Drills are incredibly useful tools, but even the best of them can shut down without warning. If you pay attention to what the drill is doing when it is working efficiently and at its peak capacity, you’ll be better able to troubleshoot problems when they arise.
Drill Does Not Work:
First thing to do when the drill doesn’t work is check for an electrical problem. Is the drill fully plugged into the wall? If so, then check the main service panel to determine if the fuse has blown or the circuit breaker has tripped. You may have to wind up replacing the power cord if electricity turns out to be the problem.
Drill Vibration: A drill that vibrates or even rattles could have several causes. Check the housing fastener to make sure it hasn’t come loose. Vibrating drills can also be caused by a damaged chuck. If the motor fan is damaged, it may need to be replaced. Make sure that the bit is not loose or damaged. Tighten the chuck or replace the bit.
Overheating Drill: If your electric drill is overheating, the problem may be that extension cord isn’t the correct size or rating. A damaged bit can also cause a drill to overheat. Clean the air vents with compressed air or reduce strain on the motor if neither of the above is the problem.
Motor Hums/Drill Doesn’t Work: You can hear that motor humming, but there ain’t drilling going on. You know the problem here? Could be a jammed or loose bit which merely needs to be tightened. The bit may need to be replaced or the chuck may need to be serviced.
Sparks: A case of sparks flying from the motor housing can mean that the brush has become worn or dislodged. Needle-nose pliers will come in handy for servicing the brush. Look for things like a damaged spring, cracked housing or pitted brush. Sparks from a drill may also be caused by a dirty motor.
Wobbly Bits: Wobbly bits are most usually caused by the bit being loose. Sometimes the bit can be damaged or just plain be incorrect for the job at hand. Tighten the chuck and if that doesn’t work, replace the bit. The chuck itself could be damaged; that would cause a wobbly drill bit.
Speed Limit: If the speed of your drill is limited to just one setting or can only turn in one direction, you’ll most likely need to replace the variable-speed switch.