Fin die stretching bushings are manufactured from high-performance powder high-speed steel, such as HAP40 and ASP30, or hard alloy YG8, ensuring a long service life and high manufacturing accuracy. These bushings are crucial for punching aluminum foil, copper foil, and stainless steel in fin dies, playing an important role in the production of fins for air conditioning, refrigeration, heat exchangers, surface coolers, evaporators, and condensers.

We offer a variety of spare parts, including punching bushings, flanging bushings, and stretching bushings, for high-speed fin production lines across multiple brands.

The HAP40 Fin Die Bushing is a high-performance precision component designed for fine blanking, piercing, and forming applications in demanding industrial environments. Manufactured from HAP40 powder metallurgy high-speed steel, it offers exceptional wear resistance, heat stability, and edge retention—ideal for high-volume production with tight tolerances.

Guangzhou Runshi Mold Co., Ltd. focuses on the precision machinery manufacturing industry. Since its establishment, the company has mainly provided equipment molds, vulnerable parts, and cutting tools for air conditioning and heat exchanger manufacturing enterprises.

We also provide ceramic parts and tungsten steel parts for industries such as:

• New energy
• Fluid control
• Medical devices
• Semiconductor
• Aerospace
• Photovoltaics
• Lithium batteries
• Petrochemicals
• High-precision automation equipment
• Electronic communication
• Automotive

If you have another question, please feel free to contact us.