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3/8" pitch (Oregon Type 90) with 39 drive links
Ideally suited for arborists and tree surgeons
Optimized for saws unders 55cc displacement
Reduced rail wear rate and more precise cutting via better chain fit up
3/8" pitch (Oregon Type 91) with 45 drive links
Oregon 100791X PowerMate Chainsaw Drive Sprocket - SPECIAL ORDER 3/8" pitch (Oregon Type 90)Oregon 100791X PowerMate Chainsaw Drive Sprocket System A complete sprocket system including a clutch cup with spline and a replaceable rim sprocket. The rim floats freely on the spline, maximizing chain bar alignment and the rim is replaceable which extends the life and increases the value of the sprocket system. The system provides smoother cutting and less chain jumping and wear. A needle bearing is not supplied with this particular sprocket.
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