3PCS HSS Step Drill Bit Set — Titanium Coated Cone Drill Bits with 1/4" Hex Shank
Upgrade your drilling efficiency with this professional-grade 3-piece step drill bit set. Engineered from premium high-speed steel (HSS) and finished with a titanium coating, these cone-shaped drill bits allow you to drill multiple hole sizes with just one bit — no need to switch between different drill bits mid-project.
Each bit features precision-ground cutting edges and laser-etched size markings, so you always know exactly which diameter you're drilling. The straight flute design ensures smooth chip evacuation, preventing jamming and delivering clean, burr-free holes in a single pass.
What's in the Box
表格
| Size Range | Steps | Step Width | Shank Length | Total Length |
|---|
| 4–12 mm | 13 steps (4, 5, 6, 7, 8, 9, 10, 11, 12 mm) | 5 mm | 21 mm | 43 mm |
| 4–20 mm | 9 steps (4, 6, 8, 10, 12, 14, 16, 18, 20 mm) | 5 mm | 21 mm | 54 mm |
| 4–32 mm | 15 steps (4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32 mm) | 5 mm | 24 mm | 78 mm |
Why Choose This Step Drill Set?
1. Premium HSS Construction with Titanium CoatingMade from high-speed steel (HSS) with a bit hardness of 62–65 HRC, these bits are built to withstand the heat and friction of high-speed drilling. The titanium nitride coating reduces friction by up to 40%, keeps the cutting edge cooler, and significantly extends tool life compared to uncoated bits.
2. 1/4" Quick-Change Hex ShankThe standard 1/4" hex shank works with almost any cordless drill, impact driver, or drill press with a quick-change chuck. The hex shape prevents slipping and ensures a secure grip — no more round-shank bits spinning in the chuck.
3. Straight Flute for Clean Chip RemovalThe straight flute design allows chips to flow out smoothly during drilling, reducing heat buildup and preventing the bit from jamming in the hole. This means cleaner holes, faster drilling, and less wear on both the bit and your drill.
4. Laser-Etched Size MarkingsEvery step is clearly marked with its diameter number, laser-etched directly into the bit surface so it won't wear off over time. You can instantly read which size you're on without stopping to measure.
5. Self-Centering Tip — No WalkingThe split-point center tip starts drilling immediately on contact, "walking" or skating across smooth metal surfaces. This gives you precise, accurate holes every time, even on curved or slightly uneven workpieces.
Applications & Compatible Materials
This versatile step drill set works on a wide range of sheet materials up to 4 mm thick:
Metal: Steel sheet, stainless steel (thin gauge), brass, copper, aluminum
Wood: Plywood, MDF, softwood, hardwood
Plastic: PVC, acrylic, fiberglass, composite panels
Common uses: Electrical conduit holes, plumbing pipe openings, sheet metal fabrication, furniture assembly, HVAC installation, automotive repair, DIY home projects.
Technical Specifications
表格
| Item | Detail |
|---|
| Material | High Speed Steel (HSS) |
| Coating | Titanium (TiN) Coated |
| Bit Hardness | 62–65 HRC |
| Shank Type | 1/4" Hex Quick-Change |
| Flute Type | Straight Flute |
| Step Width | 5 mm per step |
| Quantity | 3 pcs per set |
| Size Range | 4–12 mm / 4–20 mm / 4–32 mm |
| Total Length | 43 mm / 54 mm / 78 mm |
Recommended Usage Tips
Use a cutting fluid when drilling metal for best results and longer bit life.
Start at a low speed, then increase gradually as the bit enters the material.
Do not force the bit — let the cutting edges do the work. Apply steady, moderate pressure.
For stainless steel, reduce speed and use plenty of lubricant.
Clear chips frequently by pulling the bit out of the hole periodically.
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