RK Series
RK Series Heli-Bevel Gearboxes
Right-angle drive at helical efficiency and helical torque.
Helical-bevel gearboxes combining a spiral bevel stage with helical stages. They turn the drive through 90 degrees without the efficiency loss of a worm set, which is what makes them the choice for high-torque, continuously running right-angle drives.
- Power range
- 1.5 kW to 22 kW
- Ratio range
- 10:1 up to 150:1
- Efficiency
- Up to 96 percent
- Drive angle
- 90 degrees
Built for Duty
What separates RK Series from a general-purpose drive.
Spiral bevel input stage
Lapped spiral bevel pair carries the turn with progressive tooth engagement and low noise.
Efficiency of a helical drive
Around 96 percent against roughly 70 percent for a high-ratio worm — a direct saving on connected load.
High torque density
More torque per unit of housing size than a worm box at the same centre distance.
Hollow shaft and shrink disc
Mount straight onto the driven shaft with a shrink disc or key, removing the base frame entirely.
Six mounting positions
Machined on multiple faces so the same unit suits the layout, not the other way round.
Heavy-duty sealing
Twin-lip seals and optional drywell for agitator and outdoor duty.
Selection data
Technical Specifications
RK Series — model against power range
| Model | Power Range (kW) |
|---|---|
| RK 47 | 1.5 |
| RK 57 | 1.5 |
| RK 67 | 1.5 / 2.2 / 3.7 |
| RK 77 | 1.5 / 2.2 / 3.7 |
| RK 87 | 2.2 / 3.7 / 5.5 |
| RK 97 | 2.2 to 7.4 |
| RK 107 | 5.5 to 15 |
| RK 127 | 11 to 22 |
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 RK Series Runs
- Cranes and hoists
- Line polishing machine
- Conveyors and elevators
Also consider
Related Products
Quote the RK Series
Send the power, input speed, required output speed and the driven machine. We will confirm the frame, ratio and mounting, and price it.