Both styles of actuators convert electrical energy to linear motion via a motor and gearbox, but the main difference is how that linear motion is delivered. In your standard rod linear actuator, the rotational motion from the gearbox is converted to linear motion by the use of a lead screw which extends and retracts the rod. The track linear actuator still makes use of a lead screw to convert rotational motion to linear motion, but instead of a rod, it uses a sliding carriage that moves along the length of the lead screw. This means there is no telescopic motion, like with rod linear actuators, but has a fixed length that the carriage slides along. Outside of this difference, you will see that most track actuators will have similar specifications, like available stroke lengths and load capacities, as their rod actuator counterparts. This fixed length is both a benefit and drawback of the track linear actuator. While the fix length will not provide telescopic motion needed in applications like opening a hatch or door, it is ideal for sliding applications. The fix length also makes designing around the actuator more predictable, as the actuator’s length won’t change, and track actuators are sturdier than rod actuators once installed, as there is no moving end point. Although, one drawback of their design is that the lead screw, which the sliding carriage moves along, is exposed and leaves it vulnerable to debris. This will be reflected in the IP rating of these actuators as they are typically rated lower than their rod actuator counterparts.