DeWalt D21805 Original Instructions Manual page 21

• Check for damage to the tool, parts or accessories which may
have occurred during transport.
• Take the time to thoroughly read and understand this manual
prior to operation.
Markings on Tool
The following pictograms are shown on the tool:
Read instruction manual before use.
Wear ear protection.
Wear eye protection.
Date Code Position (Fig. A)
The date code 13 , which also includes the year of manufacture,
is printed into the housing.
Example:
2019 XX XX
Year of Manufacture
Description (Fig. A)

WARNING: Never modify the power tool or any part of it.
Damage or personal injury could result.
1 Variable speed switch
Lock-on button
2
Forward/reverse slider
3
4 Two gear selector
Mode selector
5
Side handle
6
Depth adjustment rod
7
Keyed chuck
8
Sleeve
9
Chuck key (included with some models)
10
Keyless chuck (D21805KS, D21810KS)
11
Main handle
12
Date code
13
Intended Use
Your percussion drill has been designed for professional drilling
and impact drilling as well as for screwdriving applications.
DO nOT use under wet conditions or in the presence of
flammable liquids or gases.
These heavy-duty drills are professional power tools.
DO nOT let children come into contact with the tool.
Supervision is required when inexperienced operators use
this tool.
• Young children and the infirm. This appliance is not
intended for use by young children or infirm persons
without supervision.
• This product is not intended for use by persons (including
children) suffering from diminished physical, sensory or
mental abilities; lack of experience, knowledge or skills
unless they are supervised by a person responsible for their
safety. Children should never be left alone with this product.
ASSEMBLY AND ADJUSTMENTS

WARNING: To reduce the risk of serious personal
injury, turn tool off and disconnect tool from power
source before making any adjustments or removing/
installing attachments or accessories. Be sure the
trigger switch is in the OFF position. An accidental start-up
can cause injury.
Selecting the Operating Mode (Fig. D)
The tool can be used in two operating modes:
Rotary drilling for steel, wood and plastics
Percussion drilling: simultaneous rotating
and impacting for concreete and masonry
drilling operations
Select the required operating mode by rotating the mode
selector to the required position.
5
Inserting and Removing a Bit from a Keyed
Chuck (Fig. A)
1. Open the chuck by turning the sleeve
insert the bit shank.
2. Put the chuck key 10 into each hole in the side of the chuck
and turn clockwise until tight.
3. To remove the bit, proceed in reverse order.
Inserting and Removing a Bit from a Keyless
Chuck (Fig. A)
1. Open the chuck by turning the sleeve
insert the bit shank.
2. Place the bit in the chuck as far as it will go and lift
slightly before tightening. Tighten firmly by turning the
sleeve clockwise.
3. To remove the bit, proceed in reverse order.
Fitting the Side Handle (Fig. A)
The side handle 6 can be fitted to suit both RH- and LH-users.

WARNING: Always use the drill with the side handle
properly assembled.
1. Loosen the side handle.
- For RH-users, slide the side handle clamp over the collar
behind the chuck, handle at the left.
- For LH-users, slide the side handle clamp over the colar
behind the chuck, handle at the right.
2. Rotate the side handle to the desired position and tighten
the handle.
Setting the Drilling Depth (Fig. C)
1. Insert the required drill bit into the chuck.
2. Slacken the side handle 6
EnGLIsH
9 anticlockwise and
9 anticlockwise and
.
19