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One of the benefits of a rod style actuator is that its housing can be completely enclosed, with a seal on the thrust rod to prevent contamination or liquids from entering through the rod opening. This design makes it possible to achieve high IP ratings for applications with exposure to water and liquids, such as washdown processes in the food and beverage industry.
And with the recirculating bearings (for ball and roller screw designs) are completely enclosed, the housing and thrust rod can be specially coated or constructed of stainless steel to make the actuator suitable for hygienic, food-grade, or corrosive applications — a feature that is difficult to achieve with slider type linear actuators due to their open construction.
Image credit: Curtiss-Wright Exlar
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