What is a brad point bit?

 
     
     
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 Example of a brad point bit 

A brad point bit, also known as a wood bit, is a tool designed to bore accurately and neatly through wood. Where twist bits might skate around on wood fibre before starting to bore a hole, brad point bits can drill holes with pinpoint accuracy.

 
     
 Labelled image of a brad point, which is usually found at the end of a wood bit. 

This is made possible by the part of the tool that gave it its name: the brad point. The sharp brad digs into the surface of the wood and fixes the bit in place to ensure it bores a hole exactly where you mean it to.

 
     
 Brad point bit with the spurs labelled to indicate location 

Sharp spurs at the drill bit's circumference cut cleanly through wood fibres, while horizontal lips shear out material as the drill moves through the workpiece. Effectively, this means the drill cuts the outside of the hole first.

 
     
 Image illustrating why brad point bits are known as W-point bits 

Due to their physical characteristics, these bits are sometimes referred to as lip and spur bits or W-point bits.

 
     
 A brad point bit being used to drill holes through a composite material similar to Kevlar 

Some varieties of brad point bit can be used to drill through materials that are harder than wood. For more information, see: What is a brad point bit used for?

 
     
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