Woodstock W1773, W1772 owner manual Choosing Sandpaper, Grit Class

W1772/W1773 37" Drum Sander

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

36Extra 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.

OPERATIONS

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