... 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 ... steel, such as ss304, etc.4. nylon or plastic, such as PA6, etc. The roller also has many types heat treatment,1 ... capacity to ensure quality and delivery. P type large chain roller