... requirements 3. CNC and automatic lathes There are many types chain roller,1. S small type2. P large type3. R large ... type4. F flanged type The roller's metrial can be as per customer's request,1 ... etc.4. nylon or plastic, such as PA6, etc. The roller also has many types heat treatment,1. quenched2. surface heat3 ... capacity to ensure quality and delivery. P type large chain roller