Yeh, I only asked about cutting the wires because on mine they were pressed onto a
plug at the other end which I didn't want to cut. So I couldn't remove the sliprings without punching the whole bearing out.
If you have that much damage to the sliprings then something has worn/or misaligned badly to cause the grooves. Brushholders ? Bearings ?
Replacing the sliprings might fix the symptom and not the cause.