Porter-Cable 444vs instruction manual Using the Sander, Fine Finishing

A

B

Fig. 15 Fig. 15A

USING THE SANDER

The Porter-Cable Profile Sander has been designed for one-hand operation (Fig. 16). The sander can be easily guided over the work surface with one hand. The normal weight of the machine is sufficient for efficient sanding. Additional pressure on the tool will slow down the speed of the pad, reduce the sanding efficiency, and put an additional burden on the motor.

The Profile Sander uses an “in-line” sanding motion. To achieve the best surface finish, sand “in-line” with the wood grain. Faster removal rates can be achieved by operating the sander across the grain while working out rough areas, and then finishing by sanding with the grain.

Fig. 16

FINE FINISHING

The action of the tool causes thousands of tiny abrasive grits to move against the work at high speed. Each grain moves in the same direction and at a constant speed, causing the cutting action to be uniform over the entire pad surface. Start the work with an abrasive grit just coarse enough to remove the high spots and excessive roughness.

Follow with a second sanding using a grit one or two grades finer. Continue with successively finer grits until the desired finish is obtained. DO NOT GO FROM A COARSE GRIT TO A VERY FINE GRIT IN ONE STEP.

15