Bosch Professional cobalt drill bits represent precision German engineering at its finest, delivering exceptional performance when drilling through the toughest materials. Specially alloyed with cobalt, these premium drill bits maintain their hardness even at high temperatures, making them the go-to choice for tradesmen and professionals who regularly work with stainless steel, cast iron, and other hard metals. The distinctive gold-coloured finish isn't just for show – it's a mark of superior heat resistance and extended service life that sets Bosch Professional apart in demanding workshop environments.

Whether you're a fabricator working with metal day in and day out, or a general tradesman who needs reliable performance across diverse materials, Bosch Professional's cobalt drill bit range offers the durability and precision that professional applications demand. Each bit is manufactured to exacting standards, ensuring clean, accurate holes and significantly reduced drill walk, even on curved or angled surfaces.

Why Choose Bosch Professional?

Superior Cobalt Alloy Construction: Bosch Professional cobalt drill bits maintain cutting edge hardness at temperatures up to 600°C, outlasting standard HSS bits by up to five times when drilling hard metals
Precision Ground Tips: 135-degree split point design reduces walking and ensures accurate hole positioning without centre punching, saving time on every drilling operation
Professional-Grade Performance: Engineered specifically for metalworking professionals, delivering consistent results in stainless steel, cast iron, titanium, and other challenging materials
German Engineering Excellence: Bosch Professional's rigorous quality control and manufacturing standards ensure each bit meets the demands of daily professional use
Optimised Flute Design: Enhanced chip removal prevents clogging and overheating, extending bit life and improving drilling speed

Popular Bosch Professional Products

Bosch Professional offers cobalt drill bits in comprehensive sets and individual sizes to suit every metalworking requirement. Their popular 19-piece cobalt bit sets provide complete coverage from 1mm to 10mm, ideal for fully stocking your workshop or van. Individual bits are available in both jobber length and stub length formats, with the latter offering enhanced rigidity for precision engineering work. All Bosch Professional cobalt bits feature cylindrical shanks compatible with standard drill chucks, whilst their premium ranges include reduced shank options for larger diameters.

Frequently Asked Questions

What materials can Bosch Professional cobalt drill bits cut through?

Bosch Professional cobalt drill bits excel at drilling stainless steel, cast iron, hardened steel, titanium, and other tough alloys. They'll also perform exceptionally well in standard mild steel, aluminium, and copper, though their premium properties make them most cost-effective for harder materials where standard HSS bits struggle.

How do cobalt drill bits differ from standard HSS bits?

Cobalt drill bits contain 5-8% cobalt alloy, making them significantly harder and more heat-resistant than standard high-speed steel (HSS) bits. This means they stay sharper for longer, can operate at higher speeds, and won't lose their temper when drilling generates substantial heat – essential when working with hard metals.

Can I use Bosch Professional cobalt bits in a standard drill?

Absolutely. Bosch Professional cobalt drill bits work perfectly in any standard drill – whether corded, cordless, or pillar drill. For best results with hard materials, use a powerful drill with variable speed control to optimise your drilling speed, and always use appropriate cutting fluid to maximise bit life.