What is a drawbar in a workholding system?

A drawbar connects the holder or pallet to the chuck’s clamping mechanism. The chuck pulls on the drawbar to hold the assembly in place.

It acts like a clamp, using force to hold the workpiece holder or workpiece tightly within the chuck. This is especially important during machining when the tool experiences strong cutting forces. By counteracting these forces, the drawbar ensures the tool stays in place, maintaining precision and safety.