Auger Bits and
Augers are a type of drill bit usually with a single
spiral or double spiral shaft used for drilling / boring into wood. This type
of drill bit is sometimes referred to as a spiral auger drill bit.
A single spiral auger drill bit is sometimes referred to as a 'Single Helix Auger'
or 'Single Twist Auger' and a double spiral auger drill bit is sometimes referred
to as a 'Double Helix Auger' or 'Double Twist Auger'.
The spiral design allows the auger bit to drill quickly and smoothly with the
excess waste material given escape space via the spiral(s). This simple but
clever design mechanism helps to remove risk of jamming / binding.
If this spiral design wasn't present it would result in the excess wood chippings
having little way of getting out of the drill hole resulting in the drill bit
jamming, it would then require the drill bit to repeatedly be removed from the
drill hole and the excess chippings removed, this would be very time consuming.
Auger bits usually have a screw thread tip which helps the drill bit to make the
initial bind by the screw thread drawing the drill bit into the wood. the screw
thread further helps by regulating the drilling speed.
You will find spiral auger bits with different screw threads. The coarser the
screw thread the quicker it drill but the more effort it takes, the finer the
screw thread the slower it drills but the less effort it takes.
Auger bits generally are / have been made in sizes 1/4" - 2".
Auger bits have been made and used for a long time since the early 1800's as such
these quite often pop-up secondhand.
Traditionally auger bits were originally used with a hand drill called a
'Brace'.
Together these were called 'Brace and Bits'. With the invention of the hand drill
they were then able to be used in hand drills also.
Auger bits / augers are used for drilling / boring holes into wood.
This can also include boring a series of holes to help clear a mortice.
Different types of auger bits include:
Different types of augers include:
These are both names for a long running type of spiral drill bit. A screw bit is just another name for an auger bit.
An 'Auger' is a longer, sturdier drill bit usually with a helix / double helix
design. An
auger may be designed for use in a breast drill or it may be designed with a
horizontal eye ending to allow the user to slot a piece of wood through it and
then turn the handle to use.
An 'Auger Bit' or 'Screw Bit' is a drill bit shorter than an auger usually with a helix /
double helix design. An auger bit or screw bit is designed for use in a brace or
hand drill for common woodwork drilling / boring tasks.
For instance on the same page of a manufacturers catalogue labelled 'Auger Bits
and Augers' there is a 'Gedge's Pattern Screw Bit' and there is a 'Gedge's
Pattern Screw Auger'. The helix spiral and drill end look the same on both drill
bits with the auger version being longer and sturdier.
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