The KWB 209640 HSS twist drill bit is a precision-engineered tool designed for reliable performance in various drilling applications. With a diameter of 4 mm and a total length of 75 mm, this drill bit is manufactured according to DIN 338 standards, ensuring compatibility with standard drill chucks via its cylindrical shank. The tool features a robust roll-forged construction and a steam-hardened surface, which enhances its durability and resistance to wear during intensive use.
Advantages
This drill bit offers exceptional stability and efficiency due to its type N geometry and 118-degree tip angle, which facilitates effective centering and rapid material penetration. The steam-hardened, blue-black finish provides improved heat resistance and chip removal, extending the service life of the tool even when working with tougher materials. Its right-hand cutting design ensures smooth operation and consistent hole quality across a wide range of metal and plastic substrates.
Suitable for
- Drilling into alloyed and mild steel
- Working with cast iron materials
- Processing non-ferrous metals
- Drilling into hard plastics
When it may not be suitable
This drill bit is not intended for use on hardened steel, stainless steel alloys, or masonry and concrete surfaces, as these materials require specialized carbide-tipped or cobalt-alloyed bits. Using this HSS bit on such materials may lead to rapid dulling or breakage.
Key specifications
- Diameter: 4 mm
- Total length: 75 mm
- Material: High-speed steel (HSS)
- Standard: DIN 338
- Tip angle: 118 degrees
- Shank type: Cylindrical
- Cutting direction: Right-hand
How to use
Insert the drill bit into the chuck of your power drill or drill press, ensuring it is tightened securely. Align the tip of the bit with the marked center point of your workpiece. Apply steady, moderate pressure while maintaining a consistent rotation speed appropriate for the material being drilled. It is recommended to use a cutting oil when drilling into metals to reduce friction, prevent overheating, and improve the finish of the hole.
What to consider before purchase
- Verify that your drill chuck supports a 4 mm cylindrical shank.
- Ensure the material you intend to drill is compatible with standard HSS bits.
- Consider using a center punch to mark the drilling location for higher precision.
Usage recommendations
Always wear appropriate eye protection and secure the workpiece with clamps before starting the drilling process to ensure safety and accuracy.
