Diagnosis
The DEKOPRO 8V Cordless Drill utilizes a mechanical sliding toggle switch located directly above the trigger assembly to control the rotation of the motor. When you want to remove a screw, you need the drill bit to rotate counter-clockwise. If the drill is currently in "Forward" mode, the motor spins clockwise to drive screws into material; attempting to remove a screw in this mode will only tighten it further, potentially stripping the screw head or damaging the workpiece.
Confusion often arises because the switch is a balanced toggle. If the switch is centered (neutral), the trigger is mechanically locked, and the drill will not spin at all. This is a safety feature designed to prevent the tool from starting accidentally during a battery swap or while being carried. To confirm your current setting, look at the position of the slider: if it is pushed fully to the right, it is in drive mode; if pushed fully to the left, it is in reverse mode; if it is dead-center, the tool is locked.
How to Fix It
To switch the drill to reverse for screw removal, follow these precise steps:
- Complete Stop: Release the variable speed trigger entirely. Never attempt to flip the direction switch while the chuck is still spinning, as this can shear the internal plastic gears of the 8V gearbox.
- Locate the Toggle: Find the sliding button located on the top of the drill housing, situated between the chuck and the battery handle.
- Engage Reverse: Using your thumb, firmly push the slider button to the LEFT side of the tool. You should feel a distinct mechanical click as the gear shifts.
- Verify Position: Ensure the button is pushed all the way to the left. If it is only halfway, the trigger will remain locked and the motor will not engage.
- Apply Pressure: Place the screwdriver bit firmly into the screw head. Apply significant downward pressure to prevent the bit from "camming out" (slipping), which is common with 8V motors due to lower torque.
- Trigger Activation: Squeeze the trigger slowly to begin the counter-clockwise rotation and back the screw out of the material.
If That Didn't Work
- Check for Neutral Lock: If the trigger feels "stiff" or won't move, the switch is likely stuck in the center neutral position. Push the slider firmly to the left again, ensuring it clicks into place. If it feels mushy, a small piece of debris may be lodged in the switch track; use a can of compressed air to clear the slot.
- Battery Voltage Drop: If the switch is in reverse but the drill barely spins or makes a clicking sound, your 8V battery may be under-voltage. A low battery cannot provide enough torque to break the friction of a tight screw. Charge the battery fully for 3-5 hours before attempting again.
- Bit Slippage: If the drill is spinning counter-clockwise but the screw isn't moving, you likely have the wrong bit size (e.g., using a PH1 bit for a PH2 screw). Ensure the bit is seated deeply in the screw head and that the chuck is tightened securely by rotating the sleeve clockwise until it grips the bit shaft tightly.
- Stripped Gearbox: If you hear the motor spinning at high speed but the chuck is not rotating at all, the internal planetary gears may have stripped. This usually happens if the direction was switched while the motor was still coasting. In this case, the tool requires internal repair or replacement.
Heads Up
- Avoid "Hot-Switching": Always wait for the drill to come to a complete dead stop before flipping the forward/reverse switch to prolong the life of the 8V transmission.
- Bit Matching: Always use high-quality S2 steel bits. Cheap bits wear down quickly and will slip, which can strip the screw head, making it impossible to remove even in reverse.
- Pressure Balance: When removing screws, apply 70% of your effort into pushing the drill into the screw and only 30% into pulling the trigger.
- Battery Care: Store your 8V battery in a cool, dry place. Extreme cold can reduce the motor's torque, making it difficult to remove stubborn screws.