Suitable for: mild steel, iron, copper, magnesium, wood and plastic (not recommended for aluminium) Recommended for: Regular use by professionals or DIY enthusiasts looking for a longer lasting metal drill bit that won’t break the bank. HSS Titanium Nitride (TiN) Coated Drill Bits – Engineered for an Extended Life Should be used at slower speeds to reduce heat build up (which dulls the drill bit faster).Not suitable for hardened steel, alloys or stainless steel (See Cobalt below).Designed for general purpose and occasional use.Suitable for: mild steel, iron, copper, aluminium, magnesium, wood and plastic Should be considered disposable when compared to TiN and Cobalt drill bits. Recommended for: Occasional day-to-day use on softer metals and materials. HSS Jobber Drill Bits – Engineered for General Purpose Use HSS and Cobalt each have their own pro’s and con’s which we’ve listed below. You should never use Carbon-Steel bits on metal, they will blunt quickly or snap under the pressure. Metal drill bits come in two main types, High-Speed Steel (HSS) and Cobalt. Both of these brands are respected by professionals and DIY enthusiast for their superior quality, performance and longevity compared to others available in the market. This is because we believe that quality matters. When browsing our site, you’ll see that we only sell the Dormer and Alpen drill bits. We’ve also included some top tips on how to drill into metal effectively. Here’s our guide for choosing the correct drill bit when drilling into metal, including the pros and cons of each type.
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