Types of Drill Bits

types of drill bits

What drill bit are you going to use?  Larsen?

I need to discover the words and phrases that people, you guys, are looking for.  This whole game with Google, some call it the dance.  Since this is a small time operation, I need to find topics that are being looked for that people haven’t fully exploited yet.  I may have found one – types of drill bits.

And since I love charts and the plugin here that makes them, I decided to today create a comparison chart that easily shows types of drill bits.

The first column is like a general class and then each of those, universal, wood, etc., break down further into like the step and spade bits.  Got some little notes in  the chart about what they are used for, what you may use or want them for.  And then motivation permitting, some notes from yours truly about which of these as a homeowner you should have and which of these as a building engineer you should have.  Basically if I think that type of drill bit is useful or not.

Twist Bit
Light Metal
twist drill bit
Step Bit
Metals - steel, copper, brass, aluminum
step bit
Brad Point Bit
brad point bit
Spade Bit
spade bit
Countersink/bore Bit
countersink counterbore bit
Forstner Bit
forstner bit
Auger Bit
auger bit
Hole Saw Bit
hole saw bit
Masonry Bit
masonry bit
Installer Bit
Some metals
installer bit
Glass/Tile Bit
glass tile bit

Which of these types of drill bits are actually useful?

Yo.  Let’s get into it.  I know some of you may not be crawling around your attic trying to switch around your own cable.  Hopefully some of you are though and those that aren’t eventually will be confident enough to after hanging around and reading this site.

First, I would say the essential drill bits for just an ordinary homeowner would be:

  • twist bit
  • spade bit

You can get through some metal, most woods, and you can bore holes in wood for running cable if you want to move an outlet or network connection in your house.

For your above average DIY person I would say that you need the 2 bits above in addition to:

  • countersink/counterbore bit
  • auger bit

These 2 types of drill bits will let you make better looking projects when you can countersink your stuff and conceal it.  The auger bit will allow you to come through your floor joists if you want to move a tv cable outlet or install an internet connection point like through the floor into the center of your living room.

The building engineer should also have these types of drill bits either in his toolbox or in his tool bag:

  • step bit
  • hole saw bit

These bits should be self-explanatory but just in case… these will get us through most metals.  Hole saws for light stuff, the step bit is the best type for counter boring/sinking in metal, and getting pre-measured holes just right.

Types of Drill Bit Details

Twist – split point tip types improve accuracy.  Use a flatter angled bit for harder material.  A steeper angled tip will stay on center better.

Step – usually presets are marked on the bit.  Can be used for countersinking and counterboring.  Handy but limited bit to have around.

Brad Point – super wide flutes for chip discharge.  The brad point improves starting accuracy.

Spade – used for making large diameter holes in wood.  Center point for starting.  Great for home use.

Countersink/bore – probably a must for the homeowner.  Center point for starting.

Forstner – used to make flat bottomed holes.  Can be used to make square holes for pegs, joints, etc.

Auger – huge flutes for chip removal.  Great for home projects when you have to get through a beam or joist.  Usually has a tip for starting.

Hole Saw – drills through aluminum, sheet metal, wood.  Twist bit type pilot usually for starting.  Makes massive holes, up to 6″.

Masonry – drills/hammers a hole through the material.  Used in hammer drills or rotary hammers.

Installer – hole in the bit secures the wire, allowing you to feed it while you drill.

Glass/Tile – spade shaped carbide tip for drilling in glass.  Not very durable, used at low speeds.

That is a wrap on the types of drill bits comparison chart.  Stay tuned for a drill bits material chart lol.

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