Because the AGI Model AGSL linear actuators have no mechanical connection between carriage body and piston, the enclosed piston prevents contaminants from escaping. The anodized aluminum carriage is guided on precision linear bearings and rides on hardened ground shafts to move smoothly while supporting tool plate and attached loads. Precision sealed ball bearings also provide precise, rugged linear motion. Available in .625 and 1in bore sizes, these actuators feature pneumatic long stroke linear motion components that are double acting air cylinders and require a four way two position valve. The lack of piston rod in the cylinder reduces the length of the actuator, making it ideal for confined spaces or long strokes. Stroke lengths are up to 132 inches and proximity sensors are available to signal the end of stroke positions. They are also pre-lubricated, with 304 stainless steel tubing and U-cup seals for lower dynamic friction.