Non Leather repair on electric drill and sander
1) BOSCH electric drill model CSB 550 RE (550 Watt diameter max 15mm) purchase since 1989).
2) BOSCH rotary sander model GEX 125 AC (340 watt 4500-12000 min-1 , diameter 125 mm).
1) This comes about when the BOSCH electric drill started intermittently stop working and arching at the commuter area. Hence use this opportunity to verify the problem noted.
True enough the electric drill have defect on the carbon brush.
TIPS #1 :- is you observe carefully a good unit carbon in contact with commuter plate, if there are bigger arching light then it best to open to check status on carbon brush length.
TIPS #2 "- it recommend to check carbon brush status base on your usage of drill.
This drill have two issue a) the electric cord have broken wire and b) worn off carbon brush.
Remove wires and pull both wires by hand, the wire is broken before the fastener. repair done
verify carbon brush status
Compare length of carbon brush between old (left side) and new part.
Noted the old carbon brush have metallic part embedded which cause commuter surface with scratch mark.
Very obvious scratch mark, hence need to use sandpaper to smoothed the valley
Found the air filter capacitor at mains input to be leak and defective, removed.
Use a small strip of sandpaper to reduce valley
CEX 125 AC rotary sander, check carbon brush status and clean inside.
After disassemble top cover to sander.
How to remove wire to carbon brush.
Tools for this task.
Carbon brush code #045. Both carbon inspected and still ample length so no action needed.
Just vacuum for dirt an dust.
Check on motor parts looks good so far.
End of document 👴