51Chain and Bar Manual
Condition
Bottoms worn at an angle (from
front to rear) on all cutters and
opposing tie straps.
Cause
a) Insufficient chain tension.
Excessive pressure has been
applied to make dull cutters and/or
cutting edges with over-wide side
plate angle cut.
Remedy
Install new chain and tension it
correctly.
Condition
Excessive wear on bottoms of all
cutters and tie straps although
cutting edges are only slightly worn.
Cause
a) Chain running dry (lack of
lubricating oil).
b) Excessive pressure applied to
make dull chain with high depth
gauges cut.
Remedy
a) Check chain lubrication and
repair if necessary.
b) Sharpen chain correctly, rework
depth gauges.
Condition
Concave wear on bottom of all
cutters and tie straps.
Cause
Chain over-tensioned and is also
running dry (lack of lubricating oil).
If cutting is continued under these
conditions the chain will overheat
and result in cracked tie straps.
Remedy
Tension chain properly, check chain
lubrication and repair if necessary.
Note
This condition occurs mostly with
Duromatic type bars.
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