June 25, 2014 - Harmonic Drive announced CHA lightweight Hollow Shaft Servo Actuators. Used in industrial applications where high accuracy, high torque and low weight are essential, the new CHA-14 and CHA-17 actuators go one step further by introducing a central hollow shaft. This aids original equipment manufacturers (OEMs) in minimising complexity in varied industrial applications such as offshore oil and gas, broadcast, automation and robotics. The CHA-Series feature a versatile hollow shaft that makes it easy to pass power supply cables, shafts or laser beams directly through the servo actuator. OEMs can now simplify application designs and ultimately save considerably on development costs and assembly time.
The actuators target the increasing demand by the industry for more compact, powerful and cost effective machine tools. In conjunction with the integrated hollow shaft, robustness is maximised by using high capacity tilt resistant output bearings to allow direct mounting of the load. Using pre-stressed, zero backlash, four-point bearings as flange bearings allows them to be directly assembled onto the machine housing. The resultant structure guarantees the best parallelism, perpendicularity and coaxiality of the actuator to the machine housing.
In addition to the hollow shaft, key performance traits include IP65 ingress protection from dust and jets of water, increased continuous torque, the inclusion of a multi-turn absolute encoder and a resolver for use in harsh and extreme environments. The range also includes optional integrated holding brake and air-purge connection.
