Torque Chucks

Expanding Torque Activated Core Chucks are mainly used in the paper industry on printing machines, packaging machines, Unwinders and Rewinders They are used to ensure that a reel of paper or other material adheres to a brake or drive during both winding and unwinding the torque & inertia from a rotating reel to grip the cores.

Operating Principle

All Torque Activated Mechanical Chucks supplied by Rimor use an eccentric spindle at the centre, which by means of twisting moment generated by either a braking action or drive, rotates and pushes the expanding pads against the reel-core thus gripping the core.
With this system, locking is obtained by a force directly in proportion to the twisting moment, thus ensuring locking under all work conditions which automatically centres the Reel.

Advantages

• Flange arrangement built to the client’s specifications in a single piece, incorporating the centre spindle and drive axis.
• A thrust-resisting flange on the sector-guide ensures reliable expansion even if there are axial loads.
• Expansion sectors with a large contact surface in order not to deform or damage the core if heavy loads are applied.
• Automatic locking in both rotation directions, without the operator intervening.
• Guaranteed operation even with high axial loads or low torque values.
• High expansion and core locking thanks to the configuration of the eccentric spindle and grooves on the pads.
• No maintenance thanks to sealed bearings and calculated tolerance.
• All chucks have protective treatment applied aimed at preventing oxidation.