15-Piece M35 Cobalt Drill Bit Set, Metric 1.5-10mm for Hard Metals
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- TRUE M35 GRADE COBALT STEEL: Manufactured from premium High-Speed Steel containing 5% Cobalt (HSS-Co), these bits are heat-hardened to cut through tough abrasive materials. They offer significantly higher heat resistance and wear durability compared to standard HSS bits, making them the ultimate choice for drilling into stainless steel, cast iron, and titanium alloys.
- PRECISION 135° SPLIT POINT: Equipped with a 135-degree self-centering split point, these bits bite into the material immediately upon contact. This active cutting tip prevents "walking" or wandering across the work surface and eliminates the need for a pre-punch pilot hole, ensuring accurate and clean starts every time.
- FULLY GROUND & EFFICIENT: Unlike roll-forged alternatives, our bits are fully ground for precise dimension accuracy and concentricity. The precision-engineered dual twist flute design ensures rapid chip removal, effectively reducing friction and heat buildup for a smoother, cooler drilling process.
- 15PC METRIC SIZE COVERAGE: This comprehensive metric set includes 15 essential sizes: 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 8, 9, and 10mm. It is a versatile kit suitable for a wide range of projects in metalworking, automotive repair, and general DIY on wood, plastic, aluminum, and hard metals.
- HEAVY-DUTY INDEXED CASE: The bits are housed in a rugged, impact-resistant ABS plastic case with rubberized corners for extra protection. The case features a folding design with clearly marked size indexes (raised lettering) for easy identification, keeping your tools organized, secure, and ready for transport to any job site.
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Select a product to estimate shipping.M35 Cobalt: Engineered for Stainless Steel
Witness the power of True M35 Cobalt Steel. Our 5% Cobalt alloy maintains hardness even at high temperatures. As shown, it penetrates thick stainless steel with smooth chip evacuation and minimal heat—perfect for your toughest metalworking projects.
Comprehensive 15-Piece Metric Assortment
This collection delivers the perfect balance of range and precision. Spanning from 1.5mm to 10mm, it features fine 0.5mm increments up to 6.5mm, ideal for delicate pilot holes and exact fittings where precision is critical.
For heavier applications, it transitions to standard 1mm steps from 7mm to 10mm. Whether for detailed assembly or general construction, this curated assortment ensures you always have the exact diameter required, eliminating the frustration of missing the right size.
Standard HSS bits burn up on hard metals. Hymnorq M35 Cobalt is enhanced with 5% Cobalt for superior heat resistance. It easily penetrates stainless steel and cast iron where ordinary bits fail, staying sharp longer and saving you money on replacements.
Stays Sharp After Hundreds of Holes
Ultimate Durability Test: Continuous Drilling on Hard Metals
Watch as our M35 Cobalt bit tackles plate after plate of stainless steel and cast iron. Unlike standard bits that overheat and dull after just a few holes, the 5% Cobalt alloy maintains its hardness even at extreme drilling temperatures.
This video proves that whether it's the first hole or the hundredth, you get consistent precision, smooth chip removal, and industrial-grade performance. Stop wasting money on cheap bits; choose Hymnorq for heavy-duty endurance.
Can these drill bits cut through hardened steel or stainless steel?
Yes. M35 grade steel with 5% Cobalt is specifically engineered for high-tensile metals like stainless steel, cast iron, and titanium alloys. For fully hardened steel (HRC > 50), carbide bits are recommended.
Will these bits fit my standard cordless drill?
Yes. These feature standard round straight shanks. The largest diameter is 10mm, allowing them to fit securely into any standard 3/8-inch (10mm) or 1/2-inch (13mm) drill chuck.
Do I need to use cutting oil or lubricant?
Highly recommended. While Cobalt is heat-resistant, using cutting fluid significantly reduces friction and heat buildup. This prevents the bit from annealing (softening) and greatly extends its lifespan.
Do these bits require a center punch to start?
No. These bits feature a 135° Split Point tip. This design is self-centering and cuts immediately upon contact with the metal, preventing the bit from "walking" or skating across the surface.
Are these bits just coated with Cobalt or solid?
They are solid M35 Cobalt steel throughout, not just coated. Unlike titanium-coated bits that lose effectiveness once sharpened, these maintain their heat resistance and performance even after resharpening.
Product details
| Main Specification | |
|---|---|
| Saran Permukaan | Wood or Plastik or Iron or Baja Stainless or tembaga or Brass or Cast Iron or Aloy aluminium or Angle Steel |
| Manufaktur | Hymnorq |
| Cacah Unit | Cacah 1 |
| Cutting Diameter | 1.5 millimeters |
| Gaya Point | Split Point |
| Shank Type | Straight |
| Tool Flute Type | Spiral |
| Brand | HYMNORQ |
| UPC | 666389162076 |
| Cutting Angle String | 135 Degrees |
| Komponen Sertakan | 15 pieces of metric cobalt drill bits |
| Jumlah Potongan | 15 |
| Materi | Cobalt Steel |
| Tipe Selesai | Bronze |
| Product information | |
| Jumlah Paket | 1 |
| Atur Nama | 15PC Set |
| Technical Details | |
| Jenis Material | Cobalt Steel |
| Number of Flutes | 2 |
| Style | |
| Selesai Tipe | Bronze |
| Measurements | |
| Dimensi Butir | 5.91 x 4.33 x 1.57 inches |
| Others | |
| Sorot Butir | 135° Self-Centering Split Point Prevents Walking or Fully Ground Dual Flutes Reduce Friction or Rugged ABS Indexed Storage Case |
| Tipe Produk | Drill Bit Sets |
| Minimum Bore Diameter | 1.5 millimeters |