The operation principle and protection is the same on all types of Flaton Torque Limiter Clutches. A Friction Cone of special fibre, is perfectly fitted into the threaded and taper bored Housing. This integral cone is backed up with a thrust bearing. The Friction cone is held at the proper tension to transmit torque required, by a silicone rubber pressure ring which is forced against the ball racers by an adjustment nut. The adjustment nut has twenty equally divided notches into which a cone point setscrew is tightened through a tapped hole in the housing, locking the adjustment nut at the predetermined working torque. For extremely delicate settings the cone point setscrew can be transferred to a second tapped hole in the housing provided for this purpose. The amount of torque can be increased or decreased by tightening or releasing the adjustment nut as the condition demands.
An electrical shut-off can be purchased with the "torque controlling" features mentioned above. The drawing illustrates our type "FCL" flexible coupling, and the following, and the following clutch action occurs when an overload exists;
If the input shaft is mounted in the thrust head side of the coupling, when overload occurs, all the parts outlined in white; thrust head, friction cone and half of the thrust bearing will continue to rotate. The parts outlined in black; driven sprocket, chain, housing, adjustment nut, pressure ring, the other half of the thrust head, which has external threads under the shut-off spool location, will cause the shut-off spool, which has an internal spring loaded segment nut, to traverse either to the left or right, depending on the direction of rotation . . . activiating the limit switch. The limit switch will shut-off the electrical current, ring a bell, or both.
To re-set the shut-off spool, manually push over the 90 degree threads on the thrust head, to a central location with the roller lever of the limit switch, or by "Push button-spool return" illustrated under "Specialty application" index.
Copyright 1998 Flaton Machine Works Incorporated.