HiKOKI C6MB4(N) 165mm Circular Saw Instruction Manual

1. Introduction

This manual provides essential instructions for the safe and efficient operation, maintenance, and troubleshooting of your HiKOKI C6MB4(N) 165mm Circular Saw. Please read this manual thoroughly before using the tool and keep it for future reference. Understanding and following these instructions will help ensure safe operation and prolong the life of your tool.

2. Safety Instructions

Always prioritize safety when operating power tools. Failure to follow these safety guidelines may result in electric shock, fire, and/or serious injury.

General Power Tool Safety

• Work Area Safety: Keep your 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 appropriate personal protective equipment (PPE) including safety glasses, hearing protection, and a dust mask. 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 power plug from the power source before making any adjustments, changing accessories, or storing the tool.

Circular Saw Specific Safety

• Blade Selection: Use only saw blades specified for this circular saw. Ensure the blade is sharp, clean, and free from damage.
• Kickback Prevention: Be aware of potential kickback, which is a sudden reaction to a pinched, bound, or misaligned saw blade. Maintain a firm grip on the tool with both hands.
• Hand Placement: Keep hands away from the cutting area and the rotating blade. Never reach underneath the workpiece.
• Workpiece Support: Always secure the workpiece firmly before cutting. Do not hold small workpieces by hand.
• Guard Operation: Ensure the blade guard operates smoothly and returns to its closed position automatically. Never bypass or disable safety guards.

3. Components

Your HiKOKI C6MB4(N) circular saw consists of several key components. Familiarize yourself with each part for safe and effective operation.

Figure 3.1: Front view of the HiKOKI C6MB4(N) 165mm Circular Saw.

Figure 3.2: Side view of the HiKOKI C6MB4(N) 165mm Circular Saw, showing the blade and base plate.

Key Parts:

• Handle: Ergonomically designed for comfortable grip and control.
• Trigger Switch: Activates the motor.
• Blade Guard (Upper and Lower): Protects the user from the rotating blade. The lower guard retracts during cutting.
• Saw Blade: 165mm diameter blade for cutting wood. (Tip saw sold separately)
• Base Plate: Provides stability and guides the saw along the workpiece.
• Depth Adjustment Lever: Used to set the desired cutting depth.
• Bevel Adjustment Lever: Used to set the desired cutting angle (bevel).
• LED Light: Illuminates the cutting line for improved visibility.
• Power Cord: 2-core, 5m cord for AC100V power supply.
• Brake Mechanism: Quickly stops the blade after the trigger is released.

4. Setup

Proper setup is crucial for safe and accurate cutting. Always ensure the tool is disconnected from the power source before performing any adjustments.

4.1 Blade Installation/Replacement

1. Disconnect Power: Always unplug the saw from the power outlet before installing or replacing the blade.
2. Open Blade Guard: Lift the lower blade guard and secure it in the open position if possible, or hold it open manually.
3. Loosen Blade Bolt: Use the provided box spanner to loosen the blade bolt. Turn the bolt in the direction indicated on the saw (usually clockwise for loosening).
4. Remove Old Blade: Carefully remove the blade bolt, outer washer, and the old saw blade.
5. Install New Blade: Place the new 165mm saw blade onto the arbor, ensuring the teeth are pointing in the correct direction (usually indicated by an arrow on the blade and the saw).
6. Secure Blade: Reinstall the outer washer and blade bolt. Tighten the blade bolt firmly using the box spanner, turning counter-clockwise.
7. Close Guard: Release the lower blade guard, ensuring it moves freely and covers the blade completely.

4.2 Cutting Depth Adjustment

Adjusting the cutting depth prevents unnecessary blade exposure and reduces the risk of kickback.

1. Loosen Lever: Locate the depth adjustment lever (or knob) on the side of the saw and loosen it.
2. Set Depth: Raise or lower the base plate until the blade extends approximately 3-6mm (1/8 to 1/4 inch) below the workpiece.
3. Tighten Lever: Securely tighten the depth adjustment lever to lock the setting.

4.3 Bevel Angle Adjustment

The saw can make bevel cuts up to 45 degrees.

1. Loosen Lever: Locate the bevel adjustment lever (or knob) at the front of the saw and loosen it.
2. Set Angle: Tilt the base plate to the desired angle, aligning the indicator with the angle scale.
3. Tighten Lever: Securely tighten the bevel adjustment lever to lock the setting.

5. Operating Instructions

Follow these steps for safe and effective operation of your circular saw.

5.1 Pre-Operation Check

• Inspect the saw blade for sharpness, cracks, or missing teeth.
• Ensure the blade guard operates smoothly and returns to its closed position.
• Check the power cord for any cuts, fraying, or exposed wires.
• Confirm all depth and bevel adjustments are securely tightened.

5.2 Basic Cutting

1. Secure Workpiece: Clamp the workpiece firmly to a stable surface, ensuring it will not shift during the cut.
2. Align Saw: Position the saw on the workpiece, aligning the blade with your cutting line. Ensure the base plate is flat on the material.
3. Start Motor: Depress the trigger switch to start the motor. Allow the blade to reach full speed before making contact with the workpiece.
4. Make Cut: Guide the saw smoothly and steadily through the workpiece. Do not force the saw; let the blade do the work. Maintain a firm grip with both hands.
5. Complete Cut: Once the cut is complete, release the trigger switch. Allow the blade to stop completely before lifting the saw from the workpiece.

5.3 Using the Brake

The HiKOKI C6MB4(N) is equipped with an electric brake that stops the blade quickly after the trigger is released. This feature enhances safety by reducing the time the blade is exposed and spinning freely, and improves efficiency by allowing quicker repositioning for the next cut.

5.4 Using the LED Light

The integrated LED light automatically illuminates the cutting line when the saw is powered on. This provides improved visibility in dimly lit work areas, helping to ensure accurate cuts.

6. Maintenance

Regular maintenance helps ensure the longevity and safe operation of your circular saw. Always disconnect the tool from the power source before performing any maintenance.

6.1 Cleaning

• Regularly clean the saw to remove sawdust and debris from the motor housing, vents, and blade guard.
• Use compressed air to clear dust from vents and moving parts.
• Wipe down the exterior with a damp cloth. Do not use harsh solvents or abrasive cleaners, as they may damage plastic parts.

6.2 Blade Care

• Inspect the saw blade for dullness, cracks, or missing teeth before each use.
• A dull blade can cause kickback, overheating, and poor cut quality. Replace damaged or dull blades promptly with appropriate replacements.
• Clean resin and pitch buildup from the blade using a suitable blade cleaner.

6.3 Power Cord Inspection

• Periodically inspect the power cord for any signs of damage, such as cuts, abrasions, or exposed wires.
• If the power cord is damaged, it must be replaced by a qualified service technician to avoid electrical hazards.

7. Troubleshooting

This section addresses common issues you might encounter with your circular saw.

7.1 Saw Does Not Start

• Check Power Connection: Ensure the power cord is securely plugged into a functional outlet.
• Trigger Switch: Make sure the trigger switch is fully depressed.
• Power Supply: Verify that the power outlet is receiving electricity.
• If the issue persists after checking these points, consult a qualified technician.

7.2 Poor Cut Quality or Excessive Vibration

• Blade Condition: Inspect the blade for damage, dullness, or resin buildup. Replace or clean the blade as necessary.
• Blade Installation: Ensure the blade is correctly installed and the blade bolt is securely tightened.
• Workpiece Security: Verify that the workpiece is securely clamped and not moving during the cut.
• If vibration continues, the blade might be unbalanced or the tool may require servicing.

7.3 Blade Stops Prematurely During Cut

• Overload: This could indicate an overloaded motor. Reduce cutting pressure or use a sharper blade.
• Power Supply: Ensure the power supply is adequate and stable.
• Blade Binding: Check if the blade is binding in the workpiece due to improper alignment or a dull blade.

8. Specifications

The following table outlines the technical specifications for the HiKOKI C6MB4(N) 165mm Circular Saw.

9. Warranty and Support

For detailed warranty information, please refer to the warranty card or documentation included with your purchase. In case of technical issues, repairs, or questions not covered in this manual, please contact your authorized HiKOKI dealer or the manufacturer's customer support. Do not attempt to repair the tool yourself, as this may void the warranty and pose safety risks.