Woodstock SHOP FOX W1772 - Manual (Page 29)

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W1772/W1773 37" Drum Sander
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Choosing Sandpaper
There are many types of sanding belts to choose from.
We recommend Aluminum Oxide for general workshop
environments. To the side is a chart that groups abrasives
into different classes, and shows which grits fall into each
class.
The general rule of thumb is to sand a workpiece with
progressively higher grit numbers, with no one grit
increase of more than 50. Avoid skipping grits; the larger
the grit increase, the harder it will be to remove the
scratches from the previous grit.
The Model W1772/W1773 allows you to place a differ-
ent grit sandpaper on each drum. The front drum should
have a coarser grit than the rear. Usually this translates
into combinations of successive group types. A common
selection for stock that is planed before being sanded is a
100/150 grit combination.
Ultimately, the type of wood you use and your stage of
finish will determine the best grit types to install on your
sander.
Grit Class Usage
36 Extra Coarse Rough sawn
boards, thick-
ness sand-
ing, and glue
removal.
60 Coarse Thickness
sanding and
glue removal.
80–100 Medium Removing
planer marks
and initial fin-
ish sanding.
120–180 Fine Finish sanding.