Why Choose the Helical Spline Design?

How Does the Helical Spline Technology Work?

Helical spline actuators function with a piston and a helix, or sliding spline, which work together to convert the linear motion of the piston into rotational motion. Composed of two moving parts and some form of housing, the sliding helical gear concept within the actuator is used in many applications where a rotary movement is required. The actuator functions when the piston is axially displaced using hydraulic pressure causing simultaneous rotation of the piston. Common rotations include 90°, 180°, and 360°; but are available generally up to 720° or more. Additional rotation is created by making the spline gears longer while maintaining the same diameter.

Main Benefits of Helical Spline Actuators:

• Compact and Simple Design

The primary benefit of helical spline actuators is its compact design. These actuators typically build smaller and lighter than other designs, such as a traditional rack and pinion or hydraulic cylinders with linkages.

• Reduced Maintenance and Long Service Life

Helical actuators are completely submerged in oil enabling smooth, low maintenance operation, as well as a longer service life. Comparatively, rack and pinion actuators are only partly submerged with oil and the middle of the device runs dry. This means that the actuator needs consistent lubrication and maintenance to prevent heavy wear and tear of the device.

• Less Risk of Contamination, especially in Harsh Conditions

Helical spline actuators are completely self-contained in its housing. Having external protection could be vital for the operation and performance of the device if the actuator is in conditions where dust and debris could easily invade the device. For example, actuators and cylinders are typically used in mining applications to control precise movements of the drill rig arm. Using a helical spline actuator over a cylinder with a linkage would be more effective, as there is significantly less risk of contamination.