Standard hub sprockets

Standard hub sprockets (or boss sprockets) are supplied as per ISO 606B, BS 228 and DIN 8187 to suit the European standard roller chain from 03B to 72B in single, double and triple strand. Such sprockets are supplied as stock bore (for Taper lock) or pilot bore or reboreable bore. Additional treatment available is surface oxidization (blackened), zinc-plating, nickel-plating or dacrotising as well as teeth hardening.