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Cobalt Step Twist Drill Bit – M35 High Speed Steel Straight Shank (3‑13 mm) is engineered for precision drilling in tough metals such as stainless steel, cast iron, and hardened alloys. Its cobalt‑reinforced core delivers exceptional strength, heat resistance, and long‑lasting performance, making it the ideal choice for professionals and serious hobbyists alike.
Product Overview
Designed with a step‑twist geometry, this drill bit offers smooth, accurate drilling with minimal vibration. The straight shank ensures a secure fit in standard drill chucks, while the 3‑13 mm size range covers a wide variety of drilling tasks from fine detail work to larger, heavy‑load applications.
Key Features
- High‑Quality Cobalt Core – 5% cobalt alloy provides superior hardness and heat tolerance, reducing wear and extending tool life.
- Step‑Twist Design – reduces cutting resistance and improves chip evacuation for cleaner, faster drilling.
- Versatile Size Range – 3 mm to 13 mm diameter options accommodate a broad spectrum of metal drilling needs.
- Straight Shank Construction – compatible with standard 3/8″ and 1/2″ drill chucks for easy handling.
- Heat‑Resistant Finish – heat‑treated surface resists cracking and maintains cutting edge integrity under high‑speed conditions.
- Precision Ground Edge – ensures accurate hole placement and smooth drilling surfaces.
Applications
Perfect for:
- Stainless steel fabrication and repair
- Cast iron drilling and machining
- High‑strength alloy work (e.g., titanium, hardened steel)
- Automotive, aerospace, and metalworking projects
- DIY metalworking and precision engineering tasks
Specifications
- Material: 5% Cobalt High Speed Steel (HSS)
- Shank: Straight, 1/2″ (12.7 mm) standard diameter
- Diameter Range: 3 mm – 13 mm (step increments)
- Length: 30 mm (adjustable to fit most drill sizes)
- Coating: None (heat‑treated for optimal performance)
- Weight: 0.05 kg (approx.)
Why Choose This Cobalt Step Twist Drill Bit?
When precision and durability are paramount, this M35 cobalt drill bit delivers unmatched performance. Its high‑speed steel construction resists deformation, while the step‑twist geometry ensures clean cuts even in the toughest metals. Whether you’re a professional machinist or a meticulous hobbyist, this drill bit will provide reliable results and a longer service life than standard steel options.
Price: $ 1.74