HiKOKI GT13 Benchtop Electric Grinder User Manual

1. Introduction

Thank you for choosing the HiKOKI GT13 Benchtop Electric Grinder. This manual provides essential information for the safe and effective operation, maintenance, and troubleshooting of your new tool. Please read this manual thoroughly before operating the grinder and keep it for future reference. Proper understanding and adherence to these instructions will ensure optimal performance and extend the lifespan of your GT13 grinder.

2. Safety Instructions

Always observe basic safety precautions to reduce the risk of fire, electric shock, and personal injury. This section outlines general power tool safety and specific safety guidelines for benchtop grinders.

2.1 General Power Tool Safety

• Work Area Safety: Keep the work area clean and well-lit. Cluttered or dark areas invite accidents. Do not operate power tools in explosive atmospheres, such as in the presence of flammable liquids, gases, or dust.
• Electrical Safety: Power tool plugs must match the outlet. Never modify the plug in any way. Avoid body contact with earthed or grounded surfaces, such as pipes, radiators, ranges, and refrigerators.
• Personal Safety: Always wear eye protection. Use hearing protection when operating noisy tools. Dress properly; avoid loose clothing or jewelry that can get caught in moving parts.
• Tool Use and Care: Do not force the power tool. Use the correct power tool for your application. Disconnect the plug from the power source before making any adjustments, changing accessories, or storing power tools.

2.2 Benchtop Grinder Specific Safety

• Grinding Wheels: Use only grinding wheels rated for the maximum RPM of the grinder. Inspect wheels for cracks or damage before each use. Never use a damaged wheel.
• Guards and Rests: Ensure all guards are in place and securely fastened before operation. Adjust tool rests to within 1/16 inch (1.6 mm) of the grinding wheel to prevent workpieces from jamming.
• Workpiece Handling: Always hold the workpiece firmly against the tool rest. Do not grind on the side of the wheel unless the wheel is specifically designed for side grinding.
• Spark Direction: Position the grinder so that sparks are directed away from flammable materials and other personnel.
• Vibration: Excessive vibration may indicate a damaged or unbalanced wheel. Stop the grinder immediately and inspect the wheel.

3. Components and Features

The HiKOKI GT13 Benchtop Electric Grinder is designed for various grinding and sharpening tasks. Familiarize yourself with its main components:

• Grinding Wheels: Two wheels, typically one coarse (#36 grit) and one fine (#60 grit), for different grinding needs.
• Wheel Guards: Protective covers around the grinding wheels.
• Tool Rests: Adjustable platforms to support workpieces during grinding.
• Spark Guards/Eye Shields: Transparent shields to protect the operator from sparks and debris.
• Motor Housing: Encloses the electric motor.
• Power Switch: On/Off switch for operation.
• Base: Sturdy base for mounting the grinder to a workbench.

Figure 3.1: Front view of the HiKOKI GT13 Benchtop Electric Grinder, showing the two grinding wheels, adjustable tool rests, and transparent spark guards.

Figure 3.2: Rear view of the HiKOKI GT13 Benchtop Electric Grinder, highlighting the power cord connection and the sturdy base designed for secure mounting.

Figure 3.3: Size comparison of the HiKOKI GT13 Benchtop Electric Grinder, indicating its compact yet robust dimensions suitable for various workshop environments.

4. Setup and Assembly

Before operating your grinder, ensure it is properly set up and secured.

1. Unpacking: Carefully remove the grinder and all accessories from the packaging. Inspect for any shipping damage.
2. Mounting: Securely bolt the grinder to a sturdy workbench using the mounting holes in the base. This prevents the grinder from moving during operation.
3. Attaching Tool Rests: Attach the tool rests to their respective sides. Adjust them so that the gap between the tool rest and the grinding wheel is no more than 1/16 inch (1.6 mm). This minimizes the risk of the workpiece being pulled into the gap.
4. Installing Spark Guards/Eye Shields: Mount the transparent spark guards. Adjust their position to provide maximum protection without obstructing your view of the workpiece.
5. Electrical Connection: Ensure the power switch is in the "OFF" position. Plug the grinder into a grounded 100V AC outlet.

5. Operating Instructions

Follow these steps for safe and effective operation of your HiKOKI GT13 grinder.

1. Pre-Operation Check: Before each use, verify that all guards and tool rests are securely in place and properly adjusted. Ensure the work area is clear of obstructions.
2. Starting the Grinder: Turn the power switch to the "ON" position. Allow the grinder to reach full operating speed before beginning any work.
3. Grinding Technique:
   • Hold the workpiece firmly against the tool rest.
   • Apply light, even pressure to the grinding wheel. Do not force the workpiece against the wheel, as this can cause overheating, damage the wheel, or reduce motor life.
   • Move the workpiece slowly and consistently across the face of the wheel to ensure even wear and prevent grooving.
   • Use the coarse wheel (#36 grit) for rapid material removal and the fine wheel (#60 grit) for finishing and sharpening.
4. Cooling Workpiece: For metal grinding, frequently dip the workpiece in water to prevent overheating, which can alter the metal's properties.
5. Stopping the Grinder: Turn the power switch to the "OFF" position. Wait for the wheels to come to a complete stop before leaving the grinder unattended or performing any adjustments.

6. Maintenance

Regular maintenance ensures the longevity and safe operation of your grinder. Always disconnect the power cord before performing any maintenance.

• Cleaning: Regularly clean dust and debris from the grinder, especially around the motor vents, using compressed air or a soft brush.
• Wheel Dressing: Over time, grinding wheels can become glazed or out of round. Use a wheel dresser to restore the wheel's cutting surface and true its shape. This should be done with the grinder running and proper safety precautions.
• Wheel Replacement: Replace grinding wheels when they become too small, worn, or damaged. Ensure replacement wheels match the specifications (diameter, arbor hole, thickness, and maximum RPM) of the original wheels.
• Tool Rest Adjustment: Periodically check and adjust the tool rests to maintain the proper 1/16 inch (1.6 mm) gap from the grinding wheel.
• Power Cord Inspection: Inspect the power cord for any signs of damage, cuts, or fraying. Replace if damaged.

7. Troubleshooting

This section provides solutions to common issues you might encounter with your HiKOKI GT13 grinder.

8. Specifications

Key technical specifications for the HiKOKI GT13 Benchtop Electric Grinder:

9. Warranty and Support

For warranty information, technical support, or service inquiries, please contact HiKOKI customer service or visit the official HiKOKI website. Keep your purchase receipt as proof of purchase.

Official HiKOKI Website: www.hikoki-powertools.com