How to Countersink a Screw with a Speedbor

Spencer and I have built quite a few things together and he knows a lot of great tips and tricks for getting things to work the right way. One tip for drilling and screwing wood parts together is to countersink a screw.

There are a few reasons why someone would want to countersink a screw but the two most common reasons are: You want your screw to be level with the wood or You need your screw to reach a little bit longer to screw the wood together for a tight fit.

Sometimes you may need to countersink a 1/4 of a inch and sometimes you may need to countersink 2 inches!

Whatever the reason you need to do or whatever the depth you need, you will want to use a speedbor to drill a countersink hole. Using a speedbor, in our opinion, is the most simple way to countersink – and it elements the need to pilot drill, just make sure you buy good screws.

Spencer and I have this set of speedbors that we purchased from Home Depot.

When we drill a countersink for a screw we always us the 3/8.

Drill A Countersink Hole with a Speedbor

Attach the speedbor tightly to your drill.

Poke the top of the speedbor into the wood.

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Pull the trigger and start drilling. You need to go at a pretty high speed with a fair amount of pressure. Depending on the depth you need, if you go to slow you won’t be able to drill and without pressure you may burn your wood.

Drill straight down as far as you need to go. In this picture I had drilled down a little over 2 inches.

Back your drill/speedbor out and you will have your hole!

Now, you simply insert your screw into the hole and screw it into your other piece of wood and tighten it up!

Use wood filler to fill the hole, if you desire, and you are done.

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Hey there! We are Spencer and Amanda, a DIY husband and Wife team, sharing projects we build and create together for our home. Since buying our home in 2007 we have had the saying that Spencer builds it and makes it work and Amanda makes it look good. We hope you will stick around because we always have projects in the works!

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  1. littlemike says:

    Technically, this is known as counterboring. Countersinking is where you create a recess just deep enough for a flat-head screw to sit flush with the surface, usually with a cone-shaped tip cutting tool, often called a countersink (it can also be done with a twist drill and a VERY light touch to prevent going too deep). The method you show, counterboring, creates a larger hole concentric to the screw hole, deep enough for the fastener head to seat below the surface, sometimes well below the surface, as in the example you show here, where it is 2 inches below. This is a handy way to conceal your fasteners, covering their heads with putty or a wood plug (preferred).

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