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HSS Titanium Step Drill Bit Set | Wood & Metal Hole Cutter
HSS Titanium Step Drill Bit Set | Wood & Metal Hole Cutter
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RDDSPON HSS Titanium-Coated Step Drill Bit Set
Take the guesswork out of drilling with the RDDSPON Straight Groove Step Drill Bit Set — a versatile collection of high-speed steel (HSS) step drill bits engineered for clean, precise, perfectly round holes in steel, brass, aluminum, wood, plastic, and more. Whether you're a seasoned tradesperson or a weekend DIY enthusiast, these titanium-coated bits deliver professional-grade performance every time.
Made in Mainland China.
Why Choose This Step Drill Bit Set?
- Premium HSS Construction: Crafted from heat-treated High Speed Steel for exceptional hardness, long-lasting sharpness, and superior durability across demanding materials.
- Titanium Coating: The gold titanium nitride (TiN) coating dramatically reduces friction and heat buildup during drilling, extending bit life and keeping cuts smooth and accurate.
- Straight Groove Design: Efficient chip evacuation channels prevent clogging, keeping your work surface clean and your bit running cool.
- Multi-Size in One Bit: Each step bit replaces a whole set of individual drill bits — step up or step down to your exact hole size without swapping tools.
- Universal 6.35mm Hex Shank: Compatible with pistol drills, hand drills, cordless drills, and bench drills — fits most standard drill chucks instantly.
- Deburring Built In: Each step naturally deburrs and chamfers as you drill, leaving clean, finished edges without extra tools.
Available Models & Sizes
| Model | Size Range | Steps | Length |
|---|---|---|---|
| 3–12mm | 3, 4, 5, 6, 7, 8, 9, 10, 11, 12mm | 10 Steps | ~78mm |
| 4–12mm | 4, 6, 8, 10, 12mm | 5 Steps | ~67mm |
| 4–20mm | 4, 6, 8, 10, 12, 14, 16, 18, 20mm | 9 Steps | ~77mm |
| 4–32mm | 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32mm | 15 Steps | ~104mm |
Package Options
- Individual bits: 3–12, 4–12, 4–20, or 4–32
- 3-in-1 Set: 3–12, 4–12, 4–20
- 3-in-1 Set: 4–12, 4–20, 4–32 (standard or boxed)
Compatible Applications
- Drilling, deburring, chamfering, and expanding holes in metal sheet, wood panels, plastic boards, and more
- Electrical panels, HVAC sheet metal, plumbing fixtures, woodworking projects, automotive bodywork
- Works with: Pistol drill, Hand drill, Cordless drill, Bench drill
Technical Specifications
- Material: High Speed Steel (HSS)
- Coating: Titanium Nitride (TiN)
- Shank: Hexagonal, 6.35mm diameter
- Groove Type: Straight groove
- Origin: Made in Mainland China
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For safe power tool operation guidelines, visit the OSHA Power Tools Safety Resource. For general tool and hardware safety standards, see CPSC Power Tool Safety.
Frequently Asked Questions
Q: What materials can the HSS titanium step drill bit cut through?
A: These HSS titanium-coated step drill bits are designed to cut through a wide range of materials including steel, stainless steel, brass, aluminum, copper, wood, MDF, plastic, and fiberglass sheet. The titanium nitride coating minimizes friction and heat, making them highly effective on both metal and non-metal surfaces.
Q: Which drill is compatible with this step drill bit set?
A: The 6.35mm (1/4") hexagonal shank fits virtually all standard drill chucks, making these bits compatible with pistol drills, cordless hand drills, charging/battery drills, and bench-mounted drill presses.
Q: How do I choose the right model for my project?
A: Choose based on the hole sizes you need most. The 3–12mm model is ideal for smaller, precision holes in increments of 1mm. The 4–12mm and 4–20mm models cover mid-range holes in 2mm increments, while the 4–32mm model is best for large holes up to 32mm, progressing in 2mm steps — perfect for conduit, cable glands, or larger fittings.
Q: Does the titanium coating wear off over time?
A: The titanium nitride (TiN) coating is applied through a heat-treatment bonding process, so it bonds tightly to the HSS base. With proper use — avoiding excessive force and drilling at recommended speeds — the coating maintains excellent performance over extended use. Avoid using the bits on very hard alloys beyond their rated capacity to preserve coating integrity.
Q: Can I use these bits for deburring or chamfering?
A: Yes! One of the key advantages of a step drill bit is its built-in deburring capability. As you drill through sheet metal or thin materials, the stepped profile automatically cleans and chamfers the edge of the hole, leaving a smooth, finished opening without the need for a separate deburring tool.
