... Japan standard 2. A B C Single Double type 3. 45 steel \ A3 Q235 A-typeA-type sprockets (plate ... installations of conveyor rolls or chains require a sprocket for use with two single strand ... , 50SD, 60SD, 80SD, 100SD.Stainless Steel B-typeThese sprockets are made of SUS304 are available ... 2082B, SUS2040B, SUS2042B, SUS2050B, SUS2052B, SUS2060B, SUS2062B. A B C singgle double Sprocket welding in Japan