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2026-01-28Wood is a type of material that is able to forgive a lot. When drilling, however, it usually quickly becomes apparent whether you have chosen the right drill bit and chuck to get the desired effect. Below we have prepared A practical guide to spiral, vane and auger bits - With simple selection rules, work settings and a short download errors → immediate correction. Also included at the end are sample SKUs from the GTX (NEO TOOLS / GRAPHITE) range and the most common questions about wood drill bits. Enjoy your reading!
What drill bit for what task?
Spiral wood drill bits
Most recommended for precision through-holes and blind holes in solid wood, plywood and veneered panels. The centering spike guides the drill bit in alignment and reduces its "wandering" at the start, while the spiral grooves efficiently pull out chips.
Typical diameters for the spiral drill: 3-30 mm. Working lengths: standard and "long" (e.g. 150-180 mm for deeper holes).
When to choose them? When a clean edge and precise dimensions count (furniture, joints, pin holes).
Blade drills
Recommended for quick mounting/through holes in structures and installations. They work more aggressively, so for visible surfaces, it's a good idea to lay a primer underneath to reduce breakouts in the wood.
Shank: mostly ¼″ HEX (secure attachment in the screwdriver and quick change of accessories in the screwdriver).
Typical diameters for the paddle drill: 10-38 mm.
When to choose them? When the priority is speed and flight in the board/beam, and the edges do not have to be perfect.
Wood augers
Reach them for deep holes in beams and scantlings. The screw tip guides the tool itself, and the wide single groove effectively pulls out long chips.
Shank: often hexagonal (stable in 3-jaw drill chucks).
Typical diameters: 6-30 mm. Working lengths: long/extra-long (e.g. 360 mm).
When to choose them? When you need to go deep and maintain control of chip discharge.
Shank: cylindrical, hexagonal or ¼″ HEX?
- Cylindrical (cylindrical) - the most axial and precise in a 3-jaw chuck; preferred for spiral drills and wherever you expect accuracy.
- HEX (hexagonal) - de facto cylindrical with "beveled" edges: stable grip in 3-jaw chuck; often used in augers.
- ¼″ HEX (quick-change) - offering the fastest change, great torque transfer in a screwdriver; standard in paddle shifters, increasingly used in spiral shifters as well.
Work settings: speed and feed rate
- Spiral: medium speed, even feed. For harder material or larger diameters, lower the RPM and keep control on axis.
- Auger: lower RPMs and controlled feed - the screw tip should work well on its own - no need to push; use frequent breaks to change direction of rotation for excavated material removal.
- Vane: high speed possible, but reduce rpm before punching to reduce breakouts in the material at the exit.
Tips to start (clean edge, smaller breakouts)
- Starting point: mark the center; spiral drills and augers themselves should hold the axis, but a precise point works well for particle board.
- Backing up from underneath: at the through holes, back up the board and you will see noticeably fewer tears in the material.
- Deep drilling: back off the drill every few seconds to remove chips and lower the temperature (important especially with augers and long spiral drills).
Errors → quick fix (download)
- The drill bit is slipping at the start → you may have chosen a drill bit not designed for wood. Use a centering spike or gently spot drill into soft wood - all wood drills are equipped with a spike/pilot so slipping on the material should not occur.
- Breakouts at the exit → necessary primer from underneath; for cleaner edges, choose a spiral drill instead of a spade drill.
- Jamming/overheating at deep holes → frequently back off the drill bit to clear chips - use lower RPM at augers.
Short selection table
|
Task / material |
Best type |
Grab |
Pros |
What to watch out for |
|
Precision furniture holes, dowels, veneer |
Spiral drills |
Cylindrical / ¼″ HEX |
clean edge, well-maintained axis |
slow down on exit |
|
High-speed throughput in construction |
Blade drills |
¼″ HEX |
fast, cheap, large diameters |
breakouts - remember the undercoating and slower output speeds |
|
Deep holes in the beams |
Swidry |
HEX |
long holes, great chip ejection |
lower RPM, do not press the drill bit |
Health, safety and quality of work
- Fixing the workpiece: use clamps/vise-grips, be sure to have a stable countertop; and in mobile work, hold the material so that exit is done with support.
- Protection: don't forget goggles, with augers and shovels there is a risk of long chips/splinters.
- Check for perpendicularity: guide the tool straight; in slabs and veneers, consider a guide.
- Clean drill bits: resins and dust deteriorate cooling and sharpness - clean accessory grooves regularly.
Examples of products from the GTX range (we make it easy to choose)
- Spiral wood drills (cylindrical / ¼″ HEX):
54T555 (extra long, 400 mm), 54T565 (long, 250 mm), 54T576 (¼″ HEX shank). - Blade drills for wood (¼″ HEX):
57-212 - range for installation/construction work. - Wood augers (HEX):
57-352 - single groove, screw tip; for deep holes.
Where to buy
Go to fixero.com and choose according to your needs: spiral wood drill bits, ¼″ HEX spade drill bits, augers. Make your choice easier by filtering for diameter, length or shank type. For more tips and advice on power tool accessories, visit our GTX Academy.
