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Toolbox: Large-bore Drill Bits

Help Around the House : Episode ARH-303 -- More Projects »
Most of the drill bits used around the house are small, usually a half-inch in diameter or less. But projects such as running pipes and wires or installing new door locks call for a larger-gauge bit. For these tasks you'll need specialized drilling hardware such as paddle bits, hole saws and auger bits.
PHOTO

Figure A
PHOTO

Figure B
PHOTO

Figure C
A one-inch paddle bit typically has spurs for extra cutting power and a pointed tip to keep the bit in position while drilling (figure A). A bit like this is used to install the dead bolt and striking mechanism in a door.

A 2-1/8 inch hole saw cuts through the body of the door and creates the opening for the locking mechanism (figure B). It's called a saw because it has cutting teeth.

An auger bit has a screw on the tip to make it easier to get started (figure C). An auger bit's used when you need a hole quick and it doesn't have to be pretty.

Always use caution when working with power drills, and be sure to wear adequate eye protection.

Also in this Episode
Help Around the House : Episode ARH-303
•Painting a Windowsill
•Crown Molding with Corner Blocks
•Concrete Floor Patch
•Toolbox: Large-bore Drill Bits
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