User Manual for HiKOKI G10BYEQ and G13BYEQ Disc Grinder

Quick guide from the manual

This manual provides essential instructions for the safe and effective operation of the HiKOKI G10BYEQ and G13BYEQ disc grinders. Before use, ensure the power source matches the nameplate requirements and that you are wearing appropriate personal protective equipment, including eye protection. Always test the grinder in a safe position for at least 1 minute (daily) or 3 minutes (after changing the wheel) before starting work.

Safety warnings

• Kickback protection: The tool automatically cuts power if the wheel speed drops suddenly (e.g., wheel lock).
• Overload/Overheat protection: The motor stops if overloaded or overheated. If this occurs, release the switch and allow the tool to cool down.
• Braking function: The electric brake activates when the switch is released. Hold the tool firmly as this may cause a slight kickback.
• 0 Voltage restart protection: Prevents the tool from restarting automatically after a power interruption.
• General safety: Do not use the tool near flammable materials or welding equipment. Always disconnect the power when not in use or before changing accessories.

Assembly and installation

Installing the wheel guard

The wheel guard must be mounted to protect the operator from broken wheel fragments.

• G10BYEQ: Loosen the screw, install the guard onto the packing gland, adjust to the desired angle, and tighten the screw securely.
• G13BYEQ: Set the assembly onto the packing gland, tighten the M5 hex socket bolt while the lever is in the closed position. Adjust the angle by releasing the lever.

Assembling the depressed center wheel

1. Turn the grinder upside down so the spindle faces upward.
2. Align the wheel washer with the spindle's notched part.
3. Fit the wheel onto the washer.
4. Screw the wheel nut onto the spindle.
5. Press the push button to lock the spindle and tighten the nut using the supplied wrench.

Operation

To switch on, slide the off-lock lever and press the switch lever. The grinder features a soft-start function. When grinding, use only the edge of the wheel at a 15° to 30° angle. Do not apply excessive pressure; the weight of the machine is usually sufficient for effective grinding.

Maintenance and inspection

Regularly inspect the wheel for cracks and ensure all mounting screws are tight. After approximately 50 hours of use, clean the filter set. Use an air blow gun to remove dust from the air holes and filter mesh. If the filter is damaged, replace it immediately. For power cord replacement, contact a HiKOKI Authorized Service Center.