​​Shrinkless Collet Overview:​​

Crafted from premium spring steel and subjected to specialized heat treatment, this collet delivers exceptional strength and wear resistance. Designed for use with non-shrinkage tube expanders, it securely clamps copper, aluminum, or stainless steel tubes to prevent shrinkage during expansion.

Customizable to fit fully automatic vertical and horizontal shrinkless tube expanders from various manufacturers, it accommodates diverse tube diameter specifications. Ideal for expanding heat exchangers in refrigeration applications—including air-conditioning systems, water heater tanks, automotive air conditioners, heat pumps, and rail transit HVAC units—this collet offers tailored solutions for precision performance. Specifications are available upon request.

✔ ​​High Wear Resistance​​ – Optimized for industrial applications

​​Applications:​​ HVAC, refrigeration, automotive heat exchangers & industrial tube processing.

 Company Introduction:

         Guangzhou Runshi Mould Co., Ltd. was established in September 2010 and is located in the core city of Guangzhou in the Guangdong Hong Kong Macao Greater Bay Area. It is adjacent to Shenzhen and Dongguan to the east, Zhongshan in Foshan to the west, Guangzhou Airport to the north, Shenzhen Airport to the east, and Guangzhou South Station, with numerous highways and convenient transportation. It is a company that integrates research and development, production, sales, and service, committed to the precision machinery manufacturing industry, based in the Greater Bay Area, and serving the world. To provide technologically advanced and high-quality mold accessory manufacturing services for our customers.

          The company supplies molds, vulnerable parts, and cutting tools for the air conditioning, refrigeration, and heat exchanger industry, such as Hairpin Bender Accessories,Return Bender Accessories,Tube Expander Accessories,Fin Die Accessories,CNC 3D Tube Bender Accessories，CNC Tube Chipless Cutting Machine Accessories,CNC Hole Punching Machine Accessories,Tube End Forming Machine Accessories,Ring Inserted Machine Accessories,Pipe End Tools,Metal Cutting Saw Blade,as well as superhard material products, such as tungsten steel parts, ceramic parts, etc. The materials used by the company include Tungsten steel , Zirconia ceramics,alumina ceramic,Silicon nitride ceramics,Silicon carbide ceramics, titanium cobalt alloy, powder high-speed steel, high-speed steel, alloy steel, etc., and also support non-standard customization based on drawings and samples.

          The company always adheres to R&D and manufacturing as the core, market-oriented, striving for excellence, precision manufacturing, optimization and integration of enterprise resources, and excels in the design and manufacturing of non-standard products, providing customized solutions to meet the personalized production needs of customers, thereby reducing costs and improving efficiency for customers.

          Our company is people-oriented, sincere and united, and intelligently creates world-class products. We deeply understand that only with the success of our customers can we succeed, and only with the success of our employees can we achieve the success of the enterprise. While realizing the value of our employees and promoting the development of the enterprise, we must actively repay society, serve society, and realize the value of the enterprise. The corporate spirit of Runshi Mould Company is to strive for self-improvement and uphold virtue. With this belief and a highly responsible attitude towards the country, society, customers, and employees, we aim to build Runshi Mold Company into a high-quality enterprise with intelligent manufacturing and global service.