About the Robot Arm The AL5A robotic arm delivers fast, accurate, and repeatable movement. The robot features: base rotation, single plane shoulder, elbow, wrist motion, a functional gripper, and optional wrist rotate. The AL5A robotic arm is an affordable system with a time tested rock solid design that will last and last. Everything needed to assemble and operate the robot is included in the kit, with several different software control options. Note that we have tested the arm to hold at most 4oz at full reach without any additional products such as the wrist rotate upgrade installed on the arm (which decreases the payload). The lift capacity increases as the load is closer to the base, but depends on the configuration of the arm. The Mechanics The aluminum robotic arm is made from our Servo Erector Set components for the ultimate in flexibility and expandability. The kit consists of black anodized aluminum brackets, Aluminum tubing and hubs, custom injection molded components, and precision laser-cut Lexan components. The arm uses 1 x HS-422 in the base, 1 x HS-755HB in the shoulder, 1 x HS-645MG in the elbow, 1 x HS-422 in the wrist, and 1 x HS-422 in the gripper.