The SKR-type LM guide actuator with Caged Ball Technology is a compact actuator that places a nut block(s) that integrates an LM block and ball screw nut onto the inside of the LM rail of a U-shaped cross-sectional form. Moreover, the addition of the LM guide and ball screw sections with Caged Ball Technology allows the SKR-type LM guide actuator to achieve higher speed, lower noise, longer maintenance-free operation, and other features in comparison with the conventional KR-type.