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A torque limiter is a mechanical overload protection device designed to protect mechanical equipment from damage. The torque limiter trips when an excessive torque load occurs and physically disconnects the drives and driven components almost instantaneously. This protects the machine from seeing excessive loading due to the accumulated rotation energy upstream of the torque limiter. The protection provided could mean avoiding expensive machine crashes or secondary disasters. This is a very applicable means of protection, but numerous factors need to be considered before the torque limiter method is chosen. In physics, torque can be thought of informally as rotational force. The SI units for Torque are newton meters although centinewton meters (cN·m), foot-pounds force (ft·lbf), inch pounds (lbf·in) and inch ounces (ozf·in) are also frequently used expressions of torque. ...