The single-phase short-ring electric motor is a squirrel-cage-type rotor induction motor and its stator is of protruding poles with cavities. In it are placed copper or brass rings, which embrace half of each pole.
A flow is created by the rings, this occurs because of the induced currents produced by the variable flow, because it is lagging behind in the flow, resulting in a spinning field. The rotor within it is forced to rotate in the same direction, because of the field produced by the induced currents in the bars housed in the grooves of the rotor.
SKF-Bearing OSNW 32X5.7/16
This motor is built for voltages of 110V and 220V, 50 or 60Hz, 25W to 120W and usually for 2, 4 and 6 poles, and for speeds of 900 to 2800 R.P.M. At 50 Hz and 1000 to 3400 R.P.M. To 60 Hz. They have constant speed and do not allow adjustment nor reversibility, it is a low torque starting and low performance motor.
It is in small machines that this type of motor is used, such as: turntables, clocks, servo mechanisms, etc.