Feature

Enhanced frameless motors match demanding machine tool spindle applications

Parker has enhanced the design of its SKW high-speed frameless servomotor series. Suitable for single and multi-spindle machine tool applications up to 21kW, the motor deploys inside the spindle and is supplied in kit form.

15/03/2015 11:03:37

The revised SKW range features the use of cold PMAC (permanent magnet ac) technology. This means reduced heating in the bearings – so low dilation effect. In addition, an increased internal diameter means greater rigidity and capacity for bar stock handling in automatic (sliding head) lathes.

Despite the increase in internal diameter, the overall dimensions remain extremely compact. Multi-spindle machine tools, in particular, need motors with a small external diameter and a large hollow shaft for the bar or the tools (thus delivering greater productivity). For this reason, the SKW series has been designed as a tubular motor.

SKW motors deliver high efficiency (90-95 percent) and are liquid cooled to optimise performance. Offering a speed range up to 12,000 rpm, the motors come in four sizes (with four lengths by size). Choices include constant power from 3 to 28kW and low speed torque from 4 to 37Nm, with specific speed/torque requirements available on request.

Written By Sophia Bell

Sophia Bell is the Group Editor of DPA, Connectivity, and PBSI. She joined the team in 2020 as Assistant Editor after achieving a First-Class Honours BA in English Literature and Film Studies from the University of East Anglia. In her current role, she leads the editorial strategy, driving digital growth and ensuring each title continues to deliver trusted, relevant insight for engineering and manufacturing professionals.