productsharvester sprockets  3/4" pitch drive sprockets   3/4" Pitch Harvester Drive Sprockets OREGON® rim-style drive sprockets are for use on mechanical timber harvesters and equipment utiltizing 3/4" pitch bar and chain cutting systems, fitting 11BC and 11H chain. OREGON® rim-style drive sprockets are for use on mechanical timber harvesters and equipment utiltizing 3/4" pitch bar and chain cutting systems, fitting 11BC and 11H chain.   OREGON® pin-style drive sprockets are for use on mechanical timber harvesters and equipment utiltizing 3/4" pitch bar and chain cutting systems, fitting 11BC and 11H chain.   OREGON® spur-style drive sprockets are for use on mechanical timber harvesters and equipment utiltizing 3/4" pitch bar and chain cutting systems, fitting 11BC and 11H chain.