Tools / Power Tools
HiKOKI G 10BYEQ / G 13BYEQ Disc Grinder Instruction Manual
Comprehensive user manual for the HiKOKI G 10BYEQ and G 13BYEQ disc grinders, covering safety, assembly, operation, and maintenance.
Table of contents
Product Overview
The HiKOKI G 10BYEQ and G 13BYEQ are high-performance disc grinders designed for professional use. These tools are engineered for grinding welded sections, removing casting fins, and finishing various materials including steel, bronze, aluminum, and synthetic resins. They are also capable of cutting through stone, brick, and marble when equipped with appropriate accessories.
Safety Guidelines
Safety is paramount when operating power tools. Always wear personal protective equipment, including eye protection, dust masks, and hearing protection. Ensure the work area is clean, well-lit, and free of flammable materials. Never operate the tool in explosive atmospheres. Always disconnect the power source before performing any adjustments, changing accessories, or when the tool is not in use. Be aware of kickback risks; maintain a firm grip and use the auxiliary handle provided.
Operation and Usage
Before starting, ensure the power source matches the tool's specifications. Always test the grinder by running it at no-load for at least one minute before beginning work. When grinding, maintain an angle of 15 to 30 degrees to the workpiece, using only the edge of the depressed center wheel. Do not apply excessive pressure, as the weight of the machine is generally sufficient for effective grinding. The tool features an electronic control system, including soft-start, kickback protection, and an electric brake that activates when the switch is released.
Maintenance and Inspection
Regular maintenance is essential for the longevity and safety of your grinder. Periodically inspect the grinding wheel for cracks or defects. Keep the ventilation openings clear of dust and debris. After approximately 50 hours of use, clean the filter set using an air blow gun. If the power cord is damaged, it must be replaced by an authorized service center. Always ensure that all mounting screws are properly tightened before operation.
Troubleshooting and Protection
The grinder is equipped with several protective features, including overload, overheat, and 0-voltage restart protection. If the motor overheats, the tool will stop; release the switch and allow it to cool for a few minutes before resuming. If the tool stops due to protection features, return the switch to the OFF position and wait at least one second before restarting.
Manufacturer information
HiKOKI
Practical help
Common problems
Motor stops during operation
Overload or overheat protection may have activated. Release the switch, allow the tool to cool, and ensure you are not applying excessive pressure.
Tool does not restart after power interruption
The 0-voltage restart protection is active. Turn the switch to OFF, wait at least one second, then turn it back ON.
Excessive vibration
Check if the grinding wheel is properly mounted, tightened, or damaged. Replace the wheel if necessary.
Before use
- Ensure the power source matches the tool's nameplate.
- Check that the power switch is in the OFF position.
- Inspect the grinding wheel for cracks or surface defects.
- Ensure the wheel guard is securely mounted.
- Verify the side handle is properly attached.
- Perform a no-load test run for at least 1 minute.
- Wear appropriate eye and ear protection.
Specs in practice
- Peripheral Speed
- The speed at the edge of the wheel (72 m/s for G10BYEQ, 80 m/s for G13BYEQ).
Images and diagrams
- Fig 1: Shows the correct installation of the wheel guard with side guard.
- Fig 2/3: Illustrates the mounting process for the wheel guard on G10BYEQ and G13BYEQ models.
- Fig 6: Explains the switch operation and locking mechanism.
- Fig 7: Demonstrates the correct grinding angle (15-30 degrees) and direction.
- Fig 8/9: Details the assembly of the depressed center wheel, diamond wheel, or cutting wheel.
Model compatibility
- Use only accessories recommended by the manufacturer.
- Do not use separate reducing bushings or adapters for large hole wheels.
- Ensure the thread of the wheel is long enough for the spindle length.
- Do not use cutting-off wheels for side grinding.
Manual page author
David Miller
Documentation analyst
Organizes user manual content into clear summaries, with attention to model details, product context, and everyday usability.