11.Causes and Operator Prevention of Kickback:

Kickback is a sudden reaction to a pinched, bound or misaligned saw blade, causing an uncontrolled saw to lift up and out of the workpiece toward the operator.

When the blade is pinched or bound tightly by the kerf closing down, the blade stalls and the motor reaction drives the unit rapidly back toward the operator.

If the blade becomes twisted or misaligned in the cut, the teeth at the back edge of the blade can dig into the top surface of the wood causing the blade to climb out of the kerf and jump back toward operator.

Kickback is the result of tool misuse and/or incorrect operating procedures or conditions and can be avoided by taking proper precautions as given below.

Maintain a firm grip with both hands on the saw and position your body and arm t o allow you t o resist KICKBACK forces. KICKBACK forces can be controlled by the operator, if proper precautions are taken.

When blade is binding, or when interrupting a cut for any reason, release the trigger and hold the saw motionless in the material until the blade comes t o a complete stop. Never attempt t o remove the saw from the work or pull the saw backward while the blade is in motion or KICKBACK may occur. Investigate and take corrective actions to eliminate the cause of blade binding.

When restarting a saw in the workpiece, center the saw blade in the kerf and check that saw teeth are not engaged into the material. If saw blade is binding, it may walk up or KICKBACK from the workpiece as the saw is restarted.

Support large panels t o minimize the risk of blade pinching and KICKBACK. Large panels tend to sag under their o w n weight. Supports must be placed under the panel on both sides, near the line of cut and near the edge of the panel as shown in Fig. 1.

To minimize the risk of blade pinching and kickback. When cutting operation requires the resting of the saw on the work piece, the saw shall be rested on the laraer Dortion and the smaller ece cut off.

To avoid kickback do support board or panel near the cut.

Fig. '

Don't support board or panel away from the cut.

Fig. :

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Makita 5630DWA, 5680DWB specifications Causes and Operator Prevention of Kickback
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5680DWB, 5630DWA specifications

The Makita 5630DWA and 5680DWB are two powerful cordless saws designed for precision cutting tasks in various applications. Both models are part of Makita's expansive range of cordless power tools, bringing together advanced technology and user-friendly features for enhanced performance.

The Makita 5630DWA is equipped with a 190mm blade, allowing it to make clean, accurate cuts in wood and other materials. It features a high-performance 18V Lithium-Ion battery, which provides ample power and a longer run time, making it ideal for extended use in demanding tasks. One of its standout features is the electronic brake, which stops the blade quickly after releasing the trigger, enhancing user safety and control.

Additionally, the 5630DWA comes with a built-in laser guide, ensuring precision in alignment and cutting, which is particularly beneficial for professional carpenters and DIY enthusiasts alike. The lightweight design of the saw contributes to reduced fatigue when used for prolonged periods, making it more comfortable to handle.

The Makita 5680DWB, on the other hand, is designed for more demanding tasks and features a slightly larger blade size, providing a deeper cutting capability. It also supports the same high-capacity 18V Lithium-Ion battery, ensuring that users receive consistent power for a variety of applications. One innovative technology in the 5680DWB is its automatic torque drive function, which adjusts cutting speed and torque based on the material being cut, optimizing performance and efficiency.

Another impressive feature of the 5680DWB is its adjustable cutting depth and bevel angle, allowing for versatile cutting options to meet the specific needs of any project. The tool's robust build quality ensures durability and longevity, making it a reliable addition to any toolkit.

Both models benefit from Makita’s commitment to user ergonomics, with soft-grip handles that provide comfort and control while reducing vibrations during use. Moreover, these cordless saws are compatible with a wide range of Makita accessories, enhancing their versatility.

In conclusion, the Makita 5630DWA and 5680DWB are exemplary tools that combined power, precision, and user-friendly features. Whether for professional use or home improvement, these saws stand out as reliable choices for anyone looking to take on cutting tasks effectively.
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