Nilfisk-ALTO American 12 - Manual (Page 13)

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