Electric motors of the brakes type are supplied with an initial air gap. In this case the separation between the plateau and the flange is set at the factory in its minimum value. When the brake linings wear out normally, the working air gap gradually increases, and this does not affect the proper functioning of the brake until it reaches the maximum value.
To readjust the air gap to its initial values, we must follow some procedures, as described below:
1) Remove the securing screws of the protective cap;
2) Remove the screws of the protective strap;
3) Measure the air gap at three points, close to the stud bolts, with a set of standard blades (spy);
4) If the readings are different from each other, continue adjusting as follows:
– Unscrew the nut securing the flange of the electromagnet, approaching or moving away if necessary, until the recommended initial measurement is reached;
– Tighten the three adjusting nuts equally, leaving the same length on the three springs;
– The size of the air gap must be uniform at the three measurement points, close to the captive screws.