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Best Drill Bits for Hardened Steel: A Comprehensive Guide
Drilling into hardened steel can be a challenging task, but with the right drill bits, it can be made much easier. Whether you’re a professional tradesman or a DIY enthusiast, selecting the best drill bits for hardened steel is crucial for achieving clean, precise holes. In this article, we will explore various types of drill bits, their features, and how to choose the best one for your needs.
Types of Drill Bits for Hardened Steel
When it comes to drilling into hardened steel, there are several types of drill bits to consider:
| Drill Bit Type | Description |
|---|---|
| High-Speed Steel (HSS) Drill Bits | These bits are made of high-speed steel and are suitable for drilling into mild steel and other soft metals. They are not ideal for drilling into hardened steel due to their lower hardness. |
| Carbide-Tipped Drill Bits | Carbide-tipped drill bits are designed for drilling into hardened steel and other tough materials. They have a longer lifespan and can withstand higher temperatures than HSS bits. |
| Black Oxide Drill Bits | Black oxide-coated drill bits are designed to reduce friction and heat during drilling. They are suitable for drilling into hardened steel and other materials that generate a lot of heat. |
| Carbide Bur Drill Bits | Carbide bur drill bits are used for drilling small holes in hardened steel. They have a sharp, pointed tip that allows for precise drilling. |
Features to Consider When Choosing Drill Bits for Hardened Steel
When selecting drill bits for hardened steel, there are several features to consider:
- Material: As mentioned earlier, carbide-tipped and black oxide-coated drill bits are ideal for drilling into hardened steel.
- Coating: A coating on the drill bit can reduce friction and heat, making it easier to drill into hardened steel. Look for bits with black oxide or titanium nitride coatings.
- Flute Design: The flute design of the drill bit affects chip removal and cooling. A good flute design ensures efficient chip removal and keeps the bit cool during drilling.
- Tip Geometry: The tip geometry of the drill bit determines how well it can cut through the material. A sharp, pointed tip is ideal for drilling into hardened steel.
- Shank Size: Ensure that the shank size of the drill bit matches your drill’s chuck size.
Top Drill Bits for Hardened Steel
Based on customer reviews and expert opinions, here are some of the best drill bits for hardened steel:
- Makita 18V LXT Lithium-Ion Brushless Cordless 1/2″ Drill Driver – This drill driver features a 4-pole motor and a brushless design for increased power and efficiency. It comes with a variety of drill bits, including carbide-tipped bits suitable for drilling into hardened steel.
- DeWalt DW390K 1/2″ x 20 TPI High-Speed Steel Drill Bit Set – This set includes 13 high-speed steel drill bits with a variety of sizes and tip geometries. The bits are suitable for drilling into mild steel, stainless steel, and other materials.
- Black & Decker BDH2000C 20V MAX Lithium Ion Drill/Driver – This drill/driver features a 20V MAX lithium-ion battery for increased runtime and power. It comes with a variety of drill bits, including carbide-tipped bits suitable for drilling into hardened steel.
- Milwaukee 49-22-0900 1/2″ x 20 TPI Cobalt Drill Bit Set – This set includes 10 cobalt drill bits with a variety of sizes and tip geometries. Cobalt bits are known for their durability and ability to drill into tough materials like hardened steel.
