Assembly job is always a difficult work in all manufacturing sections. Because, it takes lots of manpower, and automation is difficult. Automatic Assembly Machine is never a standard machine, to design and manufacture this kind of machine will take lots of experience and long process. For years, people spent lots of effort to improve manufacturing process, however, less effort in improving assembly works. Chin Minn has spent 20 yearsíª effort in developing automatic assembly machine for steel ball slide assembly. That machine has helped many companies in saving labors, increasing productivities, and reducing costs. Process: 1. Assemble: a. ball cage+b. steel ball+c. middle rail 2. Assemble: a. assembled components from step 1.+b.plastic plug 3. Assemble: a. assembled components from step 2.+b. plastic strips 4. Bend end piece: a. Bend end piece on outer rail 5. Insert plastic plug on end piece .