC 58–62

The worm wheel goes through quenching and grinding, with a tooth surface hardness in the HRC 58–62 band. In a mining conveyor application, two years of continuous operation produced less than 0.1 mm of gear wear — roughly three times the service life of a standard reducer in the same duty. The precision gear manufacturing page shows the grinding and inspection steps behind that figure.

02

Forced lubrication keeps the sump under 60 °C at 24/7 duty

An internal forced lubrication circuit feeds the mesh and bearings rather than relying on splash alone. At continuous 24-hour operation the oil sump stays below 60 °C, which slows lubricant oxidation and holds the film thickness at the worm contact. That is the difference between a reducer that lasts a season and one that lasts several.

03

IP65 double-lip seal and a housing that does not rust through

A double-lip seal plus a dustproof skeleton oil seal holds IP65 against mud, rain and process dust. On a garbage-sorting site where ordinary reducers leaked oil and seized within three months, a WPDA-100 ran 18 months in the same corrosive environment without a drop of leakage. If your duty is lighter and you need a smaller envelope, compare the RV Series worm gearbox.

04

Output shaft machined to your motor, not the other way round

Foot, flange and hollow-shaft mounting are all available, and the output shaft can be machined to the size of the motor or driven shaft you already own. A farm-machinery plant needed a shaft that matched an older motor; the replacement shaft shipped in three days and bolted on without changing the motor. For agricultural duties, see the agricultural gearbox range as well.

Customer Feedback

“We run these in a humid food workshop where the previous gearboxes rusted and needed frequent shutdowns. With the WPDA series, the housing has not rusted even with flour and moisture around all day, and the bronze worm wheel is still clean. Noise during operation is almost negligible, so it no longer interferes with the food testing equipment nearby. When I needed to adjust the reduction ratio, their team walked me through the model differences and ran the load calculation for me — the recommended unit ran smoothly from the first start.”

Emma Wilson Food Processing Plant, Sydney, Australia

“The WPDA gearboxes worked very well on our project — reliable, efficient, and easy to install and maintain. From the first consultation to delivery everything went smoothly, and communication was straightforward. We will keep working together and recommend the product to other partners.”

James Carter Project Buyer, Raydafon customer

Send Your Motor Power and Ratio — Get a Matched Frame

Tell us input power, required output speed or ratio, mounting type and shaft size. We will confirm the WPDA frame, return the dimensional drawing and quote at factory price, usually within 24 hours. Full range on the worm gearbox page.

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For inquiries about hydraulic cylinders, gearboxes, PTO shafts or price list, please leave your email to us and we will be in touch within 24 hours.
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