RW Series
RW Series Worm Gearboxes
Compact right-angle reduction with high ratios in a single stage.
Aluminium-bodied worm reduction gearboxes for right-angle drives where space is tight and reduction is high. Hardened and ground worm shaft running against a centrifugally cast bronze wheel, with a self-locking characteristic at higher ratios.
- Power range
- 0.18 kW to 15 kW
- Ratio range
- 7.5:1 up to 100:1
- Frame sizes
- RW30 to RW150
- Mounting
- Universal
Built for Duty
What separates RW Series from a general-purpose drive.
Hardened and ground worm
Case-hardened alloy steel worm ground after heat treatment for a consistent contact pattern and quiet running.
Centrifugally cast bronze wheel
Dense, pore-free bronze rim on a cast iron hub carries shock load and beds in without pitting.
Pressure die-cast housing
Ribbed aluminium body dissipates heat and keeps the unit light enough to mount directly on the driven machine.
Universal mounting
Machined feet, output flange and hollow or solid shaft on a single housing — one unit covers most layouts.
Self-locking at high ratio
Ratios above 40:1 resist back-driving, useful on hoists, gates and conveyors that must hold position.
Sealed for life options
Synthetic-filled variants for wash-down and low-maintenance duty where oil changes are impractical.
Selection data
Technical Specifications
RW Series — frame size against output shaft, power and ratio
| Model | Output shaft | Power range | Ratio range |
|---|---|---|---|
| RW 30 | 14 mm | 0.18 kW | 7.5:1 to 100:1 |
| RW 40 | 18 mm | 0.18 / 0.37 kW | 7.5:1 to 100:1 |
| RW 50 | 25 mm | 0.18 / 0.37 / 0.75 kW | 7.5:1 to 100:1 |
| RW 63 | 25 mm | 0.37 / 0.75 / 1.1 kW | 7.5:1 to 100:1 |
| RW 75 | 28 mm | 0.75 / 1.1 / 2.2 kW | 7.5:1 to 100:1 |
| RW 90 | 35 mm | 1.1 / 1.5 / 2.2 / 3.7 kW | 7.5:1 to 100:1 |
| RW 110 | 42 mm | 1.1 / 1.5 / 2.2 / 3.7 / 5.5 kW | 7.5:1 to 100:1 |
| RW 130 | 45 mm | 1.5 / 2.2 / 3.7 / 5.5 / 7.4 kW | 7.5:1 to 100:1 |
| RW 150 | 50 mm | 2.2 / 3.7 / 5.5 / 7.4 / 11 / 15 kW | 7.5:1 to 100:1 |
Figures are for selection guidance. Confirm the final rating against the service factor for your duty cycle — send us the application and we will do it with you.
Where the RW Series Runs
- Belt and screw conveyors
- Packaging and bottling lines
- Flour and dal mills
- Roller shutters and gates
- Agitators and stirrers
- Textile machinery
Also consider
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Quote the RW Series
Send the power, input speed, required output speed and the driven machine. We will confirm the frame, ratio and mounting, and price it.