The most common problem with handheld electric drills are a result of is dirt, dust and grime. The most common effect is the copper connections on the armature get coated and stop conducting properly.
- sand paper
- Taking apart
- Remove the 3 back screws and take off back cover
- Remove the trigger but pushing the unlock button
- You do not need to remove the brushes
- Remove the internal screw
- remove the front of the drill
- carefully remove the armature, and any cover that may be in front of it.
- Figure 1 shows a various part locations for a Craftsman drill
- To Clean it
- Take apart the drill (carefully)
- remove the armature
- Sand the copper so it shiny and smooth.
- clean, remove any copper filings
- Clean the rest of the drill the best you can
- Note the gear box is supposed to have grease in it, so if its not giving you problems don't clean it.
- Figure 2 shows a clean copper conductor on the armature of a Craftsman drill.
- Put together drill
- place parts back in the same order the were removed