OPERATOR'S MANUAL
HAMMER DRILL - 1/2 in. (13 mm)
D550H
VARIABLE SPEED – DOUBLE INSULATED
RYOBI TECHNOLOGIES INC.
1428 Pearman Dairy Road
Anderson, SC 29625
Post Office Box 1207
Anderson, SC 29622
www.ryobitools.com
Phone 1-800-525-2579
983000-129
9-02
• SERVICE
Now that you have purchased your tool, should a need ever exist for repair parts or
service, simply contact your nearest Ryobi Authorized Service Center. Tool service
must be performed only by qualified repair personnel. Be sure to provide all pertinent
facts when you call or visit. Please call 1-800-525-2579 for your nearest Ryobi
Authorized Service Center. You can also check our Web site at www.ryobitools.com
for a complete list of Authorized Service Centers.
• MODEL NO. AND SERIAL NO.
The model number of this tool will be found on a plate attached to the motor housing.
Please record the model number and serial number in the space provided below.
• HOW TO ORDER REPAIR PARTS
WHEN ORDERING REPAIR PARTS,
ALWAYS GIVE THE FOLLOWING INFORMATION:
•
MODEL NUMBER
•
SERIAL NUMBER
D550H
EXTENSION CORD CAUTION
When using a power tool at a considerable distance from a
power source, be sure to use an extension cord that has the
capacity to handle the current the tool will draw. An under-
sized cord will cause a drop in line voltage, resulting in over-
heating and loss of power. Use the chart to determine the mini-
mum wire size required in an extension cord. Only round jack-
eted cords should be used.
When working with a tool outdoors, use an extension cord
that is designed for outside use. This is indicated by the letters
"WA" on the cord's jacket.
Before using any extension cord, inspect it for loose or ex-
posed wires and cut or worn insulation.
**Ampere rating
(on tool faceplate)
0-2.0
2.1-3.4
3.5-5.0
5.1-7.0
7.1-12.0 12.1-16.0
Cord Length
Wire Size (A.W.G.)
25'
16
16
16
16
14
14
50'
16
16
16
14
14
12
100'
16
16
14
12
10
—
CAUTION:
Keep the extension cord clear of the working
area. Position the cord so that it will not get caught on
lumber, tools or other obstructions while you are working
with a power tool.
**Used on 12 gauge - 20 amp circuit.
Summary of Contents for D550H
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