The Ultra Module is used to build a torque limiter by fitting a hardened seat into one half of a coupling and the module unit into the other in such a way that torque is transmitted between the drive ball and seat. This produces an end thrust in the plunger in proportion to the applied torque. This force is resisted by a ring of balls trapped between a flat surface and a conical washer loaded by disc springs.
When the axial force reaches a level greater than the reaction through the spring mechanism, the ball and plunger will retract forcing the balls up the plunger slope and allowing the ball to disengage from the seat. The balls are then located on the larger diameter of the plunger and all forces are balanced internally allowing the torque limiter to run free and unloaded.
The trip torque is externally adjustable and is achieved by turning the adjustor to increase or decrease the spring pressure. Resetting is accomplished by simply aligning the two halves, positioning the ball over its seat, and tapping the reset pin with a soft hammer. Automatic reset versions are also available.
Ultra Module units may incorporate an optional limit switch plate, which moves on trip and can operate a switch to stop the drive.
Manual Disengagement is achieved by clockwise rotation of the disengagement sleeve. This feature disconnects the drive and can be a useful tool for equipment setup maintenance, and can also be used as a replacement for standard jaw clutches.
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