M35 TiAlN Cobalt Countersink Drill Bit 90° Chamfer HSS-Co

Binoax M35 TiAlN Cobalt Countersink Drill Bit — Professional 90° Chamfer

Upgrade your drilling game with the Binoax M35 HSS-Co Countersink Drill Bit, engineered for precision chamfering and deburring on a wide range of materials. Built from premium M35 high-speed steel cobalt and coated with an industrial-grade TiAlN (Titanium Aluminum Nitride) finish, this bit delivers exceptional hardness (HRC89) and heat resistance — ideal for dry, high-speed cutting without the need for coolant.

Made in Mainland China.

Key Specifications

• Material: HSS-Co / M35 High-Speed Steel
• Coating: Industrial-Grade TiAlN
• Hardness: HRC89
• Chamfer Angle: 90°
• Shank: 1/4" Hex Shank (universal fit)
• Size Options: 1–4mm / 2–5mm / 5–10mm / 10–15mm / 15–20mm
• Certification: CE Certified
• Process: CNC & CBN Grinding for superior accuracy

Why Choose This Countersink Bit?

• 3× Longer Service Life: The TiAlN coating triples tool longevity compared to standard HSS materials (4241 / 6542 grades), making it a cost-effective professional choice.
• Extreme Heat Resistance: The TiAlN surface forms a protective Al₂O₃ layer during drilling, enabling sustained performance at high speeds — no coolant required.
• Clean, Burr-Free Results: 90° precision chamfer geometry combined with internal chip removal eliminates flying metal shavings and ensures smooth, clean holes every time.
• Versatile Material Compatibility: Works on aluminum, PVC board, insulation board, sheet metal, carbon steel, 304 stainless steel, and more.
• Universal Hex Shank: The 1/4" hex shank fits most standard drills and power drivers for quick, easy bit changes.

Ideal Applications

Perfect for metalworking, woodworking, fabrication, and DIY projects. Use it for creating clean countersink holes, chamfering edges, deburring drilled holes, and preparing surfaces for flush screws. Excellent for professional workshops and job-site use where dry cutting capability is essential.

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Learn more: OSHA guidance on hand and power tools

Frequently Asked Questions

Q: What materials can the M35 TiAlN countersink drill bit cut through?

A: This cobalt countersink bit is compatible with a wide range of materials including aluminum, PVC board, insulation board, sheet metal, carbon steel, and 304 stainless steel. Its M35 HSS-Co construction and TiAlN coating make it suitable for both ferrous and non-ferrous metals as well as plastics and composites.

Q: Do I need coolant when using this countersink drill bit?

A: No — the industrial-grade TiAlN coating provides outstanding high-temperature resistance, allowing the bit to be used for extended periods without coolant. This makes it especially convenient for aerial or fieldwork situations where adding a cooling water system is not practical.

Q: What shank size does this countersink bit use and will it fit my drill?

A: The bit features a standard 1/4" hex shank, which is universally compatible with most cordless drills, impact drivers, and drill presses that accept hex-shank accessories.

Q: What size options are available for this countersink drill bit?

A: This countersink bit is available in five size ranges: 1–4mm, 2–5mm, 5–10mm, 10–15mm, and 15–20mm, allowing you to select the perfect chamfer size for your specific application.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.