Stihl TS 700 Instruction Manual page 15

6 Diamond Abrasive Wheels
– the numbers denote the performance class of
the STIHL diamond abrasive wheel
6.2 Axial and radial run-out
A faultless spindle bearing of the cut-off machine
is necessary for a long service life and efficient
functioning of the diamond abrasive wheel.
Using the abrasive wheel on a cut-off machine
with a faulty spindle bearing can lead to devia‐
tions in radial and axial run-out.
An excessively high radial run-out deviation (A)
overloads individual diamond segments, which
overheat in the process. This can lead to stress
cracks in the parent wheel or to annealing of indi‐
vidual segments.
Deviations in axial run-out (B) result in higher
thermal loading and wider cuts.
6.3 Undercut
Do not cut into the base course (frequently chip‐
ped stones and gravel) when cutting roadway
pavement – cutting in chipped stones and gravel
is revealed by light-colored dust – excessive
undercut may occur as a result – Danger of shat‐
tering!
0458-572-0121-E
6.4 Built-up edges, sharpen
Built-up edges take the form of a light gray
deposit on the tops of the diamond segments.
This deposit on the segments clogs the dia‐
monds and blunts the segments.
Built-up edges can form:
– when cutting extremely hard materials, e. g.,
granite
– with incorrect handling, e. g., excessive feed
effort
Built-up edges increase vibration, reduce cutting
performance, and cause formation of sparks.
At the first signs of built-up edges, immediately
"sharpen" the diamond abrasive wheel – to do
this, briefly cut through abrasive material such as
sandstone, aerated concrete or asphalt.
Addition of water prevents the formation of built-
up edges.
If work continues with dull segments, these may
soften due to the high heat generated – the
parent wheel is annealed and its strength is com‐
promised – this can lead to stresses that are
clearly recognizable by gyrations of the abrasive
wheel. Do not continue to use the abrasive wheel
– Risk of accident!
English
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