LEKOMESH Cobalt Step Drill Bit - 4-22mm Four Spiral Flute Step Drill Bit M35 with Impact Ready Unibit for Stainless Steel Metal Aluminium Copper Wood Plastic
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- Premium M35 Cobalt Steel Crafted from high-performance HSS M35 with 5% cobalt, hardened to 66-69 HRC for superior heat wear resistance, extended durability, and unmatched chip control in tough materials like stainless steel.
- 10-Step Versatility (4-22mm) Precision-ground 4-flute design covers 10 common sizes (4mm to 22mm) in one bit, ideal for multi-diameter drilling on metal, wood, and plastics without tool changes.
- 3X Faster Cutting, Lower Cost Hole Engineered for high-speed drilling (3x faster than standard bits), reducing long-term costs despite the premium price perfect for high-efficiency workshops.
- Triple-Grind Edge + TiAlN Coating Triple-edge grinding enhances sharpness, while 89HRC TiAlN coating minimizes friction and heat buildup, excelling in stainless steel, sheet metal, and hard alloys.
- Recommended Machine Compatible with corded cordless drills and bench drills (2000-5000 RPM; reduce to 1000 RPM for soft materials like aluminum). For extended lifespan, use cutting oil water cooling during continuous drilling never use hammer impact modes. For precise depth control, wrap tape around the bit as a visual guide.
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