Direct Drive Motor Performance in a Compact Size

Harmonic Drive LLC offers the SHA-CG series of high torque, hollow shaft servo actuators. The SHA-CG is designed to provide enhanced rotary positioning accuracy and an output flange with a surface run-out of less than 10 microns.

"The SHA-CG actuators feature a compact, hollow shaft configuration for design versatility in demanding applications," said a company spokesperson. "Designed for machine tool applications, the SHA series of brushless actuators provide high torque for fast acceleration and positioning."

SHA-CG actuators are composed of a Harmonic Drive CSG zero-backlash gear combined with a brushless servomotor with an encoder resolution at the output up to 20,971,520 pulse/rev. The actuators are also available with an optional brake. Positional accuracy better than 1 arc-min and repeatability better than +/-5 arc-sec is achieved while delivering up to 3,400 Nm of torque. A cross-roller bearing allows mounting of large loads directly to the actuator without the need for additional support.

"The SHA-CG has a torque to weight ratio as much as eight times greater than comparable housed direct drive motors, and a torque to volume ratio as much as six times greater," said the spokesperson. "This allows for a more compact and light-weight machine design."

According to the company, SHA-CG specifications include:

• High accuracy: zero-backlash Harmonic Drive gear reducer
• Hollow shaft diameter: 17-45 mm
• Available in four sizes, 20, 25, 32, 40
• Maximum speed up to 120 RPM
• Design: compact, flat, hollow shaft.

For more information contact:

Harmonic Drive LLC

247 Lynnfield Street

Peabody, MA 01960-4905

978-532-1800

www.harmonicdrive.net