Drill bits come in different types and sizes. The purpose of this post is to provide a brief explanation of the most common types of drill bits. These are the most common ones you are likely to use around your home.
A good quality set of high speed and masonry bits will be an excellent starting point.
High Speed General Purpose Bits
- High speed bits are an excellent all round type of bit to use use when drilling into wood, metal, plastics and plywood.
Brad Point (wood) bit
- If you are making furniture or using timber for different projects a brad point bit is useful.
- The sharp point at the end makes it easy for pin-pointing exactly where the centre of the hole is.
- Pressing the bit into the center point prevents the bit from moving.
- The shape of the bit allows the edge of the bit to cut a smooth hole through the timber.
- Attach a bearing to the bit at the point where a specific depth is required.
- The bearing acts as a stop and prevents the bit going further into the hole.
- Masonry bits are used to drill a hole into brick work, block work, concrete or other types of masonry.
- When drilling into masonry material switch the drill to hammer mode.
- Hammer mode allows the bit to cut into the material much easier.
- When the drill is used in “hammer mode” the drill vibrates as it drill into the concrete, brick, etc.
- When drilling is finished remember to switch the hammer switch back to standard drilling mode.
- A spade bit is used for drilling large holes in material such as timber and doors. For example you would use a spade bit to drill a hole for a door lock or inserting a pipe through a hole.
- The sharp point is used to mark the centre point of the hole to ensure accurate cutting of the hole.