Save These Instructions for Future USE, Operation

V			volts	A			amperes
Hz			hertz	W			watts
min			minutes			or AC	alternating current
		or DC	direct current			or AC/DC	alternating or direct current
		or DC	direct current			or AC/DC	alternating or direct current
			Class I Construction	no			no load speed

	...................
.......................			(grounded)	n			rated speed
			Class II Construction				earthing terminal

	...................				.......................
			(double insulated)		........................		safety alert symbol
…/min			per minute	BPM			beats per minute
IPM			impacts per minute	RPM			revolutions per minute
SPM			strokes per minute	sfpm			surface feet per minute

SAVE THESE INSTRUCTIONS FOR FUTURE USE

Motor

Be sure your power supply agrees with the nameplate marking. Voltage decrease of more than 10% will cause loss of power and overheating. DEWALT tools are factory tested; if this tool does not operate, check power supply.

COMPONENTS (FIG. 1)

WARNING: Never modify the power tool or any part of it. Damage or personal injury could result.

A. Trigger switch	D.	Side handle
B. Locking button	E.	Selector dial
C. Reversing lever	F.	Depth rod

INTENDED USE

These heavy-duty hammerdrills are designed for professional drilling and hammerdrilling. DO NOT use under humid conditions or in presence of flammable liquids or gases.

These heavy-duty hammerdrills are professional power tools. DO NOT let children come into contact with the tool. Supervision is required when inexperienced operators use this tool.

Switch (Fig. 2)

To start hammerdrill, depress the trigger switch (A). To stop hammerdrill, release the switch.

To lock the trigger switch in the ON position for continuous operation, depress the trigger switch and push up the locking button (B). The tool will continue to run.

To turn the tool OFF from a locked on condition, squeeze and release the trigger once. Before using the tool (each time), be sure that the locking button release mechanism is working freely.

Do not lock the switch ON when drilling by hand so that you can instantly release the trigger switch if the bit binds in the hole. The locking button is for use only when the hammerdrill is mounted in a drill press stand or other wise held stationary. Be sure to release the locking mechanism before disconnecting the plug from the power supply. Failure to do so will cause the hammerdrill to start immediately the next time it is plugged in. Damage or injury could result.

VARIABLE SPEED TRIGGER SWITCH (FIG. 2)

The variable speed trigger switch (A) permits speed control. The farther the trigger switch is depressed, the higher the speed of the hammerdrill.

NOTE: Use lower speeds for starting holes, drilling in plastics or ceramics or driving screws.

REVERSING LEVER (FIG. 2)

The reversing lever (C), located above the trigger switch, changes the direction of rotation of the hammerdrill and is used when backing out screws and jammed drill bits.

To operate the tool in reverse, release the trigger switch and push the lever to the left (when viewed from the chuck end).

To operate the drill in forward, release the trigger switch and push the lever to the right (when viewed from the chuck end).

Return the reversing lever to the forward position after all operations in reverse are completed.

Side Handle (Fig. 1)

WARNING: To reduce the risk of personal injury, ALWAYS operate the tool with the side handle properly installed. Failure to do so may result in the side handle slipping during tool operation and subsequent loss of control. Hold tool with both hands to maximize control.

A side handle (D) is supplied with this hammerdrill. It clamps to the front of the gear case as shown in Figure 1 and can be rotated 360˚ for right- or left- hand use.

After the side handle is rotated into position, it should be pushed rearward until the slots (G) on the lip of the side handle are aligned and fully engaged with the projecting tabs (H) on the underside of the gear case. The side handle is then securely clamped by turning clockwise until tight.

Hammer/Drill Selector (Fig. 1)

To switch the tool from the drilling mode to the hammering mode (or vice-versa) rotate the selector dial (E) on the applicable symbol shown in Figure 1. For straight drilling, align the drill bit symbol toward the chuck. For hammering, align the hammer symbol with the lever, as shown.

NOTE: The selector must be in either drill or hammer/drill mode at all times. There are no operable positions between the two modes.

Keyed Chuck (Fig. 1)

Open chuck jaws by turning collar with fingers and insert shank of bit about 3/4" (19 mm) into chuck

(I). Tighten chuck collar by hand. Place chuck key in each of the three holes, and tighten in clockwise direction. It’s important to tighten chuck with all three holes to prevent slippage. To release bit, turn chuck key counterclockwise in just one hole, then loosen the chuck by hand. Any authorized DEWALT service center can install a keyless chuck in place of a keyed chuck.

Depth Rod (Fig. 1)

To adjust the depth rod, loosen the side handle (D) and move depth rod (F) so that the distance between the end of the rod and the end of the bit equals the desired drilling depth. When drilling with depth rod, stop when end of rod reaches surface of material.

OPERATION

WARNING: To reduce the risk of injury, turn unit off and disconnect it from power source before installing and removing accessories, before adjusting or when making repairs. An accidental start-up can cause injury.

WARNING: To reduce the risk of personal injury, ALWAYS ensure workpiece is anchored or clamped firmly. If drilling thin material, use a wood “back-up” block to prevent damage to the material.

WARNING: Do not attempt to tighten or loosen drill bits (or any other accessory) by gripping the front part of the chuck and turning the tool on. Damage to the chuck and personal injury may occur.

WARNING: Burn Hazard. ALWAYS wear gloves when changing bits. Accessible metal parts on the tool and bits may get extremely hot during operation. Small bits of broken material may damage bare hands.

DRILLING OPERATION

1.Use sharp drill bits only. For WOOD, begin with low speed and use twist drill bits, spade bits, power auger bits or hole saws. For METAL, begin with low speed and use steel twist drill bits or hole saws. Use a cutting lubricant when drilling metals. The exceptions are cast iron and brass which should be drilled dry. For MASONRY, use carbide-tipped bits or masonry bits. A smooth, even flow of dust indicates the proper drilling rate.

NOTE: Large [5/16" (8 mm) to 1/2" (13 mm)] holes in steel can be made easier if a pilot hole [5/32" (4 mm) to 3/16" (5 mm)] is drilled first.

2.Always apply pressure in a straight line with the bit. Use enough pressure to keep the drill bit biting, but do not push hard enough to stall the motor or deflect the bit.

3.Hold tool firmly with both hands to control the twisting action of the drill.

WARNING: Drill may stall if overloaded causing a sudden twist. Always expect the stall. Grip the drill firmly with both hands to control the twisting action and avoid injury.

4. IF DRILL STALLS, it is usually because it is being overloaded. RELEASE TRIGGER IMMEDIATELY, remove drill bit from work, and determine cause of stalling. DO NOT CLICK

TRIGGER OFF AND ON IN AN ATTEMPT TO START A STALLED DRILL – THIS CAN DAMAGE THE DRILL.

5.To minimize stalling or breaking through the material, reduce pressure on drill and ease the bit through the last fractional part of the hole.

6.Keep the motor running when pulling the bit back out of a drilled hole. This will help prevent jamming.

FIG. 1

	I
	D	C
		A
		B
	F
G	H	FIG. 2
	D	C
	D

7.With variable speed drills there is no need to center punch the point to be drilled. Use a slow speed to start the hole and accelerate by squeezing the trigger harder when the hole is deep enough to drill without the bit skipping out.

HAMMERDRILL OPERATION

1.When drilling, use just enough force on the hammer to keep it from bouncing excessively or “rising” off the bit. Too much force will cause slower drilling speeds, overheating, and a lower drilling rate.

2.Drill straight, keeping the bit at a right angle to the work. Do not exert side pressure on the bit when drilling as this will cause clogging of the bit flutes and a slower drilling speed.

3.When drilling deep holes, if the hammer speed starts to drop off, pull the bit partially out of the hole with the tool still running to help clear debris from the hole.

4.For masonry, use carbide-tipped bits or masonry bits. A smooth even flow of dust indicates the proper drilling rate.

MAINTENANCE

Cleaning

WARNING: Blow dirt and dust out of all air vents with clean, dry air at least once a week. To minimize the risk of eye injury, always wear ANSI Z87.1 approved eye protection when performing this.

WARNING: Never use solvents or other harsh chemicals for cleaning the non-metallic parts of the tool. These chemicals may weaken the plastic materials used in these parts. Use a cloth dampened only with water and mild soap. Never let any liquid get inside the tool; never immerse any part of the tool into a liquid.

Lubrication

Your tool was properly lubricated before leaving the factory. In from two to six months, depending upon use, take or send your tool to an authorized service center for a complete cleaning, inspection and lubrication. Tools used constantly on production jobs will need relubrication more often. Also, tools “out of service” for long periods should be relubricated before being put back to work.

Accessories

WARNING: Since accessories, other than those offered by DEWALT, have not been tested with this product, use of such accessories with this tool could be hazardous. To reduce the risk of injury, only DEWALT recommended accessories should be used with this product.

Recommended accessories for use with your tool are available at extra cost from your local dealer or authorized service center. If you need assistance in locating any accessory, please contact DEWALT Industrial Tool Co., 701 East Joppa Road, Baltimore, MD 21286, call 1-800-4-DEWALT (1-800-433- 9258) or visit our website: www.dewalt.com.

MAXIMUM RECOMMENDED CAPACITIES

DW511

CHUCK CAPACITY	1/2" (13 mm)
R.P.M.	0–2700
BITS, METAL DRILLING	1/2" (13 mm)
WOOD, FLAT BORING	1-1/2" (40 mm)
BITS, MASONRY DRILLING
optimum	1/8" –3/8" (3.2–10 mm)
maximum	5/8" (16 mm)

Repairs

To assure product SAFETY and RELIABILITY, repairs, maintenance and adjustment (including brush inspection and replacement) should be performed by a DEWALT factory service center, a DEWALT authorized service center or other qualified service personnel. Always use identical replacement parts.

Register Online

Thank you for your purchase. Register your product now for:

•WARRANTY SERVICE: Registering your product will help you obtain more efficient warranty service in case there is a problem with your product.

•CONFIRMATION OF OWNERSHIP: In case of an insurance loss, such as fire, flood or theft, your registration of ownership will serve as your proof of purchase.

•FOR YOUR SAFETY: Registering your product will allow us to contact you in the unlikely event a safety notification is required under the Federal Consumer Safety Act.

Three Year Limited Warranty

DEWALT will repair, without charge, any defects due to faulty materials or workmanship for three years from the date of purchase. This warranty does not cover part failure due to normal wear or tool abuse. For further detail of warranty coverage and warranty repair information, visit www.dewalt. com or call 1-800-4-DEWALT (1-800-433-9258). This warranty does not apply to accessories or damage caused where repairs have been made or attempted by others. This warranty gives you specific legal rights and you may have other rights which vary in certain states or provinces.

In addition to the warranty, DEWALT tools are covered by our:

1 YEAR FREE SERVICE

DEWALT will maintain the tool and replace worn parts caused by normal use, for free, any time during the first year after purchase.

90 DAY MONEY BACK GUARANTEE

If you are not completely satisfied with the performance of your DEWALT Power Tool, Laser, or Nailer for any reason, you can return it within 90 days from the date of purchase with a receipt for a full refund – no questions asked.