Milwaukee 5546-21 Operator's Manual

Pages 24

Year 2022

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Milwaukee 5546-21 Hammer Specification

The Milwaukee 5546-21 is a robust rotary hammer designed for heavy-duty applications. It features a powerful 10.5-amp motor, delivering up to 4.9 ft-lbs of impact energy, making it suitable for drilling in tough materials such as concrete and masonry. The tool operates at a variable speed range between 0 to 450 RPM and 0 to 3,000 BPM, providing versatility for different drilling and chiseling tasks. It supports three operational modes: rotary hammer, hammer only, and rotation only, allowing users to adapt to a wide range of job site requirements.

This rotary hammer includes an anti-vibration system that reduces user fatigue during prolonged use, enhancing comfort and control. The mechanical clutch protects the motor and gear system by disengaging gears if the bit binds, ensuring durability and longevity of the tool. The tool's SDS-Max bit system facilitates easy and secure bit changes without additional tools, optimizing workflow efficiency.

The Milwaukee 5546-21 is also equipped with a soft-start feature for precise bit placement and a constant power technology that maintains consistent performance under load. Its ergonomic design, complemented by a side handle, provides additional stability and control during operation. The tool comes with a carrying case for convenient transport and storage, ensuring it is safeguarded between uses. Overall, the Milwaukee 5546-21 rotary hammer is engineered to deliver high performance and reliability for professional users in demanding construction environments.

Milwaukee 5546-21 Hammer F.A.Q.

What is the maximum drilling capacity of the Milwaukee 5546-21 Hammer in concrete?

The Milwaukee 5546-21 Hammer has a maximum drilling capacity of 1-9/16 inches in concrete when using a solid bit.

How can I change the drill bit on the Milwaukee 5546-21 Hammer?

To change the drill bit, first ensure the tool is powered off and unplugged. Then, pull back the chuck collar and insert the new bit into the chuck, making sure it is properly seated before releasing the collar.

What maintenance is required for the Milwaukee 5546-21 Hammer?

Regular maintenance includes checking the power cord for damage, cleaning the tool after use, and periodically inspecting and lubricating the chuck mechanism to ensure smooth operation.

How do I troubleshoot the hammering function not working on my Milwaukee 5546-21?

If the hammering function is not working, check to ensure the tool is set to the hammer mode. Inspect the bit to ensure it's compatible and properly seated. If issues persist, the tool may require professional service.

Can the Milwaukee 5546-21 Hammer be used for chiseling?

Yes, the Milwaukee 5546-21 Hammer includes a chiseling mode, which allows it to be used for light demolition and chipping applications.

What are the safety precautions when using the Milwaukee 5546-21 Hammer?

Always wear safety goggles and ear protection. Ensure the work area is clear and stable. Never use the tool in wet conditions and always disconnect it from power before changing bits or performing maintenance.

How do I handle overheating issues with the Milwaukee 5546-21 Hammer?

If the tool overheats, stop usage immediately and allow it to cool down. Check for blockages in the vents and ensure the tool is not being overloaded. If overheating persists, consult a professional technician.

What is the recommended extension cord gauge for the Milwaukee 5546-21 Hammer?

For optimal performance, use a 12-gauge extension cord for lengths up to 100 feet. Using a cord with a lower gauge number (thicker wire) will help prevent power loss and overheating.

How do I store the Milwaukee 5546-21 Hammer properly?

Store the tool in a cool, dry place away from direct sunlight and moisture. Use the carrying case provided to protect it from dust and damage. Ensure the tool is clean and the power cord is coiled neatly.

What type of grease should be used for the Milwaukee 5546-21 Hammer?

Use a high-quality, lithium-based grease for lubricating the chuck and moving parts. Refer to the manufacturer's manual for specific recommendations to ensure compatibility and performance.