This thesis describes the development of a sensor for measuring Frictional and Normal Stresses in the roll gap. The design and construction of an experimental rolling mill is also described.

The normal stress measurements were judged satisfactory in that they were in good agreement with the roll separating force measurements.

On the other hand the friction stress measurements yielded values of roll torque considerably in excess of the measured values. This discrepancy is attributed to transmission of frictional force by elements of the sensor assembly to the sensor prior to its entrance into the roll gap. The analysis of the action of these elements of the sensor assembly provided the basis for an improved sensor, the details of which are described.