Hitachi S18SB Instruction Manual - Page 11

English 9. Installing the air cover Install the air cover on the air vent on the side where the side handle is attached to divert the cooling air flow of the motor during operation as much as possible. Hook tab of the air cover to the air vent and push in the tab when installing. Use a screwdriver etc. to pull as shown in Fig. 2 when removing. DISC SANDER OPERATION Air cover Fig. 2 1. Hold the disc sander firmly by its body hadle and side handle (Fig. 1). The disc sander produces a counterforce which must be controlled by firmly holding onto the disc sander. 2. Switch operation This enables the disc sander always to be controlled with the hand gripping the machine for maximum safety during grinding operations. Switch ON: Press the switch trigger. Switch OFF: Release the switch trigger. Switch ON: Press the switch trigger. The switch trigger is locked by pushing on the locking button. Switch OFF: Press and release the switch trigger. 3. Use light grinding pressure. There is no need to press hard when grinding. Usually the disc sander's own weight is sufficient for the surface to be ground. CAUTION: Do not press the disc sander forcibly against the surface to be ground. Heavy pressure can damage the surface being ground or damage the disc sander's motor. 4. Use proper grinding angle. Use the disc sander by lifting 15° to 30°, as shown in Fig. 3. 5. Adjust operation to desired finish. For a fine finish, decrease pressure by lifting slightly. Grind slowly and at the appropriate speed. Fig. 3 15° - 30° 11