This fits Echo CS-302,CS-315,CS-330EVL,CS-351 John Deere 28,30,35,35EV,40V
3/8 pitch 6 (91) tooth crank shaft diameter is 0.315
Part# for additional bearing is 22152
One-piece spur sprockets are durable, economical and simple to use. Unlike rim sprocket systems, the chain-driving teeth and the clutch cup are combined into a single unit on spur sprockets. OREGON spur sprockets are available for all types of chain saws.