Clarke Super 7R - Sanding Cuts and Sandpaper Usage; Initial Cut Purpose; Final Cut Purpose; Sanding Grit Recommendations

Page 6 Clarke
®
American Sanders Super 7R Operator's Manual
12 grit For removing gross imperfections and
16 grit restore evenness to old flooring. To remove
20 grit build-up of paints and varnishes.
24 grit
30 grit For first sanding of new flooring (maple, oak).
36 grit For removing minor imperfections and finishes
from old flooring.
40 grit For initial cut on 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 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 and
conifers 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 for surface
roughening between coats of finish.
SANDING CUTS AND SANDPAPER
Initial Cut
The purpose of the initial cut is to remove old finish and gross imperfections on the floor surface. A coarse
abrasive should be used.
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.
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.
Grain Use
Standard Grade
Part #/Qty
Professional Grade
Part #/Qty
7" Diameter 7" Diameter
945594/200
945595/200
945596/200
945597/300
945598/300
945599/300
945600/300
945601/300
945602/300
945603/300
945604/300
945605/500
945606/300
945300/50
945301/50
945302/50
945305/100
945307/100
945308/100
945309/100
945310/100