Makita 5402NA 16-5/16" Circular Saw Instruction Manual

1. General Safety Instructions

Always observe fundamental safety precautions when operating any power tool to reduce the risk of injury. This section outlines general safety guidelines applicable to the Makita 5402NA circular saw.

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. Power tools create sparks which may ignite the dust or fumes.
• Keep children and bystanders away while operating a power tool. Distractions can cause you to lose control.

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. There is an increased risk of electric shock if your body is earthed or grounded.
• Do not expose power tools to rain or wet conditions. Water entering a power tool will increase the risk of electric shock.

Personal Safety

• Always wear eye protection. Use safety glasses, goggles, or a face shield.
• Wear hearing protection when operating the saw.
• Dress properly. Do not wear loose clothing or jewelry. Keep your hair and clothing away from moving parts.
• Stay alert, watch what you are doing, and use common sense when operating a power tool.

Circular Saw Specific Safety

• Kickback Prevention: Maintain a firm grip with both hands on the saw. Position your body and arm to resist kickback forces. Kickback occurs when the blade binds, stalls, or misaligns in the cut.
• Blade Guards: Ensure the lower guard closes immediately after completing a cut. Never jam the lower guard open.
• Blade Selection: Use only sharp, correctly sized blades. Dull or damaged blades can cause binding and kickback.
• Workpiece Support: Always support the workpiece securely. Do not hold small pieces by hand.

2. Product Overview

The Makita 5402NA is a powerful 16-5/16 inch circular saw designed for heavy-duty cutting applications, particularly large timbers and lumber. It features a robust 15 AMP motor, delivering 2,200 RPM for efficient cutting performance.

Image: The Makita 5402NA 16-5/16 inch Circular Saw, showcasing its large blade and robust design.

Key features include an electric brake for increased productivity, a large depth control lever for secure and convenient adjustments, and an oversized trigger handle for comfortable operation. The saw also incorporates a blade stabilizer to ensure consistent blade rotation and superior cutting performance.

Image: Side view of the Makita 5402NA circular saw, highlighting its large blade and sturdy construction.

3. Setup and Assembly

Proper setup ensures safe and accurate operation of your circular saw.

Blade Installation and Removal

1. Disconnect Power: Always unplug the saw from the power source before performing any adjustments or maintenance.
2. Engage Shaft Lock: Locate and engage the shaft lock button to prevent the blade from rotating.
3. Loosen Arbor Bolt: Use the provided hex wrench to loosen the arbor bolt that secures the blade.
4. Remove Old Blade: Carefully remove the old blade, noting the direction of rotation.
5. Install New Blade: Place the new blade onto the arbor, ensuring the teeth are pointing in the direction of rotation indicated by the arrow on the saw and blade.
6. Tighten Arbor Bolt: Securely tighten the arbor bolt while holding the shaft lock.

Adjusting Cutting Depth

The saw features a large depth control lever for quick and secure adjustments.

Image: A hand adjusting the large depth control lever on the Makita 5402NA circular saw.

1. Unlock Lever: Loosen the large depth control lever.
2. Set Depth: Raise or lower the saw base to achieve the desired cutting depth. The blade should extend approximately 1/8 inch (3 mm) below the workpiece.
3. Lock Lever: Securely tighten the depth control lever to prevent movement during operation.

Adjusting Bevel Angle

The saw can make bevel cuts from 0 to 45 degrees.

1. Unlock Bevel Adjustment: Loosen the bevel adjustment knob or lever (refer to saw diagram for exact location).
2. Set Angle: Tilt the saw base to the desired bevel angle, aligning the indicator with the angle scale.
3. Lock Adjustment: Securely tighten the bevel adjustment knob or lever.

4. Operation

Follow these steps for safe and effective operation of your Makita 5402NA circular saw.

Starting the Saw

1. Grip: Hold the saw firmly with both hands, one on the main handle and the other on the large support handle.
2. Safety Button: Press the safety lock-off button.
3. Trigger: Squeeze the trigger switch to start the saw. Release the trigger to stop the saw.

Making Cuts

Image: The Makita 5402NA circular saw in action, cutting through a thick wooden beam.

1. Prepare Workpiece: Ensure the workpiece is securely clamped and supported to prevent movement and kickback. Mark your cut line clearly.
2. Position Saw: Place the front edge of the saw base plate on the workpiece, ensuring the blade is clear of the material.
3. Start Cut: Start the saw and allow the blade to reach full speed before engaging the material.
4. Feed Rate: Apply steady, even pressure to feed the saw through the material. Avoid forcing the saw, as this can lead to bogging down or poor cut quality.
5. Complete Cut: Continue through the cut, maintaining control. Ensure the lower blade guard retracts smoothly as the saw enters the material and closes upon exiting.

Cutting Large Timbers

This saw is designed for cutting large timbers. For optimal performance and safety:

• Ensure the timber is well-supported on saw horses or a stable workbench.
• Use a straight edge or guide clamped to the timber to ensure a straight cut, especially for long cuts.
• Allow the saw to do the work; do not push excessively hard.

5. Maintenance

Regular maintenance ensures the longevity and optimal performance of your Makita 5402NA circular saw.

Cleaning

• Disconnect Power: Always unplug the saw before cleaning.
• Remove Dust and Debris: Use a brush or compressed air to remove sawdust and debris from the motor vents, blade guard, and base plate. Accumulation can hinder performance and cause overheating.
• Clean Blade: Remove the blade and clean any resin or pitch buildup using a suitable blade cleaner.

Blade Care

• Inspect Blade: Regularly inspect the blade for dullness, missing teeth, or cracks. A dull blade can cause the saw to bog down, increase kickback risk, and produce poor cuts.
• Replace Dull Blades: Replace dull blades promptly. Do not attempt to sharpen severely damaged blades.
• Blade Stabilizer: Ensure the blade stabilizer is clean and free of debris to maintain consistent blade rotation.

Carbon Brush Replacement

The motor's carbon brushes wear down over time and require periodic inspection and replacement. Refer to the detailed service manual for specific instructions on accessing and replacing the carbon brushes.

6. Troubleshooting

This section addresses common issues you might encounter during the operation of your Makita 5402NA circular saw.

Saw Bogs Down or Cuts Slowly

• Dull Blade: Inspect the blade for sharpness. A dull blade is the most common cause of reduced cutting performance. Replace or sharpen the blade.
• Forcing the Cut: Reduce the feed rate. Allow the saw to cut at its own pace.
• Overloading: Ensure the saw is connected to an appropriate power circuit (15 AMP, 115V). Avoid using extension cords that are too long or too thin, which can cause voltage drop.
• Material Type: Some dense materials require a slower feed rate.

Blade Guard Issues

• Guard Binding: If the lower blade guard binds or does not retract smoothly, especially during certain bevel cuts, ensure it is clean and free of debris. In some specific cutting scenarios (e.g., 45-degree miter with blade at 90 degrees), manual assistance to retract the guard may be necessary. Always exercise extreme caution.
• Guard Not Closing: Clean the guard mechanism to ensure it can move freely and close completely after a cut.

Difficulty with Safety Button

• The safety lock-off button may be stiff or difficult to engage, particularly with gloves. Ensure a firm grip and deliberate action when pressing the button before squeezing the trigger.

7. Specifications

Detailed technical specifications for the Makita 5402NA 16-5/16" Circular Saw.

8. Warranty and Support

This section provides information regarding the product warranty and where to find additional support documents.

Warranty Information

The Makita 5402NA Circular Saw comes with a 1 Year Limited Warranty from the manufacturer. This warranty covers defects in materials and workmanship under normal use. Please retain your proof of purchase for warranty claims.

Support Documents

For more detailed information, diagrams, and specific service instructions, please refer to the official documents:

• User Guide (PDF)
• User Manual (PDF)

For further assistance, contact Makita customer support.