How to Reduce Tool Wear in Automotive Parts Machining: Material and Geometry Selection

In the German automotive manufacturing industry, metric thread machining is widely used in engine components, transmission systems, and structural parts. Due to high production volumes and continuous operation, tool wear becomes a key factor affecting process stability and efficiency.

In practice, rapid tool wear is often caused by material properties, cutting load, and chip evacuation conditions. Automotive components are typically made of alloy steel or stainless steel, which generate high cutting resistance. Chips produced during machining tend to adhere to the cutting edge, increasing friction.

From a machining perspective, increased temperature and friction accelerate tool wear. If chips are not effectively removed, they form an interference layer in the cutting zone, further reducing tool life.

DIN371 spiral flute taps provide an optimized solution. With a spiral angle of approximately 35° (Spiral R35), chips are directed upward, reducing accumulation. The short thread design (6–15 mm) minimizes cutting engagement length, reducing friction. The plug chamfer ensures gradual cutting engagement and balanced load distribution.

Key parameters include a size range from M3 to M10, overall lengths of 56–100 mm, and high-speed steel materials such as M42 and M35, which provide wear resistance and thermal stability. The 6H tolerance ensures consistent thread quality.