Clarke OBS-18 - Sanding Cuts and Sandpaper

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American Sanders Operator's Manual (EN) - OBS-18/18DC HDTR FORM NO. 70403B - 9 -
Sanding Cuts and Sandpaper
Initial Cut
The purpose of the initial cut is to remove old fi nish and gross imperfections on the fl oor surface. Use a course (20-36 grit) grain
abrasive.
Final Cuts
The purpose of a fi nishing cut is to remove the scratches produced during the initial cut. Use a fi ne (60-80 grit) grain abrasive.
If the surface remains rough after a fi nishing cut, it may be necessary to use an even fi ner grain of abrasive (80-100grit). Care should
be taken in selecting the grit size of the abrasive. A very fi ne grain will close the pores on a wood fl oor making admission of a stain
diffi cult.
If glazing or burning should occur the abrasive has dulled and must be replaced.
Standard Professional
Grain Use Grade Grade
Part # / Qty Part # / Qty
20 grit For removing gross imperfections and restoring
evenness to old fl ooring. To remove build-up of 945950 / 10
paints and varnishes.
36 grit For fi rst sanding of new fl ooring (maple, oak).
For removing minor imperfections and fi nishes 945951 / 20
from old fl ooring.
60 grit For cleanup from initial cut 36 grit. 945954 / 20
60 grit 945960 / 20
screen mesh
80 grit For fi nal sanding of certain hardwoods. For 945955 / 20
80 grit cleanup of initial cuts (60 grit). 945961 / 20
screen mesh
100 grit For fi nal sanding of certain hardwoods and 945956 / 20
100 grit conifers where a smooth surface is desired. 945962 / 20
screen mesh
120 grit For fi nal sanding of certain hardwoods and
screen mesh conifers where a smooth surface is desired. 945963 / 20
For leveling after initial fi nish coat.
150 grit For scratching surface between coats of fi nish. 945964 / 20
screen mesh
180 grit For surface roughing between coats of fi nish.
screen mesh