Auger bits
Auger bits are wood borers , which are relatively long in comparison with other wood drills normally and therefore similar in the central part to improve the chip removal as an Archimedes' screw are constructed. As with this one, the pitch of the helix is very low, especially compared to other twist drills.
Structure and functionality
In contrast to other wood drills, where this only happens occasionally, the center point of the auger bit usually has a thread with which the bit pulls itself into the wood. However, this is not the characteristic property, it is simply more common for this type of drill than for others.
The middle part then contains the screw that winds around the core rod, giving it its name "like a snake". This screw can be used to convey the parts chipped and lifted off by the drill head out of the increasingly deeper borehole. In rare cases, auger bits are designed with two threads, i.e. That is, to stay with the picture, two "snakes" wind around the core rod.
Some higher quality auger bits still have a small scoring point at the tip to create a cleaner hole without tears. This is especially important with softer woods.
The auger bit is mostly used for deeper holes, unlike conventional wood drills.
The type of mounting on a drilling machine is manufacturer and device-specific and not decisive for this special type of drill.
literature
- Anton Kohl, Kurt Bastian, Ernst Neizel: Building Science: Basics . 2012, ISBN 978-3-519-45601-8 .
Web links
- Use Auger Bits with Pre-Drill on YouTube , accessed May 31, 2018.
Individual evidence
- ↑ Caroline Dey, Michael Bloß: Do-it- yourself with the router, circular saw & Co. 2011, ISBN 978-3-8289-2658-5 , p. 27 .