Nexen Precision Ring Drive

The Nexen Precision Ring Drive (PRD) is designed to provide precision motion control for indexing and rotary positioning systems. By merging Nexen’s Roller Pinion System technology with a precision-grade bearing and gearhead, the PRD provides high performance for indexing and rotary positioning applications.

With accelerations twice as high as similar indexing technologies, it can reach speeds up to 300 rpm; and unlike traditional cam-driven systems, the PRD can also handle peak torque inputs at all times. It offers indexing precision up to ±11 arcseconds with repeatability up to ±1.2 arcseconds. Supported by a high-capacity cross-roller bearing, it is rated for loads up to 1575 kN.

Containing a roller pinion system that is 99% efficient and a gearbox that performs at a 96% efficiency, the PRD meets current industry demands for higher performance capacities at lower energy costs. Its construction also provides continuously smooth motion, minimising vibration during operation and resulting in less noise than conventional technologies.

The elimination of oil baths allows the PRD to reduce labour and maintenance by not requiring time-consuming clean-ups, and enables the drive to be mounted in any orientation. Cabling can be filtered through the large open centre, simplifying installation and improving mounting versatility.