Product Announcement from Exlar
Available in diameters from 3.5 to 150mm, Exlar PRS Series roller screws provide solutions to a wide range of applications - from the most compact and precise to the largest and extremely high load requirements.
Roller Screw Advantages •Roller screw design provides high speeds, stiffness and shock load resistance.
•Large static loads - up to 779,000 lbf.
•High screw speeds - 5,000 rpm and above
•Up to 15 times longer life than comparably sized ball screws.
•Ideally suited for continuous duty applications.
•Preloaded nut options for zero backlash.
•Variety of flange designs
This robust roller screw design is composed of rollers that are manufactured with precisely the same thread angle as the nut. This construction is particularly well-suited to applications that require very high loads and high speeds. This is possible because Exlar's planetary roller screw designs provide manu more contact points than possible on comparably sized ball screws. The result is higher stiffness, higher load capacity and 15 times the travel life of similarly sized ball screws. The diagram at right shows the number of contact points in a ball screw compared to the number of contact points in a roller screw.
Planetary roller screws are used in the most critical, demanding and precise applications requiring linear motion. Roller screws offer a perfect replacement for hydraulics because of the load and cycle capability.