The Ortlieb SSF QUADRO collet chuck is a precision workholding system for CNC lathes and rotary table applications. Unlike conventional 3-jaw chucks that use external jaws, the QUADRO SSF uses collets (DIN 6343 steel or Rubber-Flex RFC) drawn into a tapered sleeve by a self-locking ball mechanism. The balls transmit closing force to the collet sleeve without backlash, and the self-locking characteristic means the workpiece remains clamped even if actuation force is removed — a safety advantage during power interruption.

Why use a collet chuck instead of a jaw chuck?

Collet chucks provide higher concentricity and more uniform radial clamping than jaw chucks because the collet makes full-circumference contact with the workpiece rather than contact at three discrete jaw points. This reduces part distortion on thin-walled rings, bushings, and precision-ground shafts. The trade-off is a narrower clamping diameter range per collet — but the QUADRO SSF compensates for this with Rubber-Flex RFC collets that accommodate diameter variations up to 0.7 mm without requiring cap readjustment.

How does the self-locking ball mechanism work?

Turning the manual lever drives a wedge sleeve that forces steel balls radially inward against the collet sleeve. Once closed, the ball-and-wedge geometry is mechanically self-locking — vibration or loss of actuation force cannot release the collet. This is a key differentiator from spring-closed collet systems that can open under heavy cutting loads or during power loss. Pneumatic cylinder actuation is available as an option for automated loading systems.

Note: The workholding category label in the source data described this product as a "3-jaw turning chuck," but the Ortlieb SSF is a collet chuck — it uses collets (continuous-circumference clamping) rather than discrete jaws. Forkhead, joint bar, and mounting bolts are machine-specific and not included in the standard scope of delivery.