Black & Decker G900K Operation, Adjusting the guard Fig. D, Switch, Spindle lock

ENGLISH • 19

Adjusting the guard (Fig. D)

Note: The guard is pre-adjusted to the diameter of the gear case hub at the factory. If, after a period of time, the guard becomes loose, tighten the adjusting screw (9) with latch in the closed position and guard installed on the tool.

Caution! Do not tighten the adjusting screw with the latch in the open position. Undetectable damage to the guard or the mounting hub may result.

Caution! If the guard cannot be tightened by the guard latch, do not use the tool and take the tool and guard to a service center to repair or replace the guard.

OPERATION

Switch

To start the grinder, push the slider switch (1) forward. For continuous operation, push the slider switch forward and push the front down until it locates in the lock position. To turn the tool off, press the rear of the slider switch. Spring action returns the switch to the off position.

Caution! Hold the side handle (4) and body of the tool firmly to maintain control of the tool at start up and during use and until the wheel or accessory stops rotating. Make sure the wheel has come to a complete stop be fore laying the tool down.

Caution! Allow the tool to reach full speed before touching tool to the work surface.

Lift the tool from the work surface before turning the tool off.

Spindle lock

The spindle lock button (5) is provided to prevent the spindle from rotating when installing or removing wheels. Operate the spindle lock only when the tool is turned off and the wheel has come to a complete stop.

Warning! Do not engage the spindle lock while the tool is operating. Damage to the tool will result and attached accessory may spin off possibly resulting in injury.

To engage the lock, depress the spindle lock button shown in Fig. E and rotate the spindle until you are unable to rotate the spindle further.

MOUNTING AND USING DEPRESSED CENTER GRINDING WHEELS AND SANDING FLAP DISCS Mounting and Removing Hubbed Wheels

Warning! To prevent accidental operation, turn off and unplug tool before performing the following operations. Failure to do this could result in serious personal injury.

Hubbed wheels install directly on the 5/8 in.-11 threaded spindle.

1.Thread the wheel on the spindle by hand.

2.Depress the spindle lock button and use a wrench (Fig. E) to tighten the hub of the wheel.

3.Reverse the above procedure to remove the wheel.

Caution! Failure to properly seat the wheel before turning the tool on may result in damage to the tool or the wheel.

Mounting Non-Hubbed wheels

Warning! To prevent accidental operation, turn off and unplug tool before performing the following operations. Failure to do this could result in serious personal injury.

1.Figure F: Install the unthreaded backing flange (10) on spindle (11) with the raised section (pilot) against the wheel.

2.Place wheel against the backing flange, centering the wheel on the raised section (pilot) of the backing flange.

3.Figure G: While depressing the spindle lock button, thread the threaded clamp nut (12) on spindle.

►Figure H: If the wheel you are installing is more than 1/8 inch (3mm) thick, place the threaded clamp nut on the spindle so that the raised section (pilot) fits into the center of the wheel.

►Figure I: If the wheel you are installing is 1/8 inch (3mm) thick or less, place the threaded clamp nut on the spindle so that the raised section (pilot) is not against the wheel.

4.While depressing the spindle lock button (5), tighten the threaded clamp nut with included wrench.

5.To remove the wheel, depress the spindle lock button and loosen the threaded clamp nut with included wrench.

Note: If the wheel spins after the threaded clamp nut is tightened, check the orientation of the threaded clamp nut. If a thin wheel is installed with the pilot on the clamp nut against the wheel, it will spin because the height of the pilot prevents the clamp nut from holding the wheel.

Surface grinding with grinding wheels

1.Allow the tool to reach full speed before touching the tool to the work surface.

2.Apply minimum pressure to the work surface, allowing the tool to operate at high speed. Grinding rate is greatest when the tool operates at high speed.

3.Figure J: Maintain a 20˚ to 30˚ angle between the tool and work surface.

4.Continuously move the tool in a forward and back motion to avoid creating gouges in the work surface.

5.Remove the tool from work surface before turning tool off. Allow the tool to stop rotating before laying it down.