Applications

Using Keyless Chucks (Fig. 6)

Always remove the battery pack or lock the trigger before inserting or removing bits.

Fig. 6	Collar
	Sleeve

1.To open the chuck jaws, hold the collar while turning the sleeve in the counterclockwise direction.

When using drill bits, allow the bit to strike the bottom of the chuck. Center the bit in the chuck jaws and lift it about 1/16" off of the bot- tom.

When using screwdriver bits, insert the bit far enough for the chuck jaws to grip the hex of the bit.

2.To close the chuck jaws, hold the collar while turning the sleeve in the clockwise direction. Tighten securely.

3.To remove the bit, hold the collar while turning the sleeve in the coun- terclockwise direction.

WARNING!

To reduce the risk of electric shock, check work area for hidden pipes and wires before drilling or driving screws.

Drilling

Set the clutch adjusting ring to the drill position. Place the bit on the work surface and apply firm pressure before starting. Too much pressure will slow the bit and reduce drilling efficiency. Too little pressure will cause the bit to slide over the work area and dull the point of the bit.

If the tool begins to stall, reduce pressure slightly to allow the bit to regain speed. If the bit binds, reverse the motor to free the bit from the work- piece.

Drilling in Wood, Composition Materials and Plastic

When drilling in wood, composition materials and plastic, start the drill slowly, gradually increasing speed as you drill. When drilling into wood, use wood augers or twist drill bits. Always use sharp bits. When using twist drill bits, pull the bit out of the hole frequently to clear chips from the bit flutes. To reduce the chance of splintering, back work with a piece of scrap wood. Select low speeds for plastics with a low melting point.

Drilling in Metal

When drilling in metal, use high speed steel twist drills or hole saws. Use a center punch to start the hole. Lubricate drill bits with cutting oil when drilling in iron or steel. Use a coolant when drilling in nonferrous metals such as copper, brass or aluminum. Back the material to prevent binding and distortion on breakthrough.

Driving Screws and Nut Running

Drill a pilot hole when driving screws into thick or hard materials. Set the clutch adjusting ring to the proper position and set the speed to low. Use the proper style and size screwdriver bit for the type of screw you are using.

With the screwdriver bit in the screw, place the tip of the screw on the workpiece and apply firm pressure before pulling the trigger. Screws can be removed by reversing the motor.

Overloading

Continuous overloading may cause permanent damage to tool or battery pack.

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0522-20, 0521-20 specifications

Milwaukee 0521-20 and 0522-20 are powerful and versatile tools specifically designed for heavy-duty drilling and fastening tasks. These models are well-regarded in the industry for their innovative features, robust design, and advanced technologies that cater to professional contractors and DIY enthusiasts alike.

One of the main features of the Milwaukee 0521-20 is its strong motor, which delivers high torque and speed, making it ideal for tackling tough materials such as wood, metal, and masonry. The tool is equipped with a variable speed trigger that allows users to adjust the drilling speed to match the specific requirements of their project. This ensures precision and control, especially when working with delicate materials or when exact hole placement is necessary.

The Milwaukee 0522-20 model, on the other hand, stands out with its enhanced performance capabilities. It incorporates an advanced brushless motor technology, which not only increases efficiency but also extends the tool's lifespan by minimizing wear and tear. This brushless motor translates to higher runtime and torque, making it particularly suitable for prolonged use and demanding applications.

Another remarkable characteristic of both models is their compact and lightweight design. This feature enhances maneuverability, allowing users to work in tight spaces without sacrificing performance. Additionally, the ergonomic grip ensures comfort during extended periods of use, reducing operator fatigue.

Both Milwaukee tools come with advanced battery technology, utilizing the REDLITHIUM battery packs that provide longer run times and increased power. The fuel gauge embedded in the battery pack allows users to monitor battery life at a glance, preventing unexpected downtime.

In terms of durability, Milwaukee has engineered both models with high-quality materials and a robust construction that can withstand the rigors of job site environments. They are built to endure impacts, drops, and exposure to harsh conditions, ensuring that users can rely on them for consistent performance over time.

Overall, the Milwaukee 0521-20 and 0522-20 models represent a blend of innovation and practicality, making them essential tools for anyone serious about drilling and fastening tasks. With their cutting-edge technologies, impressive power, and ergonomic designs, these tools are poised to meet the demands of various projects, delivering exceptional results every time.