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HSS Step Spiral Cone Drill Bits
1. HSS 4241 with titanium coating for strength and longevity
2. This set of step drill bits are durable and not easily broken
3. Two-Flute Design for smoother cutting
4. Triangle shank make more stable clamping
5. It is very suitable for using to cut holes in a variety of materials including steel, brass, wood, plastic, etc
HSS Step Spiral Cone Drill Bits - Professional Grade Cutting Tools
Danyang Ebuy Tools' HSS Step Spiral Cone Drill Bits deliver exceptional performance through advanced engineering. Our cutting tools feature high-speed steel construction with hardness levels of 63–68 HRC and reduce axial operating force by up to 30% compared to straight flutes. With concentricity tolerances under 0.05mm runout and our factory's daily output of 150,000 pieces, you get precision tools backed by robust manufacturing capabilities. These spiral-designed bits handle multiple hole sizes efficiently while minimizing vibration and maximizing chip evacuation for superior results.
Our Factory
Advanced Engineering for Superior Performance
Our step drill bits incorporate helical flute geometry that creates a shearing cutting action rather than gouging. This design significantly reduces cutting resistance and vibration during operation. The automatic deburring effect and self-centering capability eliminate the need for pilot punches.
The spiral cone design maximizes chip evacuation rates, preventing work hardening in sensitive materials. This makes them particularly effective for stainless steel and thin-gauge sheet metals where conventional bits often struggle.
Our Certificate
Technical Specifications
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Feature
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Specification
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Material Grade
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M2, M35 Cobalt (5%), M42 Cobalt (8%)
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Hardness Range
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63-68 HRC
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Surface Coatings
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TiN, TiAlN, Black Oxide
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Coating Hardness
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Up to 3000 HV
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Runout Tolerance
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<0.05mm
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Force Reduction
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30% vs straight flutes
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Standard Compliance
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DIN 1412
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Production Process
Key Applications Across Industries
HVAC and Sheet Metal Fabrication
Perfect for drilling vibration-free holes in galvanized steel ducts and aluminum siding. The spiral action ensures clean entry and exit without deforming sheet material.
Electrical Panel Assembly
Essential for creating varied knockout sizes from PG7 through PG48 in steel junction boxes. You can complete complex panel work without damaging internal components or requiring multiple hole saws.
Automotive and Aerospace Maintenance
These bits excel at drilling out spot welds and enlarging mounting points in chassis and cowlings. The spiral design handles interrupted cuts in multi-layer automotive steel better than standard twist drills, reducing grabbing risks.
Our Exhibition
Material Composition and Durability
Our bits use carefully selected high-speed steel substrates. Standard M2 grade works well for general steels, while M35 with 5% cobalt and M42 with 8% cobalt handle high-tensile alloys effectively.
Surface treatments include Titanium Nitride and Titanium Aluminum Nitride coatings. These coatings increase surface hardness and reduce friction coefficients for extended tool life.
The double or triple spiral flute design increases effective cutting edge length per rotation. This innovation significantly improves cutting efficiency while maintaining precision.
Quality Assurance Process
Metallurgical Testing
We perform spectrographic analysis to verify tungsten, molybdenum, and cobalt percentages. This ensures each HSS Step Spiral Cone Drill Bits meets specified grade requirements.
Precision Measurement
Laser micrometer testing confirms concentricity and runout specifications. We maintain strict tolerances to prevent chatter marks and oversized holes.
Strength Validation
Torque and torsion stress testing checks shank-to-bit transition strength. This prevents shearing under high torque conditions, especially on hex-shank models.
Coating Quality
Scratch testing approves coating attachment to guarantee TiN or TiAlN coatings stay intaglio beneath warm stress.
Our Packaging
Frequently Asked Questions
Q: What preferences do winding woodwinds offer over straight woodwind designs?
A: Winding woodwinds give smoother cutting activity, quicker chip clearing, and altogether diminished vibration. This comes about in cleaner gaps and longer instrument life.
Q: Can these bits successfully penetrate stainless steel?
A: Yes, but utilize HSS-Co (M35 Cobalt) review for best comes about. Continuously work at moo RPM with cutting liquid to avoid untimely dulling.
Q: What's the most extreme fabric thickness these bits can handle?
A: Fabric thickness ought to not surpass person step tallness, regularly 4-5mm, to guarantee total gap distance across achievement.
Q: How ought to I keep up these penetrate bits?
A: Utilize oil amid operation to avoid overheating. Whereas step honing requires specialized gear, you can touch up part point tips. Substitution regularly demonstrates more cost-effective once steps dull.
Q: Why do bits now and then break at the shank?
A: Breakage ordinarily comes about from intemperate side-load weight or sticking. Keep up opposite points and let winding edges shear fabric or maybe than constraining nourish rates.
Q: What speeds work best for diverse materials?
A: Utilize lower RPMs for harder materials like stainless steel. Begin conservatively and increment speed steadily whereas checking warm buildup and chip formation.
At Danyang Ebuy Instruments, our products represent a long time of building skill combined with advanced fabricating capabilities. You get instruments that convey steady execution over requesting applications whereas diminishing your by and large tooling costs through moved forward effectiveness and life span.
Contact Us
Ready to upgrade your drilling operations with HSS Step Spiral Cone Drill Bits? Contact our team at [email protected] for custom solutions and bulk pricing options.
