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New precision clutches eliminate ‘stiction’

03 April 2007

The manufacturing process of Polyclutch® from Huco Dynatork ensures the component’s static friction is lower than its dynamic friction. This brings important performance benefits. When employed in mechanisms handling paper, film, wire or thread, for example, Polyclutch maintains constant tension with no sudden shocks that would damage the product.
Similarly this new addition to the Huco Dynatork range ensures smooth and accurate starting and stopping of indexing systems and linear actuators. It is ideal for slip at the end of stroke.
For protection during overload Polyclutch provides repeatable cushioned torque, the accuracy of which also makes the component the ideal choice for torque control on capping machines, automatic screw driving and valve control. It additionally works well as part of a friction hinge mechanism where smooth movement of lids, doors, screens and covers is required.
Polyclutch complements Huco Dynatork’s established Vari-Tork torque limiters with the new range meeting the need for higher torques. Constant torque is assured by a series of interleaved friction discs with soft springs that maintain pressure on the friction members.
A wide choice of types, torques and configurations is available to suit a broad variety of applications. The complete range comprises continuous slip mechanical clutches, pneumatic slip clutches and one-way clutches. All of the mechanical slip clutches are manufactured to provide a long operating life of typically over 30 million cycles.
Noteworthy options in the range include the Polyclutch Slip-Ease mechanical slip clutch that uses an axial loaded multi-plate design for applications where space is at a premium and low backlash is required. Polyclutch Slip-Aire is an air actuated version of the mechanical Polyclutch slip clutch. It is ideal for servo mechanisms and able to transmit higher torque levels than comparably sized mechanical slip clutches.

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