10pcs M35 Cobalt Drill Bits Set | For Stainless Steel & Metal | 1-3mm High-Speed Steel

This professional 10-piece set of HSS M35 Cobalt Drill Bits is designed for tackling tough materials like stainless steel and hardened metals. The 5% cobalt enhancement significantly increases heat an...
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Questions about this product
- Can I use these drill bits to drill through stainless steel and cast iron?
- Yes, these bits are specifically designed for tough metals like stainless steel, cast iron, and hardened steel. The 135-degree split point stops the tip from walking on hard, curved surfaces. They are ideal for precision metalworking, pilot holes, and automotive repairs.
- What makes these cobalt bits different from standard high-speed steel drill bits?
- These bits use M35 high-speed steel with 5% cobalt to achieve a high hardness of 65-68 HRC. A titanium coating also reduces friction and heat buildup during tough drilling tasks. This combination keeps the cutting edges sharp far longer than basic steel bits.
- What speed should I run these drill bits at when cutting metal?
- For a 2mm bit in steel, we recommend running your drill between 3000 and 5000 RPM. Because these bits are very thin, high speeds and light pressure prevent them from binding or snapping. Always let the self-centering tip do the cutting without forcing it.
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