Bosch Expert SelfCut Speed Spade Bit 12mm x 152mm

The Bosch Expert SelfCut Speed is a 12mm wood spade bit built for anyone who drills timber regularly and wants results without the faff. Whether you’re chasing cable routes through joists, boring out pipe runs, or working through stud walls, this bit pulls itself in cleanly and exits without the usual splintering drama. That self-feeding tip does exactly what it says: it threads into the wood and draws the bit forward, so you’re not forcing the drill and wearing your wrists out in the process.

The 152mm length gives you enough reach for most structural timber work without needing an extension. It’s a practical size that fits comfortably in tight spots like stud bays and loft voids where you’re often drilling at awkward angles with limited run-up. The 1/4 inch hex shank locks straight into quick-change chucks and standard three-jaw drill chucks alike, so there’s no messing about with adapters on site.

What Makes the Bosch Expert SelfCut Different from a Standard Spade Bit

Most flat bits work, but they can be slow to clear, and if you’re drilling multiple holes back to back, swarf builds up and the bit starts to bind. Bosch’s wave-shaped flute design on this 12mm wood spade bit addresses that directly. The curved geometry lifts chips out of the hole faster, which keeps the cutting edges cleaner and reduces heat build-up. Less heat means the bit stays sharper for longer, which matters when you’re putting it through thirty joists in a day.

Part of the Expert Series

The Expert range from Bosch sits above their standard line and is aimed squarely at professional use. The material quality and geometry tolerances are tighter, and you can feel that in the cut. It tracks straight, it doesn’t wander on entry, and the finish at the breakthrough point is noticeably cleaner than cheaper alternatives. For a 12mm wood spade bit at this price point, the performance is hard to argue with.

Suitable for softwood, hardwood, and engineered timber products. As with any spade bit, back the drill off slightly as the tip breaks through to keep the exit face tidy.