M35 Cobalt Step Drill Bit, Metric 3-14mm, 1/4" Hex Shank, 12 Sizes
- TRUE M35 COBALT HSS – Manufactured from industrial-grade High-Speed Steel with 5% Cobalt (M35 Grade). Harder and more heat-resistant than standard HSS4241 or HSS6542 bits. It is specifically engineered to cut through hard metals like 304 stainless steel, cast iron, and high-carbon steel without dulling quickly.
- 12-IN-1 METRIC SIZES – Why carry a heavy box of bits? This single bit covers 12 metric sizes: 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, and 14mm. The step height is 5mm, perfect for drilling or enlarging holes in sheet metal up to 5mm thick. Laser-etched markings make size identification easy.
- DUAL SPIRAL FLUTE & HEX SHANK – The 2-flute spiral design clears chips faster and allows particles to escape easily, reducing heat buildup and friction. The 1/4-inch hex shank ensures a secure, non-slip fit in standard power drills, impact drivers, and bench drills, providing greater torque transmission than round shanks.
- UNBEATABLE ON STAINLESS STEEL – Unlike standard bits that fail on hard materials, this M35 bit excels on 304 Stainless Steel. Usage Guide: For stainless steel up to 1mm thick, a hand drill is sufficient; for 2-3mm thickness, a bench drill is required for stability and safety. Also cuts wood, plastic, and aluminum effortlessly. (NOTE: Not for glass, tile, or concrete walls).
- EXTEND BIT LIFE – Crucial Tip: Cobalt is hard but brittle. To prevent burning or snapping, continuous cooling (using cutting oil or water) is MANDATORY during operation. Keep the drill vertical and use low RPMs for harder metals to ensure the longevity of the cutting edge.
Estimated shipping
Select a product to estimate shipping.Stop struggling with stainless steel. Our M35 Cobalt bit is engineered for 304 stainless and hard alloys. With 5% Cobalt for heat resistance, a dual spiral flute for fast clearing, and a 118° split point, it delivers the 5X longevity and precision that professional workshops demand.
Standard bits melt under pressure. Our 5% Cobalt blend maintains structural integrity and sharpness even at red-hot temperatures.
Dual spiral flutes clear metal chips instantly to reduce friction and heat. Prevents jamming and ensures a clean, burr-free hole every time.
Fits standard drills and impact drivers. Provides anti-slip grip and maximum torque transfer for heavy-duty drilling.
The 118° split point prevents walking and skidding. It ensures a fast, precise start on metal surfaces without the need for a center punch.
Standard HSS bits burn out quickly on hard metals. Our M35 Cobalt alloy withstands temperatures up to 650°C, delivering 5X the lifespan. It effortlessly slices through 304 stainless steel, saving you the time and cost of replacing broken bits.
5mm Step Height & Laser Size
True 5mm Vertical Steps for Flawless Cylindrical Holes
Stop creating tapered, funnel-shaped holes when working with thicker metals.
Unlike cheap alternatives with shallow steps, the Hymnorq M35 bit features a true 5mm vertical step depth. This allows you to bore perfectly straight, cylindrical holes through materials up to 5mm thick.
Additionally, the permanent laser-etched markings from 3mm to 14mm will never rub off, ensuring you always drill to the exact diameter required with absolute precision.
12 Metric Sizes in One Single Bit
Replace an Entire Drill Bit Set & Streamline Workflow
Stop wasting time constantly swapping bits for different hole sizes. This single Hymnorq M35 step bit integrates 12 essential metric sizes (3mm to 14mm) into one compact powerhouse.
By replacing a cumbersome 12-piece twist drill set, it lightens your toolbox and streamlines your workflow.
You can seamlessly drill or enlarge holes to the exact diameter required without ever taking the bit out of your chuck. Maximum efficiency for professionals.
Cuts through hard stainless steel (up to 5mm thick) effortlessly. Ideal for electricians and panel builders.
Perfect for automotive repair and metalworking. Quickly enlarges holes in thick iron and carbon steel plates.
Dual spiral flutes prevent softer metals from melting or clogging the bit, ensuring a smooth and burr-free finish.
Delivers precise, clean edges on plastic enclosures and PVC pipes without cracking or shattering the material.
Why must I use cutting oil or water during drilling?
Friction causes extreme heat. Without cooling fluid, the bit anneals and dulls instantly. Continuous lubrication prevents burning and ensures a 5X lifespan.
Can I use a hand drill on 3mm thick stainless steel?
No. For stainless steel over 1mm thick, a bench drill is mandatory. Hand drill vibrations will easily snap the hard but brittle cobalt bit.
Why did my bit turn red or get dull on the first use?
Burning is usually caused by high RPMs or dry drilling. For hard metals, always use low speeds, firm pressure, and continuous cooling to protect the edge.
How does M35 Cobalt differ from standard HSS bits?
Standard HSS quickly loses temper on 304 stainless steel. Our 5% Cobalt alloy maintains "Red Hardness" at high temperatures, cutting effortlessly.
What is the step height and maximum drilling thickness?
Each step has a true 5mm depth. This allows you to bore perfect, non-tapered cylindrical holes in materials up to 5mm thick (bench drill required).
Product details
Especificaciones
| Main Specification | |
|---|---|
| Fabricantes | Hymnorq |
| Cuenta de unidad | 1 Cuenta |
| Recomendación sobre la superficie | Acero inoxidable |
| Diámetro de corte | 3 milímetros |
| Estilo de punto | Punto de división |
| Tipo de Shank | Hex |
| Tipo de fluido de la herramienta | Spiral |
| Marca | HYMNORQ |
| UPC | 755205247049 |
| Cortar la cuerda del ángulo | 118 grados |
| Número de piezas | 1 |
| Product information | |
|---|---|
| Número de paquetes | 1 |
| Technical Details | |
|---|---|
| Número de la parte | bit 3-14 |
| Modelo | bit 3-14 |
| Tipo de material | Cobalto de acero |
| Número de fluidos | 2 |
| Style | |
|---|---|
| Tipos de acabado | Bronce |
| Otros | |
|---|---|
| Tema | Marcas por láser, Dual Spiral Flutes Reduce Heat, Cuts 304 Stainless Steel, Cast Iron & Hard Metal Max 5mm Thick |
| Tipo de producto | Step Drill Bits |
| Etiquetas | |
|---|---|
| Etiquetas | |