The hydraulic actuator is responsible for clamping the work piece. Hydraulic fluid from the Hydraulic Power Unit (HPU) applies pressure to a piston within the actuator. The piston then moves fore or aft, clamping or unclamping the work piece. The drawtube is threaded onto the actuator’s piston and then onto the chuck or collet. When the piston actuates, the drawtube moves with it, and this is what transfers the clamping and unclamping motion of hydraulic actuator to the chuck.
Common issues with a hydraulic actuator include vibration and leaking. Vibration can be mitigated by ensuring that all of the spindle drivetrain components have the least amount of geometric misalignment possible. Leaking can be caused by worn seals within the actuator. These can be replaced with a kit from the actuator's manufacturer.
- Hydraulic Actuator (i.e. Union, Cylinder)
- Hydralic Power Unit (HPU)