Sanding cuts and sandpaper, Initial cut, Final cuts – American Sanders American 12 Drum Sanders User Manual

Page 13

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Clarke

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American Sanders - American 12 Floor Sander Operator's Manual

Page 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 sand-

ing equipment should be adjusted to heavy sanding pressure setting and a coarse abrasive should be used.

If the surface is severely damaged by deep scratches, pre-existing 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.

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