Operation, Torque, Using Control Switch Fig

OPERATION

WARNING!

To reduce the risk of injury, wear safety goggles or glasses with side shields.

Using Clutch (Fig. 3)

This tool has an adjustable clutch for driving different types of screws into different materials. When properly adjusted, the clutch will slip at a preset torque to prevent driving the screw too deep and to prevent damage to the screw or tool.

To adjust the clutch, turn the clutch adjusting ring to one of the twenty positions shown on the adjusting ring.

Fig. 3

Position

Clutchnumbers adjusting ring

The torque specifications shown here are approximate values obtained with a fully charged battery pack.

		Torque

	Positions 1 - 5	0 - 14 in. lbs.

	Positions 6 - 10	20 - 41 in. lbs.

	Positions 11 - 15	46 - 60 in. lbs.

	Positions 16 - 20	65 - 85 in. lbs.

	Drill
	Low	400 in. lbs.
	High	400 in. lbs.
	High	136 in. lbs.
		136 in. lbs.

NOTE: Because the above settings are only a guide, use a piece of scrap material to test the different clutch positions before driving screws into the workpiece.

Selecting Speed (Fig. 4)

The speed selector is on top of the motor housing. Allow the tool to come to a complete stop before changing speeds. See “Applications” for rec- ommended speeds under various conditions.

1.For Low speed (up to 450 RPM), push the speed selector forward (Position 1).

2.For High speed (up to 1,500 RPM), push the speed selector back (Position 2).

Starting, Stopping & Controlling Speed

1.To start the tool, pull the trigger.

2.To stop the tool, release the trigger and an electric brake stops the tool instantly.

All models feature variable speed control. To vary the speed, simply in- crease or decrease pressure on the trigger. The further the trigger is pulled, the greater the speed.

Using Control Switch (Fig. 5)

The control switch may be set to three positions: forward, reverse and lock. Due to a lockout mechanism, the control switch can only be ad- justed when the ON/OFF switch is not depressed. Always allow the motor to come to a complete stop before using the control switch.

Fig. 5	Reverse
	Reverse
	Cat. No. 0521-20

Forward

Trigger

Cat. No. 0522-20

Reverse

Forward (clockwise) rotation, push the control switch to the left position. Check the direction of rotation before use.

Reverse (counter clockwise) rotation, push the control switch to the right position. Check direction of rotation before use.

Locking the trigger, push the control switch to center position. The trig- ger will not work while the control switch is in the center locked position. Always lock the trigger or remove the battery pack before performing maintenance, changing accessories, storing the tool and any time the tool is not in use.

Fig. 4	Low		High

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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.