74-Piece M35 Cobalt Drill Bit Set, 1-8mm Metric Bits for Hard Metal
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- Industrial-Grade M35 Cobalt Steel: Engineered with high-speed steel containing 5% cobalt (HSS-CO), these bits offer superior heat and abrasion resistance. Specifically designed to cut through tough, high-tensile materials like stainless steel, cast iron, and titanium alloy with ease.
- Precision 135° Split Point: The fully ground 135-degree split point tip centers immediately upon contact, preventing "walking" or skating across the work surface. This design requires less pressure to penetrate and ensures clean, accurate holes every time.
- 74-Piece Metric Workshop Stock: A comprehensive assortment ranging from 1mm to 8mm, providing an abundant supply of the most commonly used sizes. Perfect for professional workshops, machinists, and contractors who need reliable replacements on hand for continuous drilling tasks.
- Fully Ground for Efficiency: Manufactured to strict DIN338 standards with a fully ground body and dual twist flutes. This geometry maximizes chip removal and coolant flow, reducing heat buildup and extending the lifespan of the bit during heavy-duty use.
- High-Value Bulk Packaging: Note: These bits are packed in a sealed plastic bag (no index case included). This bulk packaging offers maximum value, allowing you to pay for premium tool quality rather than expensive storage, ideal for replenishing your tool chest or inventory.
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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.
Optimized Assortment: Extra Stock of High-Usage Sizes
Stop pausing work to buy replacements. This 74-piece set prioritizes the exact metric sizes professionals use most, providing heavy redundancy to combat broken bits.
10x: 1.0mm, 1.5mm, 2.0mm, 2.5mm
5x: 3.0mm, 3.2mm, 3.5mm, 4.0mm, 5.0mm, 6.0mm
2x: 7.0mm, 8.0mm
Whether drilling pilot holes or securing fasteners, this intelligent distribution ensures you always have a sharp backup ready in your toolbox.
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 8mm, 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 | |
|---|---|
| Felszíni ajánlás | fa or Műanyag or Vas or Rozsdamentes acél or Réz or Réz or Öntött vas or Alumíniumötvözet or Angle Steel |
| Gyártó | Hymnorq |
| Egységszám | 74 Count |
| Átmérő vágása | 8 milliméter |
| Point Style | Split Point |
| A lábszár típusa | Egyenesen |
| Eszköztípus | Spirál |
| Márka | HYMNORQ |
| Szögének vágása | 135 fok |
| Összetevők | 74pcs metric 11 sizes bits |
| Darabok száma | 74 |
| Anyag | Kobalt acél |
| Befejezési típus | Bronz |
| Elem súlya | 0, 1 kg |
| Product information | |
| Csomagok száma | 1 |
| Név beállítása | 74-Piece Cobalt Drill Bit Set |
| Technical Details | |
| Részszám | SB-74 |
| Minta | SB-74 |
| Anyagtípus | Kobalt acél |
| Furulyák száma | 2 |
| Style | |
| Befejezési típusok | Bronz |
| Others | |
| Elem kiemelése | Öntött vas or cuts stainless steel or 135° Split Point Prevents Walking or DIN338 Fully Ground for High Heat Resistance or Bulk Pack |
| Terméktípus | Jobber Drill Bits |