Abstract: The torque exerted by an electric motor upon its mounting flange is determined by measuring the reaction torque. For this purpose the motor housing is connected to the flange so that it has limited freedom of angular turning movement relative thereto, and such movement is detected by strain gauges or similar devices which yield a signal proportional to the degree of turning movement.

Abstract: An arrangement for measuring a radial force applied to a roller bearing of a device has an inner element connected with the roller bearing for joint displacement therewith under the action of this force, an outer element mountable on the device and outwardly surrounding the inner element so as to form a gap therebetween, and a web extending through the gap and connecting the elements with each other. The web is stressed in response to displacement of the inner element with the roller bearing in a generally radial direction of the gap, whereby signals commensurate with the degree of stressing of the web are originated. The elements may be formed as rings concentric with each other, and the web may extend in the radial direction of the rings. Instrumentalities are provided for transmitting the above signals, such as electrical signalling instrumentalities. The latter may include two strain gauges mounted on the web.