Bosch Expert SelfCut Speed Spade Bit 20mm x 152mm (1 pcs)
£3.57£4.28 EX VATINC VAT
Bosch Expert SelfCut Speed 20mm spade bit with self-feeding thread and wave-shaped flutes for fast, clean holes in wood. 152mm length with 1/4 inch hex shank. Suits electricians, carpenters, and general site use.
The Bosch Expert SelfCut Speed spade bit in 20mm is one of those bits you reach for when you need a clean hole quickly and don’t want the faff. If you’ve ever used a cheap spade bit and ended up fighting it halfway through a joist, you’ll understand why the design here matters. The bosch 20mm spade bit pulls itself into the timber using a self-feeding threaded tip, which means less pressure required from you and a straighter entry from the start.
The tip technology is the headline feature. That self-feeding thread acts like a wood screw at the point, drawing the bit forward as it turns. You’re not leaning into the drill to force progress — the bit does the work. This makes a real difference when you’re up a ladder, drilling at an angle, or working in tight spots where pushing hard isn’t an option.
What Makes the Bosch Expert SelfCut Speed Stand Out
The wave-shaped spade design isn’t just for show. Those curved flutes clear chips out of the hole as you go, which keeps the bit from binding and the hole from tearing. You get a cleaner exit hole too, which matters when cables or pipes are passing through and need a snug, tidy fit rather than a ragged mess.
At 152mm total length, this bit handles standard stud walls and joists without extension bars getting involved. The 1/4 inch hex shank fits both three-jaw drill chucks and hex quick-release chucks, so it works in whatever you’ve got on the belt.
Who Uses This Bit
Electricians running cables through timber frames, plumbers chasing through joists, carpenters drilling out for ironmongery — this is a workhorse bit for anyone drilling repetitive holes in wood on site. It’s equally at home for first-fix electrical work or cabinet installation where speed and accuracy both count. The Expert range sits above Bosch’s standard line, and at this size and length the difference is noticeable in how it performs through hardwood versus the budget alternatives.
For a single 20mm hole or a full day of them, this spade bit earns its place in the bag.
Pro Tip: When using the self-feeding thread on thin sheet timber or ply, ease off the trigger pressure as the tip breaks through the far face — the self-feed can pull the bit through faster than expected and split the surface on exit.
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