M35 HSS Drill Bits | Professional Set for Metal & Stainless Steel | High-Speed Drilling
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£4.99inc VAT
Engineered for demanding professionals, the SLUGB Cobalt M35 HSS Twist Drill Bit Set delivers exceptional durability and heat resistance for drilling hardened metals. Its premium cobalt high-speed ste...
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£4.99
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Questions about this product
- Will these drill bits actually cut through stainless steel?
- Yes, that's exactly what they're built for. The M35 cobalt steel handles stainless, hardened steel, and cast iron without losing its edge. They're a solid pick for fabrication and tough alloy work in a metal shop.
- How much heat can these cobalt bits take before they go dull?
- They hold up to roughly 600°C (1112°F), which is why they stay sharp drilling hard metal. Keep your speed moderate and use a little cutting fluid on stainless to push that lifespan further. Pushing too hard or running dry will still burn any bit.
- Do I need to center punch before drilling with these?
- No, the 135-degree split point starts on its own without wandering. That saves you the center-punch step and gives cleaner, more accurate holes. Just line up the tip and let the bit bite.
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