Constructed from high-grade spring steel and processed with specialized heat treatment, this durable no shrinkage collet ensures tubes remain expanded without shrinking. It works with copper, aluminum, and stainless steel tubes, making it perfect for refrigeration and HVAC systems.

Custom designs for vertical and horizontal tube expanders can be made according to specific tube diameter requirements.

Guangzhou Runshi Mold Co., Ltd. specializes in precision machinery manufacturing, providing equipment molds, vulnerable parts, and cutting tools for air conditioning and heat exchanger manufacturing. We also serve industries including new energy, medical devices, semiconductors, aerospace, and automotive.