DeWalt DCF895 Brushless Impact Driver – shown here with compac…
DeWalt DCF895 Brushless Impact Driver – shown here with compact battery. Let the teardown begin.
Remove Torx screws that hold clamshell housing halves together.
Remove Phillips head screws that hold gear housing in place.
Peel rubber cover off end of gear housing.
After removing two Phillips head screws lift off the hex chuck a…
After removing two Phillips head screws lift off the hex chuck access cover.
Pull out spring-loaded accessory release button (you load bits b…
Pull out spring-loaded accessory release button (you load bits by pushing them into the chuck; to get them out you must push this button).
Lift off ring that contains the three LED lights.
After peeling off the adhesive stickers that span the joint pull…
After peeling off the adhesive stickers that span the joint pull the housing apart and remove the mechanical parts.
This is the speed selector switch (the tool has three speeds).
Unclip wiring harness from electronic controller.
Remove Phillips head screws from back of controller.
Pull controller off the bearing on the back of the rotor (the ro…
Pull controller off the bearing on the back of the rotor (the rotor is the part of the motor that spins).
Pull stator off of rotor (it’s tough because a powerful magnet…
Pull stator off of rotor (it’s tough because a powerful magnet in the rotor is holding it on).
Here are the main components of the brushless motor. Brushless m…
Here are the main components of the brushless motor. Brushless motors are more durable (no brushes or commutator to wear out) and more efficient (so they boost the runtime of cordless tools) than conventional brushed motors.
I tear things apart so you don’t have to. Well, not really – I tear things apart because I am curious about what’s inside, especially when the manufacturer makes a big deal out of it. Lately, the big deal has been brushless motors so I disassembled DeWalt’s new brushless impact driver and shot these photos.
I didn’t mess with the gears or battery because they’re no different than what you would find in a tool with a brushed motor. And I didn’t ask DeWalt how to take the tool apart so don’t take my instructions as gospel. The impact driver worked fine after I put it back together – but taking it apart probably voided the warranty.
