Bevel helical gearboxes · STM Polska
WSKA bevel helical gearboxes
WSKA is a bevel helical gearbox: bevel stages working together with helical stages to change the direction the torque is transmitted, most often through 90 degrees. It is the unit to specify when the motor cannot sit in line with the driven shaft, and it packages the whole drive compactly while keeping efficiency high.
The gearing is designed for continuous duty and resists wear, so the parameters you size against are the parameters you still have several years in. Efficiency holds up in both directions of rotation and across a wide range of input speeds. That makes this right-angle helical unit a sound replacement where an older, less efficient drive is costing energy and causing stoppages.
Sizing starts with the output speed, the torque and the type of load. Match the ratio to the motor speed and the machine so the gearbox works in its proper range with a safety margin left. Drives with a high number of starts, or with frequent changes of direction, need a version with higher load capacity, and on those it is worth checking efficiency across the whole speed range rather than at one point.
Then decide how the unit sits in the machine. WSKA gearboxes are often fitted as the right-angle element in conveyors and transport systems, so shaft orientation, the free space around the unit and the way torque carries on to the next part of the installation all matter. Radial and axial loads set both the size of the gearbox and the permitted shaft loads.
Temperature, humidity, dust and vibration come last but decide the detail. The gearing copes with hard conditions, and the right specification or added protection extends life further. Typical duties are conveyors, transport systems, process lines, mixers, packing lines and any drive that has to change direction of rotation. Send us the data and we size it, then quote within one working day.
Main features
Bevel and helical stages in one housing
Changes drive direction, most often through 90 degrees
Efficiency held across a wide input speed range
Same efficiency in both directions of rotation
Gearing resists wear and is designed for continuous duty
Compact drive package for angled installations
Specifications
- Drive angle
- 90 degrees, typical
| Gearing | Bevel stages working with helical stages |
|---|---|
| Direction change | Most often through 90 degrees |
| Efficiency | Held in both directions and over a wide input speed range |
| Wear | Gearing designed for continuous duty |
| Sizing inputs | Output speed, torque, load type, radial and axial loads |
Applications
- Conveyors
- Transport systems
- Process and production lines
- Drives needing a change of direction of rotation
- Mixers
- Packing lines
Documentation
Catalogue, ratio tables and dimensional drawings for the WSKA series are sent with every quotation. Request the documentation.
Questions about the WSKA series
When do I need a right-angle gearbox rather than an inline one?
When the motor cannot sit in line with the driven shaft, or when the drive has to be packaged into a corner of the machine. WSKA gearboxes combine bevel and helical stages to turn the torque, usually through 90 degrees, which lets you keep the motor out of the way without losing efficiency.
Does efficiency drop when the drive runs in reverse?
No. WSKA units hold their efficiency in both directions of rotation and across a wide range of input speeds. That matters on reversing duties and on drives fed by an inverter, where the input speed is not fixed. On drives with frequent reversals we also specify a version with higher load capacity.
Which ratio do I need for a conveyor?
Work from the belt speed you need at the drum, back through the drum diameter to an output speed, then match the ratio to the speed of the motor you intend to use. We then check torque, including the starting condition, and leave a safety margin. Send us the figures and we confirm the size and the ratio.
What else affects the size I need?
Radial and axial loads on the output shaft, the number of starts, and whether the load is constant or varying. Mounting matters too: shaft orientation, the space available and how torque is passed to the next element. Temperature, humidity, dust and vibration decide any extra protection, and that decision belongs at the sizing stage.
Related series
Bevel helical gearboxes
OMP and OMF bevel helical gearboxes
OMP and OMF bevel helical gearboxes: two and three stage, one-piece cast housing, with backstop, shrink disc and taper bush options. Quoted in one day.
Discover
Request a quotation
Quote for wska bevel helical gearboxes
Reply within one working day with a price, a lead time and the datasheet.
What lets us quote first time
- Ratio
- Output torque
- Hollow or solid shaft
- Mounting