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This two–piece sprocket system is the ultimate way to drive the
chain on most types of saw and can be used by all types of chainsaw
user.
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The complete sprocket system includes a clutch cup with spline and
a replaceable rim sprocket.
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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.
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The system provides smoother cutting and less chain jumping and
wear.
NOTE: All rim sprockets have two sets of teeth. A free-floating rim
installs on the clutch cup by sliding on to the cup’s toothed splines. OREGON®
splines have either a “small” or “standard” diameter and have either six or
seven teeth. Be aware that the teeth on the spline (which hold the rim in place)
are different from the teeth around the outer edge of the rim (which drive the
chain). Some OREGON® rims have seven teeth on the spline and have the same count
of seven teeth around their outer edge.
Be careful not to confuse the spline’s teeth in the centre of the rim
with the chain driving teeth around the rim’s outer
edge.
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