How to make a device from a transformer for quickly checking the armature of an electric motor

For those who often repair burnt-out engines of angle grinders, drills, screwdrivers, planes, jigsaws and other tools, an anchor tester will be very useful. This is a simple device to manufacture, which is made from a transformer. With it you can identify burnt out rotors quickly and clearly.

What you will need:

transformer OSO 0.25/1-UZ;
insulating tape;
double circuit breaker;
the wire;
fork.

Device manufacturing process

On the transformer core it is necessary to cut a wedge to the coil.

It is made so wide that an anchor can be placed in it. To do this, the transformer is clamped in a vice. To avoid damaging the winding, it is better to wrap it with a couple of layers of cardboard.

Then the winding is wrapped with electrical tape. Next, a wire with a plug and a switch is screwed to the transformer.

If you apply a working armature to the cut of a transformer connected to the network, it will not magnetize. To check it, you should turn it completely and examine the magnetism over the entire surface.

When the rotor is short-circuited, when turning, there will be magnetic areas on it that attract metal objects. In this case, the reason for engine failure is in the armature.