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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
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.
Grain
Use
12 grit
16 grit
For removing gross imperfections and restore evenness
20 grit
to old flooring. To remove build-up of paints and varnishes.
24 grit
30 grit
For first sanding of new flooring (maple, oak). For removing
36 grit
minor imperfections and finishes from old flooring.
40 grit
For first sanding of new flooring (oak, walnut). For removing
minor imperfections and finishes from old flooring.
50 grit
For first sanding of new flooring (cedar, pine, fir)
For clean-up of 16 grit.
60 grit
For clean-up from initial cut 36 - 40 grit.
80 grit
For final sanding of certain hardwoods. For clean-up
of initial cuts (50 grit).
100 grit
For final sanding of certain hardwoods where a smooth
surface is desired.
120 grit
For final sanding of certain conifers.
150 grit
For final sanding of certain conifers where a smooth
surface is desired.
180 grit
For surface roughing between coats of finish.
AMERICAN SANDERS TECHNOLOGY -American 12 Floor Sander Operator's Manual
Abrasive Bulk Roll
Note: All part numbers listed are for 12" x 50' (30.5 cm x 18m)
Part No.
945516
945517
945518
945519
945520
945521
945522
945533
945544
945545
945546
945547
945548
945549
Page 13
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