Dometic designs customized, cost-effective roller screws tailored to your specific application.
Unlike a traditional ball screw, roller screws can be manufactured in a standard or inverted configuration.
Operating on the same principles, the inverted configuration provides a number of benefits including a more compact size and facilitates sealing up to IP69K.
Dometic's unique inverted planetary design provides up to 10 times the life of current market competitors and results in a virtually maintenance-free final product. With superior characteristics, Dometic's roller screws present an ideal solution for any repetitive cycling or high-load applications.
Roller Screws
Why Roller Screws?
Roller screws are at the core of our electric actuator products, converting rotary motion of the electric motor to linear motion of the actuator. They are similar in principle to a screw and nut; however, instead of components sliding relative to one another, they roll. This rolling reduces friction and heat, creating a much more efficient and robust mechanism. Originally patented in the 1940s and 1950s, their usage has been limited due to the high cost and complexity of their manufacturing.
Roller screws have several advantages over ball screws. A greater number of contact points provides significantly higher dynamic load capacity and higher tolerance to shock loads. Their design results in increased rigidity and durability, with up to fifteen times longer lifespan than a similar sized ball screw. Components are high-tolerance, complex, and require specialized machinery and tooling to manufacture. The math that determines their geometry and tolerances is also quite sophisticated.
