Drill Bit 7.8mm Diameter M42 8% Cobalt HSS TiN for Hard Metal
- 1- PACKAGE CONTENTS - 1 pack of 7.8mm drill bits, with a 116mm (4.57") overall length and 65mm (2.56") flute length, featuring a 135° split-point angle for reduced walking and enhanced drilling accuracy in metal, wood, and plastic applications.
- 2- MATERIAL - M42 cobalt high-speed steel drill bits, with a cobalt content 8%, deliver superior hardness and durability. Known for outstanding wear and heat resistance, as well as high crack resistance, these bits excel in drilling high-strength and difficult-to-machine metals. The titanium nitride (tin) coating enhances surface characteristics, boosting wear and corrosion resistance. This treatment contributes to prolonged tool lifespan and improved operational efficiency.
- 3- APPLICATION - For precision drilling in hard metals, hardwoods, composite boards, and carved components, these bits efficiently process dense woods like rosewood and teak. The cutting edges maintain exceptional sharpness even at high RPM, making them perfect for detailed craft carving, mortise-and-tenon joinery, and thin wood sheet drilling - the ultimate tool for woodworking DIY, furniture manufacturing, and artistic carving applications.
- 4- HIGH EFFICIENCY - Cobalt high-speed steel extended service life & reduced wear. Compared to standard HSS drill bits, it offers a 3–5 times longer tool life, significantly lowering the cost per hole. High-efficiency production: Its balanced wear resistance and toughness ensure reliable performance in automated equipment and high-volume machining.
- 5- TAKE NOTICE OF - Position the twist drill perpendicular (90°) to the workpiece surface. Begin drilling at low RPM (500-800) to establish a small hole, then adjust speed based on material: higher for wood, lower for metals. Use cutting fluid to effectively reduce temperature, minimize wear, and extend drill bit life
Estimated shipping
Select a product to estimate shipping.These Kozelo jobber drill bits are designed for precision drilling in a variety of materials, offering durability and accuracy for professional and hobbyist use. They’re built to handle tough jobs and deliver consistent results.
Key Highlights
- Enhanced Accuracy: The 135° split-point angle reduces walking and improves drilling precision, especially in metal.
- Superior Durability: Crafted from M42 cobalt high-speed steel with 8% cobalt content, these bits resist wear and heat for longer tool life.
- Improved Performance: The titanium nitride (TiN) coating increases wear and corrosion resistance, boosting operational efficiency.
- Versatile Use: Suitable for drilling hard metals, hardwoods, and composite materials, making them ideal for a range of projects.
Useful Facts
- Cutting Diameter: 7.8 millimeters
- Material: Cobalt Steel (8% Cobalt)
- Finish: Titanium Nitride Coating
- Shank Type: Straight
- Overall Length: 116mm (4.57")
- Flute Length: 65mm (2.56")
Good Fit For
- Metalworking and machining
- Woodworking projects, including hardwoods and composite boards
- Handicrafting and DIY projects
- Precision drilling tasks
Product details
Specifications
| Main Specification | |
|---|---|
| Manufacturer | Kozelo |
| Unit Count | 1 Count |
| Surface Recommendation | Metal |
| Cutting Diameter | 7.8 millimeters |
| Shank Type | Straight |
| Tool Flute Type | Spiral |
| Brand | Kozelo |
| Cutting Angle String | 135 Degrees |
| Included Components | not_applicable |
| Number of Pieces | 1 |
| Material | Cobalt Steel |
| Finish Type | Titanium Nitride |
| Technical Details | |
|---|---|
| Part Number | klf250407zz001278jp |
| Material Type | Cobalt Steel |
| Style | |
|---|---|
| Finish Types | Titanium Nitride |
| Others | |
|---|---|
| Item Highlight | Cutting Tool for Machining Hard Metal Stainless Steel Woodworking Handicraft Use, 135° Cutting Angle TiN |
| Product Type | Jobber Drill Bits |
| Tags | |
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