Chicago Electric Drill 47991 User Manual

1/2” D-HANDLE VSR DRILL  
Model 47991  
SET UP AND OPERATING INSTRUCTIONS  
Read this material before using this product.  
Failure to do so can result in serious injury.  
SAVE THIS MANUAL.  
Copyright© 2002 by Harbor Freight Tools®. All rights reserved. No portion of this manual or any artwork  
contained herein may be reproduced in any shape or form without the express written consent of  
Harbor Freight Tools. Diagrams within this manual may not be drawn proportionally. Due to continuing  
improvements, actual product may differ slightly from the product described herein. Tools required for  
assembly and service may not be included.  
For technical questions or replacement parts, please call 1-800-444-3353.  
Revised Manual 07d, 09j, 11a  
 
11. Remove adjusting keys and  
wrenches. Check that keys and  
adjusting wrenches are removed  
from the tool or machine work surface  
before plugging it in.  
proximity to heart pacemaker could  
cause pacemaker interference or  
pacemaker failure. In addition, people  
with pacemakers should:  
Avoid operating alone.  
Don’t use with power switch locked  
on.  
Properly maintain and inspect to  
avoid electrical shock.  
12. Avoid unintentional starting. Do not  
carry any tool with your finger on the  
trigger, whether it is plugged in or not.  
Any power cord must be properly  
grounded. Ground Fault Circuit  
Interrupter (GFCI) should also be  
implemented – it prevents sustained  
electrical shock.  
13. Stay alert. Watch what you are doing,  
use common sense. Do not operate  
any tool when you are tired.  
14. Take caution as some woods  
contain preservatives such as  
copper chromium arsenate (CCA)  
which can be toxic. When drilling  
these materials extra care should be  
taken to avoid inhalation and minimize  
skin contact.  
17. Check for damaged parts. Before  
using any tool, any part that appears  
damaged should be carefully checked  
to determine that it will operate  
properly and perform its intended  
function. Check for alignment and  
binding of moving parts; any broken  
parts or mounting fixtures; and any  
other condition that may affect proper  
operation. Any part that is damaged  
should be properly repaired or replaced  
by a qualified technician. Do not use  
the tool if the trigger does not turn On  
and Off properly.  
15. WARNING: Some dust created by  
power sanding, sawing, grinding,  
drilling, and other construction  
activities, contains chemicals  
known [to the State of California] to  
cause cancer, birth defects or other  
reproductive harm. Some examples  
of these chemicals are:  
Lead from lead-based paints  
18. Guard against electric shock.  
Prevent body contact with grounded  
surfaces such as pipes, radiators,  
ranges, and refrigerator enclosures.  
Crystalline silica from bricks and  
cement or other masonry products  
Arsenic and chromium from chemically  
treated lumber  
Your risk from these exposures  
varies, depending on how often you  
do this type of work. To reduce your  
exposure to these chemicals: work in  
a well ventilated area, and work with  
approved safety equipment, such as  
those dust masks that are specially  
designed to filter out microscopic  
particles. (California Health & Safety  
Code § 25249.5, et seq.)  
19. Replacement parts and accessories.  
When servicing, use only identical  
replacement parts. Use of any other  
parts will void the warranty. Only use  
accessories intended for use with  
this tool. Approved accessories are  
available from Harbor Freight Tools.  
20. Do not operate tool if under the  
influence of alcohol or drugs. Read  
warning labels on prescriptions to  
16. People with pacemakers should  
consult their physician(s) before  
use. Electromagnetic fields in close  
determine if your judgment or reflexes  
are impaired while taking drugs. If there  
is any doubt, do not operate the tool.  
SKU 47991  
For technical questions, please call 1-800-444-3353.  
Page 3  
 
21. Use proper size and type extension  
cord. If an extension cord is required,  
it must be of the proper size and type  
to supply the correct current to the  
tool without heating up. Otherwise,  
the extension cord could melt and  
catch fire, or cause electrical damage  
to the tool. This tool requires use of  
an extension cord of 0 to 10 amps  
capability (up to 50 feet), with wire size  
rated at 18 AWG. Longer extension  
cords require larger size wire. If you  
are using the tool outdoors, use an  
extension cord rated for outdoor use  
(signified by “WA” on the jacket).  
UNPACKING  
When unpacking, check to make sure  
the parts listed on page 6 are included. If  
any parts are missing or broken, please call  
Harbor Freight Tools at the number on the  
cover of this manual as soon as possible.  
OPERATION  
Refer to FIGURE 1 below.  
Warning! Always unplug the unit when  
changing bits.  
Warning! After drilling or driving screws,  
the bit will be extremely hot. Do not  
touch it until it has had ample time to  
cool down.  
22. Maintenance. For your safety,  
maintenance should be performed  
regularly by a qualified technician.  
23. The warnings, cautions, and  
instructions discussed in this  
instruction manual cannot cover  
all possible conditions and  
1. Insert the Chuck Key (41) into one of  
the holes in the Chuck (3) and turn it  
counterclockwise to open the jaws.  
situations that may occur. It must  
be understood by the operator that  
common sense and caution are  
factors which cannot be built into  
this product, but must be supplied  
by the operator.  
2. Insert the bit and hand tighten it, then  
tighten it with the Chuck Key (41) by  
turning it clockwise.  
Carbon Brush  
(also found on bottom of tool)  
Torque  
Switch  
Figure 1  
Trigger  
Chuck  
Lock Button  
Side Handle  
Power Cord  
SKU 47991  
For technical questions, please call 1-800-444-3353.  
Page 4  
 
3. With heavy leather gloves on, tug on  
the bit and make sure it is securely  
attached. Check that it is straight.  
use lubricants with brass, copper, and  
cast iron. Grasp the handles firmly with  
both hands and slowly squeeze the  
Trigger (34). Never operate the tool  
without the side handle. Never force  
the tool. Only apply light pressure  
when horizontal drilling.  
Note: Always use sharp bits. Dull or  
damaged bits may cause undue stress  
on the drill and possibly break causing  
injury. Bits are available at Harbor  
Freight Tools.  
8. When driving screws, use bits suitable  
for the type and size of screw you are  
using. Drill a pilot hole for the screw  
head to bite into. Use the lowest  
torque setting. Grasp the handles  
firmly with both hands and slowly  
squeeze the Trigger (34). Never force  
the tool. To back out a screw, stop and  
change the Directional Switch to the  
back position.  
4. Securely clamp your workpiece.  
5. Locate the Side Handle on the desired  
side of the tool.  
Drilling  
6. When drilling wood, place the bit  
at the point to be drilled. If you are  
drilling a hard, smooth surface, use a  
punch to mark the drill location. Set  
the Directional Switch forward. Grasp  
the handles firmly with both hands  
and slowly squeeze the Trigger (34).  
Never operate the tool without the side  
handle. Never force the tool. Only  
apply light pressure when horizontal  
drilling. If you need more or less  
torque, use the torque adjustment on  
the top of the drill.  
MAINTENANCE  
1. Unplug the drill while performing  
maintenance.  
2. Periodically check the mounting screws  
and tighten if necessary.  
3. Clean the unit with a damp cloth.  
Never use solvents to clean the unit.  
4. Inspect the chuck and remove any dirt  
or debris.  
Note: When drilling plastics or plastic  
coated chip board, follow the same  
directions as stated in number 5 for  
wood.  
5. Inspect the Carbon Brushes (29). See  
Figure 1 on page 4.  
Remove the Carbon Brush Cap  
(30) on top of the drill.  
Note: If a bit becomes wedged into the  
workpiece, stop and change the  
Directional Switch to the reverse  
position. Then slowly squeeze the  
Trigger to back the bit out of the work  
piece.  
Take the Carbon Brush (29) out of  
the Brush Holder (28). If it is dirty,  
use a pencil eraser to clean it. If it  
is worn, replace it and replace the  
Carbon Brush Cap (30). If you  
replace one Carbon Brush, you  
must replace them both. Repeat  
the process with the Carbon Brush  
Cap (30) on the bottom of the drill.  
7. When drilling metal, always use a  
punch to mark the drilling position.  
Use a lubricant to prolong the life of  
the bit and increase the drilling action  
with most metals. With steel, tin, and  
sheet metal use a light machine oil,  
with aluminum, use paraffin. Do not  
REV 07d  
SKU 47991  
For technical questions, please call 1-800-444-3353.  
Page 5  
 
PARTS LIST  
Part  
1
Description  
Q’ty  
1
Part  
22  
23  
24  
25  
26  
27  
28  
29  
30  
31  
32  
33  
34  
35  
36  
37  
38  
39  
40  
41  
Description  
Windshield  
Q’ty  
1
Screw  
Washer  
Chuck  
2
1
Bolt  
2
3
1
Stator  
1
4
Fender Ring  
Felt Cover  
Felt  
1
Bearing  
1
5
1
Bearing Sleeve  
Motor Housing  
Brush Holder  
Carbon Brush  
Carbon Brush Cap  
Right Handle  
Screw  
1
6
1
1
7
1/2 Circle Key  
Spindle  
1
2
8
1
2
9
Screw  
4
2
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
Bearing  
1
1
Head Shell  
Gear  
1
6
1
Governor  
1
Needle Bearing  
Needle Bearing  
1/2 Circle Key  
Middle Gear  
Gear  
1
Trigger  
1
1
Cable Clamp  
Screw  
1
1
2
1
Cable Sheath  
Power Cord  
Left Handle  
Screw  
1
1
1
Needle Bearing  
Middle Cover  
Bearing  
1
1
1
8
1
Chuck Key  
1
Armature  
1
Note: Chuck Key (41) not shown in Assembly Drawing.  
PLEASE READ THE FOLLOWING CAREFULLY  
THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDED THE PARTS DIAGRAM IN THIS MANUAL  
AS A REFERENCE TOOL ONLY. NEITHER THE MANUFACTURER NOR DISTRIBUTOR MAKES ANY  
REPRESENTATION OR WARRANTY OF ANY KIND TO THE BUYER THAT HE OR SHE IS QUALIFIED TO  
MAKE ANY REPAIRS TO THE PRODUCT OR THAT HE OR SHE IS QUALIFIED TO REPLACE ANY PARTS  
OF THE PRODUCT. IN FACT, THE MANUFACTURER AND/OR DISTRIBUTOR EXPRESSLY STATES THAT  
ALL REPAIRS AND PARTS REPLACEMENTS SHOULD BE UNDERTAKEN BY CERTIFIED AND LICENSED  
TECHNICIANSAND NOT BYTHE BUYER. THE BUYERASSUMESALLRISKAND LIABILITYARISING OUT OF  
HIS OR HER REPAIRS TO THE ORIGINAL PRODUCT OR REPLACEMENT PARTS THERETO, OR ARISING  
OUT OF HIS OR HER INSTALLATION OF REPLACEMENT PARTS THERETO.  
Note: Some parts are listed and shown for illustration purposes only and are not available  
individually as replacement parts.  
SKU 47991  
For technical questions, please call 1-800-444-3353.  
Page 6  
 
ASSEMBLY DRAWING  
1
2
3
4
5
6
7
8
9
10  
11  
12  
13  
4
34  
36  
37  
35  
SKU 47991  
For technical questions, please call 1-800-444-3353.  
Page 7  
 
LIMITED 90 DAY WARRANTY  
Harbor Freight Tools Co. makes every effort to assure that its products meet high  
quality and durability standards, and warrants to the original purchaser that this product  
is free from defects in materials and workmanship for the period of 90 days from the date  
of purchase. This warranty does not apply to damage due directly or indirectly, to misuse,  
abuse, negligence or accidents, repairs or alterations outside our facilities, criminal activity,  
improper installation, normal wear and tear, or to lack of maintenance. We shall in no event  
be liable for death, injuries to persons or property, or for incidental, contingent, special  
or consequential damages arising from the use of our product. Some states do not allow  
the exclusion or limitation of incidental or consequential damages, so the above limitation  
of exclusion may not apply to you. THIS WARRANTY IS EXPRESSLY IN LIEU OF ALL  
OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF  
MERCHANTABILITY AND FITNESS.  
To take advantage of this warranty, the product or part must be returned to us with  
transportation charges prepaid. Proof of purchase date and an explanation of the complaint  
must accompany the merchandise. If our inspection verifies the defect, we will either repair  
or replace the product at our election or we may elect to refund the purchase price if we  
cannot readily and quickly provide you with a replacement. We will return repaired products  
at our expense, but if we determine there is no defect, or that the defect resulted from  
causes not within the scope of our warranty, then you must bear the cost of returning the  
product.  
This warranty gives you specific legal rights and you may also have other rights which  
vary from state to state.  
3491 Mission Oaks Blvd. • PO Box 6009 • Camarillo, CA 93011 • (800) 444-3353  
SKU 47991  
For technical questions, please call 1-800-444-3353.  
Page 8  
 

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