Tools / Power Tools
HiKOKI G 10SR4 / G 12SR4 / G 13SR4 Disc Grinder
Comprehensive handling and safety instructions for the HiKOKI G 10SR4, G 12SR4, and G 13SR4 series disc grinders, covering operation, maintenance, and safety warnings.
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The HiKOKI G 10SR4, G 12SR4, and G 13SR4 are high-performance disc grinders designed for professional use. They are primarily used for removing casting fins, finishing various steel, bronze, and aluminum materials, grinding welded sections, and cutting synthetic concrete, stone, brick, and marble.
Safety Precautions
General Safety: Always wear eye protection. Keep the work area clean and well-lit. Do not operate in explosive atmospheres. Keep children and bystanders away.
Electrical Safety: Ensure the power source matches the tool's nameplate. Use a residual current device (RCD) with a rated residual current of 30 mA or less. Do not abuse the power cord.
Operation Safety: Always use the provided guard. Do not use damaged accessories. Ensure the rated speed of the accessory is at least equal to the maximum speed of the grinder. Hold the tool by insulated gripping surfaces when performing operations where the cutting accessory may contact hidden wiring.
Operation
- Start-up: Ensure the switch is in the OFF position before connecting to power. Confirm the push button is disengaged before switching on.
- Grinding: Do not overload the machine by applying excessive pressure; the machine's weight is usually sufficient for effective grinding.
- Stopping: The wheel continues to rotate after the tool is switched off. Do not put the tool down until the wheel has come to a complete stop.
Maintenance
- Motor: Regularly blow air through the tail cover air hole while the motor runs without load to remove accumulated dust and dirt.
- Carbon Brushes: Inspection and replacement must be performed ONLY by a HiKOKI Authorized Service Center.
- Power Cord: If replacement is necessary, it must be done by an authorized service center to avoid safety hazards.
Manufacturer information
HiKOKI
Practical help
Common problems
Tool does not start
Check if the switch is in the ON position before plugging in, or if the power source is disconnected.
Excessive vibration
Stop the tool immediately, check the mounting of the wheel, and inspect for defects or damage.
Wheel binds or kicks back
Do not apply excessive pressure. Support large workpieces properly. If binding occurs, switch off the tool and investigate the cause.
Before use
- Ensure the power source matches the tool's nameplate.
- Check that the switch is in the OFF position.
- Inspect the grinding wheel for cracks or surface defects.
- Ensure the wheel is properly mounted and the nut is securely tightened.
- Confirm the push button is disengaged.
- Always wear eye and ear protection.
Specs in practice
- Rated Voltage
- The voltage required for the tool to operate (110V-240V).
- Wheel Outer Diameter
- The maximum size of the grinding wheel (100mm, 115mm, or 125mm depending on model).
Images and diagrams
- Fig 1: Fitting and adjusting the wheel guard.
- Fig 2: Fixing the side handle.
- Fig 3-5: Assembling different types of wheels (depressed center, cutting, diamond).
- Fig 6: Switch operation.
- Fig 7: Grinding angle and method.
Model compatibility
- Use only wheel types recommended for your specific model.
- When using an abrasive cutting wheel, remove the standard guard and attach the side guard (sold separately).
Manual page author
Emily Carter
User documentation editor
Prepares concise manual descriptions and highlights the most useful setup, operation, and maintenance information for readers.