User Manual for HiKOKI G 13BYEQ2 Disc Grinder
Quick guide for the HiKOKI G 13BYEQ2 Disc Grinder. Includes setup, operation, maintenance, safety warnings, and technical specifications.
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This manual provides essential instructions for the safe and efficient operation of the HiKOKI G 13BYEQ2 Disc Grinder. Always read the safety warnings before use. Ensure the power source matches the specifications on the product nameplate. The tool features soft start, 0 voltage restart protection, constant speed, overload protection, and an electric brake system.
Safety Warnings
Read all safety warnings, instructions, illustrations, and specifications provided with this power tool. Failure to follow instructions may result in electric shock, fire, or serious injury. Always wear eye protection and use the tool with both hands. Do not use damaged accessories. Ensure the guard is securely attached and positioned for maximum safety.
Names of Parts

- Motor
- Nameplate
- Push button
- Side handle
- Gear cover
- Depressed center wheel
- Toolless wheel guard
- Switch lever
- Housing
- Tail cover
- Filter
Standard Accessories
- Wheel guard
- Guard clip
- Side handle
- Wrench
Applications
- Removal of casting fin and finishing of various types of steel, bronze, and aluminum materials and castings.
- Grinding of welded sections or sections cut by means of a cutting torch.
- Grinding of synthetic resins, slate, brick, marble, etc.
- Cutting of synthetic concrete, stone, brick, marble, and similar materials.
Specifications
- Voltage: 230 V
- Power Input: 1320 W
- Rated speed: 8500 min-1
- Wheel: 125 mm outer diameter, 22.23 mm hole diameter, 6 mm thickness
Mounting and Operation
Refer to the manual for detailed steps on attaching the guard clip, fitting the wheel guard, fixing the side handle, and assembling wheels. Always tighten the wheel nut with the included wrench before use. If the 0 voltage restart protection is activated, return the switch to the OFF position and wait at least 1 second before restarting.



Maintenance and Inspection
Always switch power OFF and disconnect the plug during maintenance. Regularly inspect the depressed center wheel for cracks and surface defects. Inspect mounting screws and ensure they are tight. Clean the filter periodically with a soft brush or air gun. If the filter is damaged, replace it. Motor maintenance is critical; ensure windings are not damaged or wet.

Noise and Vibration
Measured A-weighted sound power level: 93 dB (A). Measured A-weighted sound pressure level: 85 dB (A). Vibration total values determined according to EN62841.
Manufacturer information
HiKOKI
Practical help
Common problems
Release the switch, remove the cause of overload, then restart.
Release the switch, let the tool cool down for a few minutes, then restart.
Hold the main body securely when the switch is released as the electric brake engages.
Before use
- Ensure power source matches nameplate requirements.
- Check that the switch is in the OFF position.
- Inspect the depressed center wheel for cracks or defects.
- Ensure the wheel is properly mounted and the wheel nut is tightened.
- Confirm the push button is disengaged.
Images and diagrams
- Fig 1: Overview of parts
- Fig 3: Attaching/removing guard clip
- Fig 4: Fitting/adjusting wheel guard
- Fig 6/7: Assembling wheels
- Fig 9: Grinding angle (15-30 degrees)
Model compatibility
- Use only specified wheel types.
- Do not use segmented diamond cut-off wheels with segment slits > 10 mm.
- Use Type A guard for cut-off wheels.
- Use Type B guard for grinding wheels.
Manual page author
Emily Carter
User documentation editor
Prepares concise manual descriptions and highlights the most useful setup, operation, and maintenance information for readers.