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Self-Feed Drill Bits

9 products

This collection brings together three-cutter self-feed drill bits, with a screw tip that pulls itself into the workpiece, used for drilling wood with a drill or screwdriver. They are used in carpentry and in joinery and site work. The brand in the range is DeWalt.

What you will find

  • Extreme Tri Flute bits: three-cutter, for wide and deep holes.
  • Various diameters: for example 22, 25 and 32 mm, with a length of 152 mm.

How to choose

Choose the diameter according to the hole to be made and the length according to the thickness of wood to be drilled through. The shank also matters, as it must be compatible with the chuck or screwdriver. For large holes you need a tool with adequate torque, a firm grip and constant pressure, letting the bit do the feeding.

Supplies are on a quotation basis: write or call us stating the intended use, the quantities and the sizes, and we will reply with availability and terms.

How to choose wood bits: diameter, length and shank
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Frequently asked questions: Self-Feed Drill Bits
What is a self-feed wood drill bit and how does it work?

It is a bit with three cutting edges and a central screw tip that pulls itself into the wood, guiding the hole. It is used to make large, deep holes with a drill or driver. It is used in carpentry, in joinery and on building site work. The DeWalt Extreme Tri Flute bit is an example of this type.

What diameter should I choose for the Extreme Tri Flute bit?

The diameter is chosen according to the hole to be made. In the catalogue you will find diameters from 13 to 32 mm, for example 16, 20, 25 and 32 mm, all 152 mm long. Measure the passage you need before choosing, rather than estimating by eye, because a difference of a few millimetres changes the result.

What bit length do I need to drill through a wooden panel or beam?

The bits in this collection are all 152 mm long. Check that the thickness of the wood to be drilled is compatible with this length and with the depth of the hole you need to make. If the thickness exceeds the usable length, a longer bit is needed, or the job must be done in two stages, from both sides.

Set of 6 self-feed bits or single bits: which is better?

The 6-piece set provides several diameters in one pack, which is useful for anyone who changes size often. Single bits are better when you need just one diameter. In the sets, check which diameters are included, because they do not always match the ones you need.

Which drill or driver do I need for DeWalt self-feed bits?

Large-diameter bits require a tool with adequate torque and a compatible shank. Use a sturdy drill or driver, working at low speed. Check that the bit shank is compatible with the chuck before starting. The product data sheet gives the shank requirements.

How do I use self-feed bits safely?

Clamp the piece of wood, so that it does not turn with the bit. Keep a firm grip on the tool, because at the end of drilling the torque can wrench the tool out of your hands. Wear safety glasses and a dust mask for wood dust. Withdraw the bit from the hole when needed to clear the chips.

Which jobs use self-feed bits?

They are used in carpentry, joinery and building site work, for through holes in beams, boarding and wooden panels. They are chosen by carpenters, joiners and installers who need to drill wood with large diameters. For holes in metal or masonry, other types of bit are needed, with geometry suited to those materials.

What is the difference between the Extreme Tri Flute bit and an auger bit for wood?

The Extreme Tri Flute bit is a three-cutter model with a central screw tip, designed for large, deep holes in wood. Helical auger bits are classic wood bits, while mortising machine bits are used for joints. Choose the shape according to the hole required and the tool you have available.