Drive Sprocket Types; Harvesterlok® Information - Oregon Harvester Handbook

Drive Sprocket Types

Drive sprockets transfer power from your machine to your saw
chain to drive it around your guide bar . Drive sprockets are the
third member of your saw chain-based cutting system . They
will wear as a team and should be inspected and maintained as
a team .
Type
Rim
*Check the alignment of your rim drive sprocket regularly and
use shims to adjust the rim's position into correct alignment . See
pages 95 for more information on drive sprocket alignment .
HarvesterLok®
Rim
93
Advantages
• Best saw chain support
for cutters and tie-
straps .
• Uniform pressure
eliminates distortion,
warping .
• Fittings for smaller
shafts .
• Keyless hub .
• Hex-head set screws
for quick installation,
adjustment, and
removal in the field .
• No space between the
drive sprocket and shaft
gives zero backlash .
Mechanical Timber Harvesting Handbook
Disadvantages
• Setup is
important:
the rim must
be properly
aligned with
guide bar*
• Drive sprocket
must be
aligned to the
drive shaft
to prevent
damage to
the saw chain,
guide bar and
drive sprocket .