In the field of mechanical processing, hard alloy drill bits, with their high hardness, wear resistance and corrosion resistance, have become important tools for efficient processing, accounting for approximately 20% of the total processing volume. How to choose the appropriate hard alloy drill bit in the face of different processing requirements? What types are there? This article will provide you with a detailed analysis.

How to choose the right carbide drill bit?

The selection of drill bits should be based on the processing equipment, workpiece material and processing requirements. The following are recommended solutions for common application scenarios:

High-precision machining center

Recommended drill bit: Solid carbide drill bit

Features: Made of fine-grained hard alloy material and treated with a coating on the surface, it has a longer service life. The optimized geometric edge shape ensures self-centering ability and excellent chip control, making it suitable for high-precision hole processing.

Lathes and ordinary rotary processing equipment

Recommended drill bit: Hard alloy indexable insert drill bit

Features: Suitable for processing with a wide range of hole diameters, economical and efficient, and suitable for mass production.

High-rigidity and high-speed machine tools (such as CNC lathes and machining centers) :

Recommended drill bits: Welded carbide drill bits or replaceable crown drill bits

Features: Welded type: Steel drill body + hard alloy tooth crown, good rigidity, suitable for stable cutting.

Replaceable tooth crown type: The knife body can be reused, and only the worn tooth crowns need to be replaced, reducing long-term costs.

Advantages: Self-centering design, low cutting force, high hole wall surface finish, precise dimensions, and reduced subsequent finishing requirements.

The four major types of carbide drill bits:

Although there are many types of carbide drill bits, the core types can be summarized into the following four categories:

Solid carbide drill bit - high rigidity, suitable for precision machining.

Hard alloy indexable insert drill bit - economical and practical, suitable for medium to large hole diameter processing.

Welded carbide drill bits - combining the toughness of steel bodies with the wear resistance of carbide.

Replaceable hard alloy tooth crown drill bit - Modular design, reducing tool maintenance costs.