HSS Step Drill Bit

Professional HSS Step Drill Bit - High-Performance Multi-Diameter Drilling Solution

At Danyang Ebuy Tools Co., Ltd., our HSS Step Drill Bit delivers enterprise-grade precision for your most demanding applications. Engineered with High-Speed Steel and featuring a self-centering 118° split-point geometry, this conical cutting tool eliminates tool changes while drilling multiple diameters in one operation. With our 77,000 square meter manufacturing facility and 319 skilled employees, we produce over 150,000 pieces daily, ensuring reliable supply for your projects. Our product achieves 63-67 HRC hardness and includes TiN coating for reduced friction to <0.4 coefficient.

Our Factory

What is an HSS Step Drill Bit?

A product is a specialized conical cutting tool manufactured from High-Speed Steel with a unique staircase profile. Unlike traditional twist drills, this innovative design allows you to drill holes of multiple, incrementally increasing diameters using just one bit.

The stepped geometry features a self-centering split-point that prevents "walking" on your workpiece. You won't need center punching anymore. This design integrates drilling, chamfering, and deburring into one smooth downstroke, dramatically improving your productivity.

Each step creates a precise diameter increment, making it perfect for sheet metal work, electrical installations, and HVAC applications where accuracy matters most.

Our Certificate

Key Applications in Professional Industries

HVAC and Ductwork Fabrication

Your HVAC projects demand precision. Our HSS Step Drill Bit creates perfectly round access holes in galvanized steel ducts without the tearing or triangular holes that standard twist drills often cause. The stepped geometry prevents sheet metal distortion, ensuring clean, professional results every time.

Electrical Panel Assembly

When you're working on electrical installations, precision is non-negotiable. Electricians rely on our step drill bits for creating exact cable gland knockouts in steel junction boxes and polycarbonate enclosures. The stepped depth control creates clean, burr-free openings essential for watertight seals.

Automotive Construction and Repair

For automotive applications requiring superior durability, our Cobalt-alloyed (M35) variants penetrate hardened steel and stainless steel sheets without work-hardening the material. Whether you're modifying chassis, firewalls, or installing sensors, these bits won't snap under lateral stress.

Technical Specifications

Parameter	Specification
Material	High-Speed Steel (M2, M35 Cobalt, M42)
Hardness	63-67 HRC
Tip Angle	118° or 135° Split Point (DIN 1412 C)
Coating Options	TiN, TiAlN
Surface Hardness	>2500 HV (coated)
Friction Coefficient	<0.4 (with coating)
Flute Design	Straight or Spiral
Standards	ISO/ANSI Concentricity Compliant

Production Process

Superior Performance Features

Self-Centering Design

The split-point geometry eliminates the need for center punching. Your bit starts precisely where you position it, preventing costly mistakes and material waste.

Multi-Diameter Capability

Each bit replaces multiple standard drills. You can create various hole sizes without stopping to change tools, significantly reducing your project time.

Exceptional Durability

Our High-Speed Steel construction with optional Cobalt alloying provides superior heat resistance. The bits maintain their edge even when working with challenging materials like stainless steel.

Clean, Burr-Free Holes

The stepped design automatically deburs holes during drilling. You'll save time on secondary finishing operations while achieving professional results.

Exhibition

Quality Manufacturing Process

Our advanced 77,000 square meter office guarantees reliable quality. Each bit experiences thorough testing amid generation. We screen each fabricating step to keep up the tight resiliences your applications demand.

Our Investigate & Advancement office ceaselessly moves forward our plans. We can too create customized arrangements to meet your particular requirements.

Quality control incorporates pre-shipment assessments and secure bundling to guarantee your bits arrive in idealize condition.

Packaging

Frequently Asked Questions

Q: What materials can I penetrate with the products?

A: Our step bore bits work perfectly with sheet metal, aluminum, mellow steel, stainless steel (with M35 Cobalt variations), plastic, and wood. They're particularly planned for materials up to 1/4" thick.

Q: How do I select the right step bore bit size?

A: Select based on your biggest required gap breadth. Our bits are checked with each step estimate, permitting you to halt at your wanted distance across. Consider the fabric thickness and your penetrating equipment's capabilities.

Q: What penetrating speed ought to I use?

A: For steel materials, utilize 300-500 RPM. For aluminum, 800-1000 RPM works well. Continuously utilize cutting liquid for stainless steel applications and decrease speed to anticipate overheating.

Q: How long do these bits regularly last?

A: With appropriate utilize and support, our items can bore hundreds of gaps. Life expectancy depends on fabric sort, penetrating parameters, and support. Cobalt variations final longer in requesting applications.

Q: Can these bits be resharpened?

A: Yes, proficient resharpening can expand bit life. Be that as it may, keeping up the exact step geometry requires specialized gear. We suggest substitution when execution corrupts significantly.

Q: Do you offer custom step configurations?

A: Completely. Our R&D group can plan custom step designs, coatings, and sizes to coordinate your particular applications. Contact us to examine your prerequisites.

Contact Us

Ready to improve your drilling efficiency with HSS Step Drill Bit? Contact us at [email protected] for pricing and custom solutions.