Page 1
ELECTRIC DRYWALL
SCREWDRIVER
Model
9624
SET up AnD OpERATIng InSTRuCTIOnS
Visit our website at: http://www.harborfreight.com
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
Page 2
SAVE ThIS MAnuAL
Keep this manual for the safety warnings
and precautions, assembly, operating,
inspection, maintenance and cleaning
procedures. Write the product’s serial number
in the back of the manual near the assembly
diagram (or month and year of purchase if
product has no number). Keep this manual
and the receipt in a safe and dry place for
future reference.
IMpORTAnT SAFETY
InFORMATIOn
In this manual, on the labeling, and
all other information provided with
this product:
This is the safety alert
symbol. It is used to alert
you to potential personal
injury hazards. Obey all
safety messages that follow
this symbol to avoid possible
injury or death.
DAngER indicates a
hazardous situation
which, if not avoided, will result
in death or serious injury.
WARnIng indicates a
hazardous situation
which, if not avoided, could
result in death or serious injury.
CAuTIOn, used with
the safety alert
symbol, indicates a hazardous
situation which, if not avoided,
could result in minor or moderate
injury.
nOTICE is used to
address practices not
related to personal injury.
CAuTIOn, without the
safety alert symbol, is
used to address practices not
related to personal injury.
general power Tool Safety Warnings
WARnIng Read all safety warnings
and instructions. Failure to follow the
warnings and instructions may result
in electric shock, re and/or serious
injury.
Save all warnings and instructions
for future reference.
The term ″power tool″ in the warnings
refers to your mains-operated (corded)
power tool or battery-operated
(cordless) power tool.
Work area safety1.
Keep work area clean and well lit. a.
Cluttered or dark areas invite accidents.
Do not operate power tools in b.
explosive atmospheres, such as in
the presence of ammable liquids,
gases or dust. Power tools create
sparks which may ignite the dust or
fumes.
Keep children and bystanders c.
away while operating a power tool.
Distractions can cause you to lose
control.
Electrical safety2.
power tool plugs must match the a.
outlet. never modify the plug in
any way. Do not use any adapter
plugs with grounded power tools.
Unmodied plugs and matching outlets
will reduce risk of electric shock.
Avoid body contact with grounded b.
surfaces such as pipes, radiators,
Page 2 For technical questions, please call 1-800-444-3353. SKU 9624
Page 3
ranges and refrigerators. There is an
increased risk of electric shock if your
body is grounded.
Do not expose power tools to rain c.
or wet conditions. Water entering
a power tool will increase the risk of
electric shock.
Do not abuse the cord. never use d.
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.
When operating a power tool e.
outdoors, use an extension cord
suitable for outdoor use. Use of a
cord suitable for outdoor use reduces
the risk of electric shock.
up or carrying the tool. Carrying
power tools with your nger on the
switch or energizing power tools that
have the switch on invites accidents.
Remove any adjusting key or wrench d.
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.
Do not overreach. Keep proper e.
footing and balance at all times. This
enables better control of the power tool
in unexpected situations.
Dress properly. Do not wear loose f.
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.
If operating a power tool in a damp f.
location is unavoidable, use a
ground Fault Circuit Interrupter
(gFCI) protected supply. Use of a
GFCI reduces the risk of electric shock.
personal safety3.
Stay alert, watch what you are a.
doing and use common sense when
operating a power tool. Do not use
a power tool while you are tired or
under the inuence of drugs, alcohol
or medication. A moment of inattention
while operating power tools may result
in serious personal injury.
use personal protective equipment. b.
Always wear eye protection. Safety
equipment such as dust mask, non-
skid safety shoes, hard hat, or hearing
protection used for appropriate
conditions will reduce personal injuries.
If devices are provided for the g.
connection of dust extraction and
collection facilities, ensure these are
connected and properly used. Use of
these devices can reduce dust-related
hazards.
Only use safety equipment that has h.
been approved by an appropriate
standards agency. Unapproved
safety equipment may not provide
adequate protection. Eye protection
must be ANSI-approved and breathing
protection must be NIOSH-approved for
the specic hazards in the work area.
power tool use and care4.
Do not force the power tool. use a.
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.
prevent unintentional starting. c.
Ensure the switch is in the offposition before connecting to power
source and/or battery pack, picking
Do not use the power tool if the b.
switch does not turn it on and off.
Any power tool that cannot be controlled
Page 3For technical questions, please call 1-800-444-3353.SKU 9624
Page 4
with the switch is dangerous and must
be repaired.
Disconnect the plug from the power c.
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.
Screwdriver and Impact Wrench
Safety Warnings
hold power tools by insulated 1.
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.
Store idle power tools out of the d.
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.
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.
Keep cutting tools sharp and clean.f.
Properly maintained cutting tools with
sharp cutting edges are less likely to
bind and are easier to control.
use the power tool, accessories g.
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.
Service5.
have your power tool serviced by a a.
qualied repair person using only
identical replacement parts. This will
ensure that the safety of the power tool
is maintained.
Maintain labels and nameplates on 2.
the tool. These carry important safety
information. If unreadable or missing,
contact Harbor Freight Tools for a
replacement.
Avoid unintentional starting. Prepare to 3.
begin work before turning on the tool.
Do not lay the tool down until it has come 4.
to a complete stop. Moving parts can
grab the surface and pull the tool out of
your control.
When using a handheld power tool, 5.
maintain a rm grip on the tool with both
hands to resist starting torque.
Do not leave the tool unattended when 6.
it is plugged into an electrical outlet.
Turn off the tool, and unplug it from its
electrical outlet before leaving.
This product is not a toy. Keep it out of 7.
reach of children.
People with pacemakers should 8.
consult their physician(s) before use.
Electromagnetic elds in close proximity
to heart pacemaker could cause
pacemaker interference or pacemaker
failure. In addition, people with
pacemakers should:
• 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 For technical questions, please call 1-800-444-3353. SKU 9624
Page 5
grounded. Ground Fault Circuit
Interrupter (GFCI) should also be
implemented – it prevents sustained
electrical shock.
WARNING: Some dust created by power 9.
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
• 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 lter out
microscopic particles. (California Health
& Safety Code § 25249.5, et seq.)
WARNING: Handling the cord on this 10.
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.)
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:
Anyone using vibrating tools regularly 1.
or for an extended period should rst
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
should not use this tool. If you feel any
symptoms related to vibration (such as
tingling, numbness, and white or blue
ngers), seek medical advice as soon as
possible.
Do not smoke during use. Nicotine 2.
reduces the blood supply to the hands
and ngers, increasing the risk of
vibration-related injury.
Wear suitable gloves to reduce the 3.
vibration effects on the user.
Use tools with the lowest vibration when 4.
there is a choice.
The warnings, precautions, and 11.
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.
Include vibration-free periods each day 5.
of work.
Grip tool as lightly as possible (while still 6.
keeping safe control of it). Let the tool
do the work.
To reduce vibration, maintain the tool 7.
as explained in this manual. If any
abnormal vibration occurs, stop use
immediately.
Page 5For technical questions, please call 1-800-444-3353.SKU 9624
Page 6
SAVE ThESE
InSTRuCTIOnS.
gROunDIng
TO pREVEnT
ELECTRIC ShOCK
AnD DEATh FROM InCORRECT
gROunDIng WIRE
COnnECTIOn:
Check with a qualied 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 t
the outlet, have a proper outlet
installed by a qualied
electrician.
away from the user, reducing the risk of
electric shock. (See 3-prong plug and
Outlet.)
The grounding prong in the plug is 2.
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.)
The tool must be plugged into an 3.
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
grounded Tools: Tools with Three
prong plugs
3-prong plug and Outlet
Tools marked with “Grounding Required” 1.
have a three wire cord and three prong
grounding plug. The plug must be
connected to a properly grounded outlet.
If the tool should electrically malfunction
or break down, grounding provides a
low resistance path to carry electricity
Outlets for 2-prong plug
Tools marked “Double Insulated” do not 1.
require grounding. They have a special
double insulation system which satises
OSHA requirements and complies with
the applicable standards of Underwriters
Laboratories, Inc., the Canadian
Standard Association, and the National
Electrical Code.
Double insulated tools may be used in 2.
either of the 120 volt outlets shown in the
preceding illustration. (See Outlets for
2-prong plug.)
Page 6 For technical questions, please call 1-800-444-3353. SKU 9624
Page 7
Extension Cords
Grounded1. tools require a three wire
extension cord. Double Insulated
tools can use either a two or three wire
extension cord.
As the distance from the supply outlet 2.
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.)
The smaller the gauge number of the 3.
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.)
RECOMMEnDED MInIMuM WIRE gAugE
FOR EXTEnSIOn CORDS* (120/240 VOLT)
nAMEpLATE
AMpERES
(at full load)
0 – 2.0 18 18 18 18 16
2.1 – 3.4 18 18 18 16 14
3.5 – 5.0 18 18 16 14 12
5.1 – 7.0 18 16 14 12 12
7.1 – 12.0 18 14 12 10 -
12.1 – 16.0 14 12 10 - -
16.1 – 20.0 12 10 - - -
TABLE A
EXTEnSIOn CORD
LEngTh
25’ 50’ 75’ 100’ 150’
* Based on limiting the line volt-
age drop to ve volts at 150% of
the rated amperes.
Symbology
When using more than one extension 4.
cord to make up the total length, make
sure each cord contains at least the
minimum wire size required.
(See Table A.)
If you are using one extension cord for 5.
more than one tool, add the nameplate
amperes and use the sum to determine
the required minimum cord size.
(See Table A.)
If you are using an extension cord 6.
outdoors, make sure it is marked with the
sufx “W-A” (“W” in Canada) to indicate it
is acceptable for outdoor use.
Make sure the extension cord is properly 7.
wired and in good electrical condition.
Always replace a damaged extension
cord or have it repaired by a qualied
electrician before using it.
V~
A
n0 xxxx/min.
Double Insulated
Canadian Standards Association
Underwriters Laboratories, Inc.
Volts Alternating Current
Amperes
No Load Revolutions per Minute
(RPM)
Protect the extension cords from sharp 8.
objects, excessive heat, and damp or
wet areas.
Page 7For technical questions, please call 1-800-444-3353.SKU 9624
Page 8
SpECIFICATIOnS
ASSEMBLY InSTRuCTIOnS
Electrical Input 120 V~ / 60 Hz / 4.2 A (Rated)
Motor Speed 2250 RPM (No Load) VSR
Drive 1/4” Hex
Additional
Features
Accessories Phillips Bit (Qty. 4)
All Ball Bearing Construction
Trigger Lock Switch
Metal Gear Housing
Removable & Adjustable
Depth Collar
1/4” Magnetic Bit Holder
Slotted Insert Bit (Qty. 2)
E194601
unpACKIng
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.
nOTE: For additional information regarding
the parts listed in the following pages,
refer to the Assembly Diagram near the
end of this manual.
TO pREVEnT
SERIOuS InJuRY
FROM ACCIDEnTAL
OpERATIOn:
unplug the power Cord (43) from
its electrical outlet before adding
any accessories or making any
adjustments to the tool.
To Change Bit Tip holders:
Pull forward on the Depth Collar (2) and 1.
remove it from the Clutch Housing (5).
(See Figure A.)
Pull the Bit Tip Holder (4) straight out 2.
with pliers if it is difcult to remove.
(See Figure A.)
FIguRE A
BIT TIp hOLDER (4)
CLuTCh
hOuSIng
(5)
Push the new Bit Tip Holder (4) into the 3.
Spindle (7) until the shank of the Bit Tip
Holder snaps in place. (See Figure A.)
Replace the Depth Collar (2) onto the 4.
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)
DEpTh COLLAR (2)
SpInDLE
(7)
Page 8 For technical questions, please call 1-800-444-3353. SKU 9624
Page 9
To Change The Bit:
Pull forward on the Depth Collar (2) and 1.
remove it from the Clutch Housing (5).
(See Figure A.)
Pull the Bit (3) straight out with pliers if it 2.
is difcult to remove. (See Figure A.)
Push the new Bit (3) into the Bit Tip 3.
Holder (4) until the shank of the Bit
snaps in place. (See Figure A.)
Replace the Depth Collar (2) onto the 4.
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
To start the Drywall Screwdriver, depress 1.
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
speed of the Tool. (See Figure B.)
To lock the Trigger (38) in the “ON” 2.
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),
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.)
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.)
The Depth Collar (part #2) allows the 4.
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.)
FIguRE B
DEpTh
COLLAR
(2)
FORWARD/REVERSE
SWITCh
TRIggER
LOCK (39)
TRIggER
(38)
Page 9For technical questions, please call 1-800-444-3353.SKU 9624
Page 10
InSpECTIOn, MAInTEnAnCE,
pLEASE READ ThE
AnD CLEAnIng
TO pREVEnT
SERIOuS InJuRY
FROM ACCIDEnTAL
OpERATIOn:
unplug the power Cord (43) from
its electrical outlet before
performing any inspection,
maintenance, or cleaning
procedures.
BEFORE EACh uSE,1. 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.
AT LEAST OnCE WEEKLY: 2. 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.
FOLLOWIng CAREFuLLY
THE MANUFACTURER AND/OR
DISTRIBUTOR HAS PROVIDED THE
PARTS LIST AND ASSEMBLY DIAGRAM IN
THIS MANUAL AS A REFERENCE TOOL
ONLY. NEITHER THE MANUFACTURER
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.
TO CLEAn ThE EXTERIOR pLASTIC 3.
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 For technical questions, please call 1-800-444-3353. SKU 9624
Page 11
pARTS LIST AnD DIAgRAM
part Description
1 Locator
2 Depth Collar
3 Bit
4 Bit Tip Holder
5 Clutch Housing
6 Shaft Seal
7 Spindle
8 Steel Ball
9 Clutch
10 Retaining Ring
11 Guide
12 Spring
13 Bearing Retainer
14 Ball Bearing
15 Gear Case
16 Screw (4.2 x 40)
17 Needle Bearing
10
9
28
27
26
part Description
18 Spindle
19 Thrust Washer
20 Gear Case
21 Thrust Washer
22 Pinion and Gear
23 Gasket
24 Gear Case Cover
25 Ball Bearing
26 Fan
27 Armature
28 Cup
29 Bafe
30 Screw & Washer
31 Stator
32 Motor Housing
33 Warning Label
34 Nameplate
8
9101112
24
25
23
47
567
21
20
19
part Description
35 Brush Holder
36 Lead
37 Brush
38 Trigger
39 Trigger Lock
40 Cord Clamp
41 Screw (4.2 x 14)
42 Cord Protector
43 Power Cord/Plug
44 Handle Cover
45 Screw (4.2 x 18)
46 Terminal
47 Needle Bearing
48 Thrust Washer
49 Bearing
50 Screw (4.2 x 25)
51 Capacitor
1234
18
15
16
45
REV 10d
44
51
46
39
41
42
43
38
40
34
37
32
1314
48
501722474849
29
31
28
35
30
36
33
Page 11For technical questions, please call 1-800-444-3353.SKU 9624
Page 12
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.
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.
EXPRESSLY IN LIEU OF ALL OTHER
WARRANTIES, EXPRESS OR IMPLIED,
INCLUDING THE WARRANTIES OF
MERCHANTABILITY AND FITNESS.
THIS WARRANTY IS
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 veries 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 specic 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
Page 12 For technical questions, please call 1-800-444-3353. SKU 9624
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