Exlar PRS and PRR planetary roller screws

Exlar’s component planetary roller screw line has been expanded to include two performance capacities, available in PRS and PRR models. The PRS models, with G5 lead accuracy, are available in screw diameters ranging from 8-80 mm and deliver static load ratings up to 970 kN. Exlar’s PRR models, with G9 lead accuracy, are available in screw diameters of 12 to 27 mm and offer static loads up to 80 kN.

Exlar’s roller screws function in a similar manner as acme screws or ball screws, with a nut travelling on a threaded shaft. However, unlike acme or ball screws, Exlar roller screws are capable of carrying heavy loads at high speeds with high duty cycles for thousands of hours.

Electromechanical systems using roller screws offer advantages over hydraulic or pneumatic systems, as they do not require a complex support system of valves, pumps, filters and sensors. They require much less space and deliver significantly long working lives with minimal maintenance. Further, these systems eliminate hydraulic fluid leaks and significantly reduce noise levels, resulting in highly efficient operation. Electromechanical systems also offer increased flexibility, making them suitable for diverse applications.

Exlar’s planetary roller screws are suitable for applications in machine tools (presses, broaching, grinding, dressing, cutting), plastics, glass and textiles (mould closing, toggle drives, eject axes, transfers, shifting), assembly (riveting, fastening, joining, clamping, part positioning, weld guns) and food and beverage (volumetric filling, palletising, cartoning).