... Sprocket welding bub Japan 1. Japan standard 2. A B C Single Double type 3. 45 steel \ ... without hardend teeth as standard.We can provide a range from ANSI25 up to ANSI160 as stock. ... teeth sprocket, please see hardened teeth sprocket table. 25A, 35A, 40A, 50A, 60A, 80A, 100A, 120A, 140A, ... -DoubleMany installations of conveyor rolls or chains require a sprocket for use with two single strand chains ...