OPERATION

WARNING:

Always wear eye protection with side shields marked to comply with ANSI Z87.1, along with hearing protection. Failure to do so could result in objects being thrown into your eyes and other possible serious injuries.

WARNING:

Do not use any attachments or accessories not recom- mended by the manufacturer of this product. The use of attachments or accessories not recommended can result in serious personal injury.

APPLICATIONS

You may use this product for the purpose listed below:

Grinding metals

Sanding wood or metal surfaces

WARNING:

Battery products are always in operating condition. Therefore, the switch should always be locked when not in use or carrying at your side.

INSTALLING/REMOVING BATTERY PACK

See Figure 4, page 12.

To install:

Insert the battery pack.

Make sure the latches on each side of the battery pack snap in place and that battery pack is secured in the product before beginning operation.

To remove:

Depress the latches on each side of the battery pack.

LOCK-OFF BUTTON

See Figure 5, page 12.

The lock-off button is located on the handle above the switch trigger. You must depress the lock-off button in order to pull the switch trigger. The lock resets each time the trigger is released.

SWITCH TRIGGER

See Figure 5, page 12.

To turn the grinder ON, depress and hold lock-off button, then depress the switch trigger. To turn it OFF, release the switch trigger.

POSITIONING THE GUARD

See Figures 6 - 7, page 13.

The guard on the grinder should be correctly positioned depending on which side the handle is mounted. Never use the grinder without the guard correctly in place.

WARNING:

Never place the guard so that it is in front of the grinder. This could result in serious injury because sparks and loose particles thrown from the grinding wheel would be directed toward the operator. Always place the guard in the correct location as shown.

To reposition the guard:

Remove the battery pack.

Unlock the guard clasp by pulling the clasp out, away from the grinder.

 Rotate the guard to its correct position as shown.  Lock the guard clasp by pushing the clasp in.

NOTE: Be sure the raised ridge on the guard is seated in the groove on the bearing cap. Never use the grinder without the guard in place and properly adjusted.

OPERATING THE GRINDER

See Figure 8, page 13.

Always carefully select and use grinding wheels that are recommended for the material to be ground. Make sure that the minimum operating speed of any accessory wheel selected is 6,500 r/min. or more. The grinding wheel provided with the grinder is suitable for grinding welds, preparing surfaces to be welded, grinding structural steel, and grinding stainless steel.

To operate the grinder:

Secure all work in a vise or clamp to a workbench.

DANGER:

Never use the grinder with the guard removed. It has been designed for use only with the guard installed. Attempting to use grinder with guard removed will result in loose particles being thrown against the operator resulting in serious personal injury.

Hold the grinder in front and away from you with both hands, keeping the grinding wheel clear of the workpiece.

Turn on the grinder and let the motor and grinding wheel build up to full speed.

Lower the grinder gradually until the grinding wheel contacts the workpiece.

WARNING:

To prevent loss of control and possible serious personal injury, always operate the grinder with both hands, keeping one hand on the side handle.

Keep the grinder tilted at an angle from 5° to 15° and continuously moving at a steady, consistent pace.

9 — English

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Ryobi P421 Applications, INSTALLING/REMOVING Battery Pack, Switch Trigger, Positioning the Guard, Operating the Grinder