ELECTRIC DRYWALL
SCREWDRIVER
Model 9624
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© 2003 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.
Manual Revised 10d
ranges and refrigerators. There is an
increased risk of electric shock if your
body is grounded.
up or carrying the tool. Carrying
power tools with your finger on the
switch or energizing power tools that
have the switch on invites accidents.
c. Do not expose power tools to rain
or wet conditions. Water entering
a power tool will increase the risk of
electric shock.
d. Remove any adjusting key or wrench
before turning the power tool on.
A wrench or a key left attached to a
rotating part of the power tool may result
in personal injury.
d. Do not abuse the cord. never use
the cord for carrying, pulling or
unplugging the power tool. Keep
cord away from heat, oil, sharp
edges or moving parts. Damaged
or entangled cords increase the risk of
electric shock.
e. Do not overreach. Keep proper
footing and balance at all times. This
enables better control of the power tool
in unexpected situations.
f. Dress properly. Do not wear loose
clothing or jewelry. Keep your hair,
clothing and gloves away from
moving parts. Loose clothes, jewelry
or long hair can be caught in moving
parts.
e. When operating a power tool
outdoors, use an extension cord
suitable for outdoor use. Use of a
cord suitable for outdoor use reduces
the risk of electric shock.
f. If operating a power tool in a damp
location is unavoidable, use a
g. If devices are provided for the
connection of dust extraction and
collection facilities, ensure these are
connected and properly used. Use of
these devices can reduce dust-related
hazards.
ground Fault Circuit Interrupter
(gFCI) protected supply. Use of a
GFCI reduces the risk of electric shock.
3. personal safety
h. Only use safety equipment that has
been approved by an appropriate
standards agency. Unapproved
a. Stay alert, watch what you are
doing and use common sense when
operating a power tool. Do not use
a power tool while you are tired or
under the influence of drugs, alcohol
or medication. A moment of inattention
while operating power tools may result
in serious personal injury.
safety equipment may not provide
adequate protection. Eye protection
must be ANSI-approved and breathing
protection must be NIOSH-approved for
the specific hazards in the work area.
4. power tool use and care
b. use personal protective equipment.
Always wear eye protection. Safety
equipment such as dust mask, non-
skid safety shoes, hard hat, or hearing
protection used for appropriate
a. Do not force the power tool. use
the correct power tool for your
application. The correct power tool will
do the job better and safer at the rate
for which it was designed.
conditions will reduce personal injuries.
c. prevent unintentional starting.
Ensure the switch is in the off-
b. Do not use the power tool if the
switch does not turn it on and off.
Any power tool that cannot be controlled
position before connecting to power
source and/or battery pack, picking
SKU 9624
For technical questions, please call 1-800-444-3353.
Page 3
with the switch is dangerous and must
be repaired.
Screwdriver and Impact Wrench
Safety Warnings
c. Disconnect the plug from the power
source and/or the battery pack from
the power tool before making any
adjustments, changing accessories,
or storing power tools. Such
preventive safety measures reduce
the risk of starting the power tool
accidentally.
1. hold power tools by insulated
gripping surfaces when performing
an operation where the cutting tool
may contact hidden wiring or its own
cord. Contact with a ″live″ wire will make
exposed metal parts of the tool ″live″ and
shock the operator.
d. Store idle power tools out of the
reach of children and do not allow
persons unfamiliar with the power
tool or these instructions to operate
the power tool. Power tools are
dangerous in the hands of untrained
users.
2. Maintain labels and nameplates on
the tool. These carry important safety
information. If unreadable or missing,
contact Harbor Freight Tools for a
replacement.
3. Avoid unintentional starting. Prepare to
begin work before turning on the tool.
e. Maintain power tools. Check for
misalignment or binding of moving
parts, breakage of parts and any
other condition that may affect the
power tool’s operation. If damaged,
have the power tool repaired before
use. Many accidents are caused by
poorly maintained power tools.
4. Do not lay the tool down until it has come
to a complete stop. Moving parts can
grab the surface and pull the tool out of
your control.
5. When using a handheld power tool,
maintain a firm grip on the tool with both
hands to resist starting torque.
f. Keep cutting tools sharp and clean.
Properly maintained cutting tools with
sharp cutting edges are less likely to
bind and are easier to control.
6. Do not leave the tool unattended when
it is plugged into an electrical outlet.
Turn off the tool, and unplug it from its
electrical outlet before leaving.
g. use the power tool, accessories
and tool bits etc. in accordance
with these instructions, taking into
account the working conditions and
the work to be performed. Use of
the power tool for operations different
from those intended could result in a
hazardous situation.
7. This product is not a toy. Keep it out of
reach of children.
8. People with pacemakers should
consult their physician(s) before use.
Electromagnetic fields in close proximity
to heart pacemaker could cause
pacemaker interference or pacemaker
failure. In addition, people with
pacemakers should:
5. Service
a. have your power tool serviced by a
qualified repair person using only
identical replacement parts. This will
ensure that the safety of the power tool
is maintained.
• Avoid operating alone.
• Do not use with Trigger locked on.
• Properly maintain and inspect to avoid
electrical shock.
• Any power cord must be properly
Page 4
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SKU 9624
grounded. Ground Fault Circuit
Interrupter (GFCI) should also be
implemented – it prevents sustained
electrical shock.
Vibration Safety
This tool vibrates during use. Repeated
or long-term exposure to vibration may
cause temporary or permanent physical
injury, particularly to the hands, arms
and shoulders. To reduce the risk of
vibration-related injury:
9. WARNING: Some dust created by power
sanding, sawing, grinding, drilling, and
other construction activities, contains
chemicals known [to the State of
1. Anyone using vibrating tools regularly
or for an extended period should first
be examined by a doctor and then have
regular medical check-ups to ensure
medical problems are not being caused
or worsened from use. Pregnant
women or people who have impaired
blood circulation to the hand, past hand
injuries, nervous system disorders,
diabetes, or Raynaud’s Disease
California] to cause cancer, birth defects
or other reproductive harm. Some
examples of these chemicals are:
• Lead from lead-based paints
• 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.)
should not use this tool. If you feel any
symptoms related to vibration (such as
tingling, numbness, and white or blue
fingers), seek medical advice as soon as
possible.
2. Do not smoke during use. Nicotine
reduces the blood supply to the hands
and fingers, increasing the risk of
vibration-related injury.
10. WARNING: Handling the cord on this
product will expose you to lead, a
chemical known to the State of California
to cause cancer, and birth defects or
other reproductive harm. Wash hands
after handling. (California Health &
Safety Code § 25249.5, et seq.)
3. Wear suitable gloves to reduce the
vibration effects on the user.
4. Use tools with the lowest vibration when
there is a choice.
11. The warnings, precautions, and
instructions discussed in this instruction
manual cannot cover all possible
conditions and 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.
5. Include vibration-free periods each day
of work.
6. Grip tool as lightly as possible (while still
keeping safe control of it). Let the tool
do the work.
7. To reduce vibration, maintain the tool
as explained in this manual. If any
abnormal vibration occurs, stop use
immediately.
SKU 9624
For technical questions, please call 1-800-444-3353.
Page 5
away from the user, reducing the risk of
electric shock. (See 3-prong plug and
Outlet.)
SAVE ThESE
InSTRuCTIOnS.
2. The grounding prong in the plug is
connected through the green wire inside
the cord to the grounding system in the
tool. The green wire in the cord must
be the only wire connected to the tool’s
grounding system and must never be
attached to an electrically “live” terminal.
(See 3-prong plug and Outlet.)
gROunDIng
TO pREVEnT
ELECTRIC ShOCK
AnD DEATh FROM InCORRECT
gROunDIng WIRE
COnnECTIOn:
Check with a qualified electrician
if you are in doubt as to whether
the outlet is properly grounded.
Do not modify the power cord
plug provided with the tool.
never remove the grounding
prong from the plug. Do not use
the tool if the power cord or plug
is damaged. If damaged, have it
repaired by a service facility
before use. If the plug will not fit
the outlet, have a proper outlet
installed by a qualified
3. The tool must be plugged into an
appropriate outlet, properly installed and
grounded in accordance with all codes
and ordinances. The plug and outlet
should look like those in the preceding
illustration. (See 3-prong plug and
Outlet.)
Double Insulated Tools: Tools with
Two prong plugs
electrician.
grounded Tools: Tools with Three
prong plugs
Outlets for 2-prong plug
1. Tools marked “Double Insulated” do not
require grounding. They have a special
double insulation system which satisfies
OSHA requirements and complies with
the applicable standards of Underwriters
Laboratories, Inc., the Canadian
3-prong plug and Outlet
1. Tools marked with “Grounding Required”
have a three wire cord and three prong
grounding plug. The plug must be
Standard Association, and the National
Electrical Code.
2. Double insulated tools may be used in
either of the 120 volt outlets shown in the
preceding illustration. (See Outlets for
2-prong plug.)
connected to a properly grounded outlet.
If the tool should electrically malfunction
or break down, grounding provides a
low resistance path to carry electricity
Page 6
For technical questions, please call 1-800-444-3353.
SKU 9624
Extension Cords
RECOMMEnDED MInIMuM WIRE gAugE
FOR EXTEnSIOn CORDS* (120/240 VOLT)
1. Grounded tools require a three wire
extension cord. Double Insulated
tools can use either a two or three wire
extension cord.
EXTEnSIOn CORD
nAMEpLATE
LEngTh
AMpERES
(at full load)
25’ 50’ 75’ 100’ 150’
0 – 2.0
2.1 – 3.4
18
18
18
18
18
14
12
18
18
18
16
14
12
10
18
18
16
14
12
10
-
18
16
14
12
10
-
16
14
12
12
-
2. As the distance from the supply outlet
increases, you must use a heavier gauge
extension cord. Using extension cords
with inadequately sized wire causes a
serious drop in voltage, resulting in loss
of power and possible tool damage.
(See Table A.)
3.5 – 5.0
5.1 – 7.0
7.1 – 12.0
12.1 – 16.0
16.1 – 20.0
-
-
-
* Based on limiting the line volt-
age drop to five volts at 150% of
the rated amperes.
TABLE A
3. The smaller the gauge number of the
wire, the greater the capacity of the cord.
For example, a 14 gauge cord can carry
a higher current than a 16 gauge cord.
(See Table A.)
Symbology
Double Insulated
4. When using more than one extension
cord to make up the total length, make
sure each cord contains at least the
minimum wire size required.
Canadian Standards Association
Underwriters Laboratories, Inc.
Volts Alternating Current
Amperes
(See Table A.)
5. If you are using one extension cord for
more than one tool, add the nameplate
amperes and use the sum to determine
the required minimum cord size.
(See Table A.)
V~
A
No Load Revolutions per Minute
(RPM)
n xxxx/min.
0
6. If you are using an extension cord
outdoors, make sure it is marked with the
suffix “W-A” (“W” in Canada) to indicate it
is acceptable for outdoor use.
7. Make sure the extension cord is properly
wired and in good electrical condition.
Always replace a damaged extension
cord or have it repaired by a qualified
electrician before using it.
8. Protect the extension cords from sharp
objects, excessive heat, and damp or
wet areas.
SKU 9624
For technical questions, please call 1-800-444-3353.
Page 7
SpECIFICATIOnS
ASSEMBLY InSTRuCTIOnS
nOTE: For additional information regarding
the parts listed in the following pages,
refer to the Assembly Diagram near the
end of this manual.
Electrical Input 120 V~ / 60 Hz / 4.2 A (Rated)
Motor Speed
Drive
2250 RPM (No Load) VSR
1/4” Hex
Additional
Features
All Ball Bearing Construction
Trigger Lock Switch
Metal Gear Housing
Removable & Adjustable
Depth Collar
TO pREVEnT
SERIOuS InJuRY
FROM ACCIDEnTAL
OpERATIOn:
1/4” Magnetic Bit Holder
unplug the power Cord (43) from
its electrical outlet before adding
any accessories or making any
adjustments to the tool.
Accessories
Phillips Bit (Qty. 4)
Slotted Insert Bit (Qty. 2)
E194601
To Change Bit Tip holders:
unpACKIng
1. Pull forward on the Depth Collar (2) and
remove it from the Clutch Housing (5).
(See Figure A.)
When unpacking, make sure that the
item is intact and undamaged. If any parts
are missing or broken, please call Harbor
Freight Tools at 1-800-444-3353 as soon as
possible.
2. Pull the Bit Tip Holder (4) straight out
with pliers if it is difficult to remove.
(See Figure A.)
3. Push the new Bit Tip Holder (4) into the
Spindle (7) until the shank of the Bit Tip
Holder snaps in place. (See Figure A.)
4. Replace the Depth Collar (2) onto the
Clutch Housing (5). Make sure to align
the ribs on the inside of the Depth Collar
with the grooves on the outside of the
Clutch Housing before snapping the
Depth Collar in place. (See Figure A.)
BIT (3)
BIT TIp hOLDER (4)
DEpTh COLLAR (2)
SpInDLE
(7)
CLuTCh
hOuSIng
(5)
FIguRE A
Page 8
For technical questions, please call 1-800-444-3353.
SKU 9624
make sure the Trigger Lock mechanism
is working properly. Always release
the Trigger Lock mechanism before
disconnecting the Drywall Screwdriver
from its electrical outlet. Failure to do so
will cause the tool to start immediately
the next time it is plugged in, resulting
in possible injury or property damage.
(See Figure B.)
To Change The Bit:
1. Pull forward on the Depth Collar (2) and
remove it from the Clutch Housing (5).
(See Figure A.)
2. Pull the Bit (3) straight out with pliers if it
is difficult to remove. (See Figure A.)
3. Push the new Bit (3) into the Bit Tip
Holder (4) until the shank of the Bit
snaps in place. (See Figure A.)
3. The Drywall Screwdriver also features a
Forward/Reverse Switch. The Forward/
Reverse Switch is used to reverse
the rotation of the Bit for backing out
screws. To reverse the rotation, turn
off the Drywall Screwdriver and push
the Forward/Reverse Switch to the right
(when viewed from the back of the tool).
To position the Forward/Reverse Switch
for forward operation, turn off the tool
and push the Forward/Reverse Switch to
the left. (See Figure B.)
4. Replace the Depth Collar (2) onto the
Clutch Housing (5). Align the ribs on
the inside of the Depth Collar with the
grooves on the outside of the Clutch
Housing before snapping the Depth
Collar in place. (See Figure A.)
OpERATIng InSTRuCTIOnS
1. To start the Drywall Screwdriver, depress
the Trigger (38). To stop the tool, release
the Trigger. The variable speed Trigger
permits speed control. The farther the
Trigger is depressed, the higher the
4. The Depth Collar (part #2) allows the
operator to increase or decrease the
fastening depth. To seat a screw deeper
in a workpiece, turn the Depth Collar to
the right. To seat a screw higher in a
workpiece, turn the Depth Collar to the
left. (See Figures A and B.)
speed of the Tool. (See Figure B.)
2. To lock the Trigger (38) in the “ON”
position for continuous operation,
depress the Trigger and push in on the
Trigger Lock (39). The tool will continue
to run. To turn off the tool, squeeze and
release the Trigger once. Prior to using
the Drywall Screwdriver (each time),
DEpTh
FORWARD/REVERSE
SWITCh
COLLAR
(2)
TRIggER
LOCK (39)
TRIggER
(38)
FIguRE B
SKU 9624
For technical questions, please call 1-800-444-3353.
Page 9
InSpECTIOn, MAInTEnAnCE,
AnD CLEAnIng
pLEASE READ ThE
FOLLOWIng CAREFuLLY
TO pREVEnT
SERIOuS InJuRY
FROM ACCIDEnTAL
OpERATIOn:
THE MANUFACTURER AND/OR
DISTRIBUTOR HAS PROVIDED THE
PARTS LIST AND ASSEMBLY DIAGRAM IN
THIS MANUAL AS A REFERENCE TOOL
unplug the power Cord (43) from ONLY. NEITHER THE MANUFACTURER
its electrical outlet before
performing any inspection,
maintenance, or cleaning
procedures.
OR 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 TECHNICIANS, AND NOT BY
THE BUYER. THE BUYER ASSUMES ALL
RISK AND LIABILITY ARISING 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.
1. BEFORE EACh uSE, inspect the
general condition of the Drywall
Screwdriver. Check for loose screws,
misalignment or binding of moving parts,
damaged electrical wiring, damaged
accessories, and any other condition
that may affect its safe operation. If
abnormal noise or vibration occurs, have
the problem corrected before further use.
Do not use damaged equipment.
2. AT LEAST OnCE WEEKLY: With the
Drywall Screwdriver running, blow dirt
and dust out of all air vents of the tool
with dry air. Also, the Depth Collar (2)
should be removed and drywall dust
blown out of the Clutch Housing (5).
Be sure to wear safety impact eye
goggles when performing these
procedures.
3. TO CLEAn ThE EXTERIOR pLASTIC
pARTS: Use only a clean cloth and
mild detergent to clean the body of
the Drywall Screwdriver. Do not use
solvents. Do not immerse any part of the
tool in liquid.
Page 10
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SKU 9624
pARTS LIST AnD DIAgRAM
part
1
2
3
4
5
6
7
8
Description
part
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
Description
part
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
Description
Locator
Spindle
Brush Holder
Depth Collar
Bit
Bit Tip Holder
Clutch Housing
Shaft Seal
Spindle
Steel Ball
Clutch
Retaining Ring
Guide
Spring
Bearing Retainer
Ball Bearing
Gear Case
Screw (4.2 x 40)
Needle Bearing
Thrust Washer
Gear Case
Thrust Washer
Pinion and Gear
Gasket
Gear Case Cover
Ball Bearing
Fan
Lead
Brush
Trigger
Trigger Lock
Cord Clamp
Screw (4.2 x 14)
Cord Protector
Power Cord/Plug
Handle Cover
Screw (4.2 x 18)
Terminal
Needle Bearing
Thrust Washer
Bearing
Screw (4.2 x 25)
Capacitor
9
10
11
12
13
14
15
16
17
Armature
Cup
Baffle
Screw & Washer
Stator
Motor Housing
Warning Label
Nameplate
9
10 12 11 10
9
8 7
6
5
4
3
2
1
16
15
18
19
20
21
47
23
24
25
26
27
28
14 13
48 48
49
47
22
17
50
34
32
29
30
44
31
45
38
40
39
28
35
46
37
36
41
33
42
51
43
REV 10d
SKU 9624
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Page 11
Record product’s Serial number here:
note: If product has no serial number, record month and year of purchase instead.
note: Some parts are listed and shown for illustration purposes only, and are not available
individually as replacement parts.
To take advantage of this warranty,
the product or part must be returned to us
LIMITED 90 DAY WARRAnTY
Harbor Freight Tools Co. makes every
effort to assure that its products meet
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.
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
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
MERCHANTABILITY AND FITNESS.
Page 12
For technical questions, please call 1-800-444-3353.
SKU 9624
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