ABB 3HAC17117-3 Counter Balancing Pneumatic Cylinder

3HAC17117-3 is ABB's counter balancing cylinder, a Type B balancing unit designed for ABB IRB 6600 and IRB 6650 robots. As a counterbalance device, it provides gravity compensation on the robot's vertical axis to stabilize motion, reduce actuator load during high-inertia operations, and improve precision when lifting or traversing heavy payloads. The ABB maintenance documentation for balancing devices 3HAC17117-2/3 notes that the complete balancing assembly can weigh about 198 kg when dismantled from the robot, illustrating its robust, industrial-grade construction. Some current listings indicate the model may be discontinued by ABB and show replacement part 3HAC020692-001.