American Sanders FloorCrafter Belt Sander - Manual (Page 13)

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Clarke ® American Sanders Operator's Manual (EN) - Floorcrafter - 13 -
Sanding Cuts and Sandpaper
Initial Cut
The purpose of the initial cut is to remove old finish and
gross imperfections on the floor surface. The sanding equip-
ment should be adjusted to heavy sanding pressure setting
and a coarse abrasive belt should be used. If the surface
is severely damaged by deep scratches, preexisting dwell
marks, uneven planks, etc., it may be necessary to sand
across or diagonally to the grain to restore evenness to the
surface. If these conditions are not present, the initial cut
should be done in the direction of the grain.
If glazing, loading, or burning takes place immediately into
an initial cut, select a coarser abrasive. If this should occur
during an initial cut, the abrasive has dulled and must be
replaced.
Final Cuts
The purpose of a finishing cut is to remove the scratches
produced during the initial cut. Use a fine (60 - 80 grit) grain
abrasive and a reduced sanding pressure setting.
If the surface remains rough after a finishing cut, it may be
necessary to use an even finer grain of abrasive (80 - 100
grit). Care should be taken in selecting the grit size of the
abrasive. A very fine grain will close the pores on a wood
floor making admission of a stain difficult.
If glazing or burning should occur immediately into a finishing
cut, reduce the sanding pressure. If it should occur during a
finishing cut, the abrasive has dulled and must be replaced.