Learning to drill angled holes accurately opens the door to stronger joints, neater hardware installations and cleaner woodworking projects. With the right setup, an angled hole is no harder than a straight one.
Why Angled Holes Are Tricky
A drill bit naturally wants to follow the path of least resistance. When you tip the bit off vertical, the tip tends to skate across the surface before it bites, and the flutes can pull the bit off your intended line. The steeper the angle, the more pronounced this drift becomes. The solution is to control the bit before it ever starts cutting.
Start With a Guide
The single biggest improvement you can make is to give the bit something to lean against. A drilling jig, a pre-drilled guide block, or even a scrap of wood cut to your target angle will keep the bit tracking true from the first rotation. Clamp the guide firmly so it cannot shift under pressure.
- Guide block: Cut a block on a mitre saw to your exact angle and drill through it to steer the bit.
- Doweling jig: Adjustable jigs hold the bit at a fixed angle and depth for repeatable results.
- Drill press table: Tilt the table or use an angle vice for precision in the shop.
Establish the Entry Point First
Begin the hole with the bit held vertically, just enough to score a small starter divot at your mark. Then gradually tip the drill over to your target angle as the bit deepens. This two-stage approach prevents the skating that ruins so many angled holes. A brad-point or auger bit, with its centring spur, makes this even easier in wood.
Keep Speed and Pressure Steady
Run the drill at a moderate speed and let the bit do the work. Forcing an angled bit encourages flexing and wandering, especially in hardwood or metal. Ease off as you approach the far side to avoid blow-out, and back the bit out periodically to clear chips.
- Moderate RPM: Too fast overheats the tip; too slow can grab.
- Light pressure: Let sharp flutes cut rather than pushing hard.
- Clear the chips: Peck-drill deeper holes to keep the flutes free.
Choosing the Right Bit
Bit selection matters as much as technique. For angled holes in timber, a quality American-made wood auger or brad-point bit gives the cleanest entry and the best chip clearance. For metal, a sharp twist drill and a centre-punched start help the bit hold its line. Matching the bit to the material is the foundation of an accurate angled hole.