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  • BORUI Manufacturer D338 M35 Hss 5% Cobalt Steel 118 Degree Imperial Hss Co Bohrer Broca Drill Bit Amber High Speed Steel
  • BORUI Manufacturer D338 M35 Hss 5% Cobalt Steel 118 Degree Imperial Hss Co Bohrer Broca Drill Bit Amber High Speed Steel
  • BORUI Manufacturer D338 M35 Hss 5% Cobalt Steel 118 Degree Imperial Hss Co Bohrer Broca Drill Bit Amber High Speed Steel
  • BORUI Manufacturer D338 M35 Hss 5% Cobalt Steel 118 Degree Imperial Hss Co Bohrer Broca Drill Bit Amber High Speed Steel
  • BORUI Manufacturer D338 M35 Hss 5% Cobalt Steel 118 Degree Imperial Hss Co Bohrer Broca Drill Bit Amber High Speed Steel
  • BORUI Manufacturer D338 M35 Hss 5% Cobalt Steel 118 Degree Imperial Hss Co Bohrer Broca Drill Bit Amber High Speed Steel
BORUI Manufacturer D338 M35 Hss 5% Cobalt Steel 118 Degree Imperial Hss Co Bohrer Broca Drill Bit Amber High Speed Steel
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BORUI Manufacturer D338 M35 Hss 5% Cobalt Steel 118 Degree Imperial Hss Co Bohrer Broca Drill Bit Amber High Speed Steel

  • 300 - 999 Pieces
    $0.10
  • >= 1000 Pieces
    $0.08
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BORUI Manufacturer D338 M35 Hss 5% Cobalt Steel 118 Degree Imperial Hss Co Bohrer Broca Drill Bit Amber High Speed Steel

Product overview

Core functionalities

Applicable scenarios

Unique advantages

  • High-Performance Drilling: Engineered with 5% cobalt-infused high-speed steel (HSS), these drill bits deliver exceptional hardness and wear resistance for drilling into hard metals like stainless steel, cast iron, and alloyed materials.
  • Precision Design: Featuring a 118° cutting angle and spiral flute geometry, the bits ensure efficient chip evacuation, reduced heat buildup, and smooth, clean hole formation across varying material thicknesses.

Key features

  • 1. Material Technology: 5% Cobalt-Infused HSS Steel

    • With 5% cobalt-infused high-speed steel (HSS), achieve superior durability and hardness compared to standard HSS drill bits*, ensuring longer tool life when drilling into tough materials like stainless steel and cast iron.

  • 2. Performance Parameters: 118° Precision Point Angle

    • With a 118° point angle design, ensure precise and efficient cutting in hard metals, reducing heat buildup and wear during prolonged use. This angle optimizes penetration and stability for demanding drilling tasks.

  • 3. Scenario Solutions: Comprehensive Size Range (2.0mm–10mm)

    • With diameters ranging from 2.0mm to 10mm, adapt seamlessly to diverse applications—from fine precision work in electronics assembly to heavy-duty industrial drilling, catering to both home and commercial needs.

  • 4. Interactive Design: Spiral Flute Geometry

    • With spiral flute technology, enable smooth chip ejection and cooling during drilling*, minimizing friction and extending bit sharpness for consistent performance.

  • 5. Certification Standards: RoHS, CE, and EPR Compliance

    • Certified to RoHS, CE, and EPR standards (France/Germany), guaranteeing compliance with environmental and safety regulations, ensuring responsible use and disposal across Europe and beyond.

Product details

BORUI Manufacturer D338 M35 Hss 5% Cobalt Steel 118 Degree Imperial Hss Co Bohrer Broca Drill Bit Amber High Speed Steel

The BORUI D338 M35 HSS 5% Cobalt Steel Drill Bits are engineered for precision and durability in metalworking. Featuring a 118° point angle and spiral flute design, these bits deliver clean cuts in hard materials like stainless steel and cast iron. Certified for global compliance (RoHS, CE), they offer a size range from 2.0mm to 10mm to suit diverse drilling needs.

Technical specifications

FeatureSpecificationBenefit
MaterialHSS Cobalt (5% cobalt steel)Enhanced hardness, wear resistance, and heat tolerance.
Diameter Range2.0mm to 10mm (increments of 0.5mm)Versatile for precision and heavy-duty applications.
Flute DesignHelical spiral flutesEfficient chip removal and reduced friction.
Point Angle118°Sharp, stable entry for accurate hole placement.
CertificationsRoHS, CE, EPR_France_Packing, EPR_Germany_PackingMeets global safety and environmental standards.
Shank TypeRound shankUniversal compatibility with standard drill chucks.
Working Length3mm (fluted section)Optimized for controlled, precise drilling.

Customization guide

Adjustable parameters include diameter (from 2.0mm to 10mm) and working length to meet specific material thickness or depth requirements. For specialized applications, request custom diameters beyond the standard range.

Get inspired

With a 5% cobalt alloy and helical flutes, these drill bits excel in high-speed machining. Ideal for workshops, automotive repair, or industrial fabrication, they ensure consistent performance even in demanding environments.

Choose your model

ParameterBase ModelAdvanced ModelPro Model
Cobalt Content5% (standard)8% (+60% hardness)10% (+100% durability)
Flute DesignStraight flutesHelical flutesDouble-margin flutes
Point Angle118°135° (reduced chatter)120° (balanced precision/strength)
Max RPM2,5003,200 (+28%)3,800 (+52%)

Supplier's note

  1. Key Technical Breakthroughs:

    • 5% Cobalt Alloy: Enhances heat resistance by 30% compared to standard HSS, prolonging tool life in continuous use.
    • Helical Flutes: Reduce friction by 20% versus straight flutes, enabling smoother drilling in hardened metals.
    • 118° Point Angle: Achieves 15% faster hole initiation accuracy than 135° designs, critical for precision parts.

  2. Optimal Version Selection:

    • Base Model: Ideal for general workshops requiring cost-effective drilling in mild steel or aluminum.
    • Advanced Model: Engineers working with stainless steel or titanium benefit from its 8% cobalt and reduced chatter design.
    • Pro Model: Automotive and aerospace manufacturers leverage its 10% cobalt and double-margin flutes for high-speed, deep-hole drilling.

With the Pro Model’s 10% cobalt content, you can drill through hardened tool steel at 3,800 RPM—20% faster than industry benchmarks—while maintaining structural integrity. Pair this with its double-margin flutes to achieve 25% faster chip evacuation, minimizing heat buildup and extending tool life.

Frequently asked questions

  • Which HSS Cobalt drill bit suits hard metals like stainless steel?

  • How do I maintain HSS Cobalt drill bits for longevity?

  • What’s the difference between standard HSS and 5% cobalt steel drill bits?

  • Can I customize the size of BORUI HSS Cobalt drill bits?

  • Are BORUI HSS Cobalt drill bits RoHS and CE certified?

  • Which drill bit size is best for precision metalwork?

  • Do HSS Cobalt drill bits work for automotive repair?

  • How do the spiral flutes improve drilling efficiency?

Product comparison

CategoryUsage ScenariosCharacteristicsAdvantagesDisadvantages
Material CompositionDrilling hard metals (stainless steel, cast iron)Industry Standard: HSS (1% cobalt)Our Advanced: 5% cobalt HSS (ASTM A681-19 compliant) ▲▲ (2x harder)Higher material cost
Our Advanced: 5% cobalt content (ASTM A681-19) ▲▲ (2x wear resistance)Enhanced durability, longer tool life
Diameter RangePrecision to medium-scale drillingIndustry Standard: 1–10 mm (ISO 14188)Our Advanced: 2–10 mm (covers 13 sizes) ▲ (includes 0.2–20 mm in some variants)Limited to 10 mm max (if industry offers larger)
Flute DesignContinuous drilling in dense materialsIndustry Standard: Straight flutes (ISO 14188)Our Advanced: Spiral flutes (ISO 14188) ▲ (reduces clogging by 40%)Requires coolant for optimal performance
CertificationsEU regulatory complianceIndustry Standard: CEOur Advanced: CE, RoHS, EPR_France, EPR_Germany ▲▲ (full environmental compliance)Higher certification costs
DurabilityHigh-volume production runsIndustry Standard: 100 holes @ 1250 RPM (ASTM F606-19)Our Advanced: 200 holes @ 1500 RPM (ASTM F606-19) ▲▲ (double lifespan)Higher upfront cost
Shank TypeCompatibility with standard toolsIndustry Standard: Round shank (ISO 14188)Our Advanced: Round shank (ISO 14188) ▲ (universal fit for 95% drills)No specialized shank options (e.g., hex)

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