Struers Accutom-50 Manuel D'instructions page 58

Common Cutting Questions
Cup Wheels
54
Accutom-50
Instruction Manual
The following table shows the possible answers to a number of
common cutting questions:
Optimising the Cutting Results
Objective How to achieve it
Better surface Use lowest recommended feed speed and no specimen
quality holder rotation.
Lower wheel wear Use the lowest recommended feed speed and no specimen
holder rotation. This is especially important when using resin
bonded wheels and all abrasive cut-off wheels.
Problems with Abrasive cut-off wheels should not be used outside their
abrasive cut-off recommended feed speed range. At lower than
wheels? recommended feed speeds they will produce irregularly cut
surfaces. At higher feed speeds excessive wheel wear will
occur, along with increased risk of wheel breakage.
Flatter samples Use primarily low feed speeds, highest recommended wheel
speed, largest possible flanges and no specimen holder
rotation.
The initial kerf is especially critical. If the initial feed speed is
too high the wheel will bend and start cutting at an angle.
Such a cut will never end up flat.
Better parallelism Use the lowest recommended feed speed.
Faster cutting Orientate the sample so that the wheel will cut the smallest
possible cross-section and then use maximum
recommended feed speed.
Material Hardness
Ceramics, > HV 800
minerals and
crystals
Sintered car- > HV 600
bides, hard
ceramics and
hard compo-
sites
Size Bond Abrasive
ø100 Soft metal Diamond
ø100 Resin Diamond
Grit Cat. No:
#150 M0P10
40800082
#300 B0P10
40800083