7mm M35 Cobalt Steel Twist Drill Bit Set for Hard Metal, 5 Pack
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- PREMIUM FIVE PERCENT BLEND: Constructed from industrial grade material enriched with cobalt to deliver extreme hardness, exceptional heat endurance, and prolonged lifespan on tough materials.
- EFFICIENT TWIN FLUTE GEOMETRY: Engineered with a specialized spiral structure that rapidly removes debris, significantly minimizing friction and preventing thermal buildup during high speed rotation.
- ACCURATE SELF CENTERING TIP: Features a precision head that instantly penetrates without wandering, ensuring exact holes and demanding less physical force from the operator.
- CORROSION RESISTANT COATING: Treated with a protective bronze finish to withstand harsh environments, while the fully ground cutting edges maintain uncompromised sharpness through repeated heavy use.
- SECURE STORAGE CASE: Arrives in a transparent PP plastic container that perfectly houses all pieces, protecting against damage and offering quick identification in your toolbox.
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Built for extreme heat and durability. This 5-piece 7mm M35 cobalt steel pack is your ultimate solution for heavy-duty drilling. Engineered to cut through stainless steel, cast iron, and hard alloys effortlessly without dulling. Stock up on your most essential size.
The precision 135-degree split point provides immediate self-centering. It prevents walking or skating on hard metals like stainless steel. This design requires less thrust and cuts faster, delivering clean and highly accurate holes every time.
Built with a standard straight round shank, these cobalt bits offer universal compatibility. They fit securely into all standard drill chucks. Whether using a portable power drill or a drill press, expect a firm, slip-free grip for safe drilling.
Forged with 5% cobalt for extreme heat resistance and superior hardness. Easily powers through stainless steel and tough alloys
The fully polished double-flute spiral design clears debris quickly, reducing friction and heat buildup for faster, smoother drilling.
Fully ground from solid metal for razor-sharp edges and high dimensional accuracy, ensuring perfectly round, clean, and burr-free holes.
Features a specialized bronze oxide finish that prevents corrosion and retains lubricants, significantly extending the lifespan of each bit.
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, absolutely! These drill bits feature a universal straight round shank. They are fully compatible and will lock securely into the standard chucks of almost all portable cordless drills, corded power hand drills, and drill presses.
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 center punch needed. They feature a 135° split point that provides immediate self-centering. This prevents walking or slipping on hard metals like stainless steel, allowing you to start your hole precisely and directly every time.
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 | Besi or Baja Stainless or Tembaga or Kuningan or Cast Iron or Aloy aluminium or Angle Steel |
| Manufaktur | Hymnorq |
| Cacah Unit | Cacah 5 |
| Dialog Pemotongan | 7 Millimeters |
| Gaya Point | split |
| Tipe Shank | Lurus |
| Jenis Flute Alat | Spiral |
| Brand | HYMNORQ |
| UPC | 666389195654 |
| Potong String Sudut | 135 derajat |
| Komponen Sertakan | 5 pieces of 7mm cobalt drill bits |
| Jumlah Potongan | 10 |
| Materi | Cobalt |
| Tipe Selesai | perunggu |
| Product information | |
| Atur Nama | 5-Piece |
| Technical Details | |
| Jenis Material | Cobalt |
| Jumlah Flutes | 1 |
| Style | |
| Selesai Tipe | Perunggu |
| Others | |
| Sorot Butir | Garis lurus or 135-Degree Split Point Prevents Walking or Dual Flutes Enhance Chip Clearance or Ideal for Stainless Cast Iron |
| Tipe Produk | Jobber Drill Bits |
| Dialog Bore Minimum | 7 millimeters |