The Plate Clutch Apparatus has been designed specifically for Motor Vehicle Technician Courses. It provides a means of demonstrating the effect of the mean radius of the friction surfaces and the spring pressure on the torque transmitted by a plate clutch. The apparatus maybe used effectively by the student in the laboratory to carry out simple experiments to investigate the relationship between the normal pressure applied to the friction surfaces, the mean radius of the friction rings and the torque at which slip occurs. Three sets of clutch rings with varying mean radius are supplied and provision is made so that the student can observe the effect on the slipping torque when using more than one pair of friction surfaces. The apparatus may be wall mounted or fitted to the Universal Bench Mounting Frame.