A cordless drill is an electric drill which uses rechargeable batteries. Drills are primarily used for drilling circular holes in material, or for inserting screws and other threaded fasteners into material.
Drills are also available in the impact driver configuration, high-torque tools primarily used for driving screws and tightening nuts. Impact drivers can be especially useful when driving larger fasteners or driving into harder, more dense materials.
Always use a spoil board under your work piece when using a handheld drill.
Main Article: Drill Bits
Below are several types of drill bits that can be used with a handheld drill.
- Twist Bits - General Purpose: The tip of the bit cuts the material, while the flutes (spirals) remove the spent material from the hole and keep the bit straight. Most of the bits in the Idea Shop can be used across wood, metal, and acrylic -- be sure to adjust RPMs accordingly. When drilling into metal, be sure to use a lubricant.
- Spade bits: For making through holes in wood and other soft materials.
- Coutersink bits: An attachment used in conjunction with a twist drill bit, to create holes for screws or other fasteners to sit flush or inset into the material.
Always Wear Protective Eyewear. Avoid Baggy/Loose Clothing. Loose sleeves, jewelry and hair can be a hazard when you are operating a power drill.
Secure Your Work Piece. Insert and properly set your drill bit. Hand tighten chuck and make sure bit is spinning concentrically before tightening. Use a center punch to start holes.
Ensure drill is set to proper rotation before beginning. Adjust the clutch according to material hardness - the lower 1 setting for driving screws or other fasteners, while the 2 setting can be used for drilling holes into your material.
Throughout operation, apply proper pressure to the drill - not excessive. Peck drill for harder materials or longer holes if necessary. and drill smaller pilot holes before attempting large holes.
Avoid mounting larger drill bits (over .5") on a cordless drill. The amount of torque required to spin and produce a successful hole can spin the drill out of the user's grip.