Bauer Hypermax Lithium 1791C-B1, Hypermax Lithium 1792C-B1 Owner's Manual & Safety Instructions

Owner’s Manual & Safety Instructions

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� 18i

When unpacking, make sure that the product is intact

and undamaged� If any parts are missing or broken,

please call 1-888-866-5797 as soon as possible�

Copyright© 2018 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�

Too l s r e q ui r e d f o r a s s em b l y a n d s e rv i c e m a y n o t b e i n c lu d e d�

!"#"$%&'(%)*+#"$*%,$-%.$$/-00)))1.,(+&(2(*"3.$14&5

65,"7%&'(%$*4.8"4,7%#'//&($%,$-%/(&9'4$#'//&($:.,(+&(2(*"3.$14&5

Read this material before using this product�
Failure to do so can result in serious injury�
SAVE THIS MANUAL�

Safety ���������������������������������������������������������������������2
Specifications ���������������������������������������������������������7
Setup ����������������������������������������������������������������������7

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Operation ����������������������������������������������������������������8

G,+7*%&2%O&8$*8$#

Maintenance ����������������������������������������������������������11
Parts List and Diagram ������������������������������������������12
Warranty ����������������������������������������������������������������16

QFKMLMR%EHNSITE%FMU%U6;LMLGLIME

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�

Indicates a hazardous situation which, if not avoided,

will result in death or serious injury�

Indicates a hazardous situation which, if not avoided,

could result in death or serious injury�

Indicates a hazardous situation which, if not avoided,

could result in minor or moderate injury�

Addresses practices not related to personal injury�

LNJIKGFMG%EF;6GH%LM;IKNFGLIM

R*8*(,7%J&)*(%G&&7%E,2*$V%Q,(8"83#

K*,9%,77%#,2*$V%),(8"83#=%"8#$('4$"&8#=%"77'#$(,$"&8#%,89%#/*4"2"4,$"&8#%/(&W"9*9%)"$.%$."#%/&)*(%$&&71%

Failure to follow all instructions listed below may result in electric shock, fire and/or serious injury.

E,W*%,77%),(8"83#%,89%"8#$('4$"&8#%2&(%2'$'(*%(*2*(*84*1

The term “power tool” in the warnings refers to your mains-operated (corded)
power tool or battery-operated (cordless) power tool.

1� Q&(X%,(*,%#,2*$V

a� Y**/%)&(X%,(*,%47*,8%,89%)*77%7"$1%

Cluttered or dark areas invite accidents.

b� U&%8&$%&/*(,$*%/&)*(%$&&7#%"8%

*Z/7&#"W*%,$5&#/.*(*#=%#'4.%,#%"8%
$.*%/(*#*84*%&2%27,55,+7*%7"<'"9#=%
3,#*#%&(%9'#$1%Power tools create sparks

which may ignite the dust or fumes.

c� Y**/%4."79(*8%,89%+V#$,89*(#%,),V%

)."7*%&/*(,$"83%,%/&)*(%$&&71%Distractions

can cause you to lose control.

Page 2 ;&(%$*4.8"4,7%<'*#$"&8#=%/7*,#*%4,77%>?@@@?@AA?BCDC1 Item 64754 64756

2� 67*4$("4,7%#,2*$V

a� J&)*(%$&&7%/7'3#%5'#$%5,$4.%$.*%&'$7*$1%

M*W*(%5&9"2V%$.*%/7'3%"8%,8V%),V1%U&%8&$%'#*%
,8V%,9,/$*(%/7'3#%)"$.%*,($.*9%[3(&'89*9\%
/&)*(%$&&7#1%Unmodified plugs and matching

outlets will reduce risk of electric shock.

b� FW&"9%+&9V%4&8$,4$%)"$.%*,($.*9%&(%

3(&'89*9%#'(2,4*#=%#'4.%,#%/"/*#=%
(,9",$&(#=%(,83*#%,89%(*2("3*(,$&(#1%

There is an increased risk of electric shock
if your body is earthed or grounded.

c� U&%8&$%*Z/&#*%/&)*(%$&&7#%$&%(,"8%&(%)*$%

4&89"$"&8#1%Water entering a power tool

will increase the risk of electric shock.

d� U&%8&$%,+'#*%$.*%4&(91%M*W*(%'#*%$.*%4&(9%

2&(%4,((V"83=%/'77"83%&(%'8/7'33"83%$.*%/&)*(%
$&&71%Y**/%4&(9%,),V%2(&5%.*,$=%&"7=%#.,(/%
*93*#%&(%5&W"83%/,($#1%Damaged or entangled

cords increase the risk of electric shock.

e� Q.*8%&/*(,$"83%,%/&)*(%$&&7%&'$9&&(#=%

'#*%,8%*Z$*8#"&8%4&(9%#'"$,+7*%2&(%&'$9&&(%
'#*1%Use of a cord suitable for outdoor

use reduces the risk of electric shock.

f� L2%&/*(,$"83%,%/&)*(%$&&7%"8%,%9,5/%7&4,$"&8%

"#%'8,W&"9,+7*=%'#*%,%3(&'89%2,'7$%4"(4'"$%
"8$*(('/$*(%[R;OL\%/(&$*4$*9%#'//7V1%Use of

a GFCI reduces the risk of electric shock.

3� J*(#&8,7%#,2*$V

a� E$,V%,7*($=%),$4.%).,$%V&'%,(*%9&"83%,89%

'#*%4&55&8%#*8#*%).*8%&/*(,$"83%,%
/&)*(%$&&71%U&%8&$%'#*%,%/&)*(%$&&7%)."7*%
V&'%,(*%$"(*9%&(%'89*(%$.*%"827'*84*%&2%
9('3#=%,74&.&7%&(%5*9"4,$"&81%%A moment

of inattention while operating power tools
may result in serious personal injury.

b� P#*%/*(#&8,7%/(&$*4$"W*%*<'"/5*8$1%F7),V#%

)*,(%*V*%/(&$*4$"&81%%Protective equipment

such as dust mask, non-skid safety shoes, hard
hat, or hearing protection used for appropriate
conditions will reduce personal injuries.

c� J(*W*8$%'8"8$*8$"&8,7%#$,($"831%68#'(*%

$.*%#)"$4.%"#%"8%$.*%&22?/&#"$"&8%+*2&(*%
4&88*4$"83%$&%/&)*(%#&'(4*%,890&(%
+,$$*(V%/,4X=%/"4X"83%'/%&(%4,((V"83%$.*%
$&&71%Carrying power tools with your finger

on the switch or energizing power tools that
have the switch on invites accidents.

d� K*5&W*%,8V%,9]'#$"83%X*V%&(%)(*84.%

+*2&(*%$'(8"83%$.*%/&)*(%$&&7%&81%%A wrench

or a key left attached to a rotating part of the
power tool may result in personal injury.

e� U&%8&$%&W*((*,4.1%Y**/%/(&/*(%

2&&$"83%,89%+,7,84*%,$%,77%$"5*#1 This

enables better control of the power
tool in unexpected situations.

f� U(*##%/(&/*(7V1%U&%8&$%)*,(%7&&#*%47&$."83%

&(%]*)*7(V1%Y**/%V&'(%.,"(=%47&$."83%
,89%37&W*#%,),V%2(&5%5&W"83%/,($#1%%

Loose clothes, jewelry or long hair
can be caught in moving parts.

g� L2%9*W"4*#%,(*%/(&W"9*9%2&(%$.*%4&88*4$"&8%

&2%9'#$%*Z$(,4$"&8%,89%4&77*4$"&8%
2,4"7"$"*#=%*8#'(*%$.*#*%,(*%4&88*4$*9%
,89%/(&/*(7V%'#*91%%Use of dust collection

can reduce dust-related hazards.

h� U&%8&$%7*$%2,5"7",("$V%3,"8*9%2(&5%2(*<'*8$%

'#*%&2%$&&7#%,77&)%V&'%$&%+*4&5*%
4&5/7,4*8$%,89%"38&(*%$&&7%#,2*$V%
/("84"/7*#1%%A careless action can cause

severe injury within a fraction of a second.

i� Only use safety equipment that has 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
specific hazards in the work area�

j� 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�

k� When using a handheld power tool,

maintain a firm grip on the tool with
both hands to resist starting torque�

l� Do not leave the tool unattended when the

Battery Pack is connected� Turn off the tool,
and remove the Battery Pack before leaving�

m� This product is not a toy�

Keep it out of reach of children�

n� 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�

o� 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�

4� J&)*(%$&&7%'#*%,89%4,(*

a� U&%8&$%2&(4*%$.*%/&)*(%$&&71%P#*%$.*%4&((*4$%

/&)*(%$&&7%2&(%V&'(%,//7"4,$"&81%%The correct
power tool will do the job better and safer
at the rate for which it was designed.

b� U&%8&$%'#*%$.*%/&)*(%$&&7%"2%$.*%#)"$4.%

9&*#%8&$%$'(8%"$%&8%,89%&221%%Any power

tool that cannot be controlled with the switch
is dangerous and must be repaired.

c� U"#4&88*4$%$.*%/7'3%2(&5%$.*%/&)*(%

#&'(4*%,890&(%(*5&W*%$.*%+,$$*(V%/,4X=%
"2%9*$,4.,+7*=%2(&5%$.*%/&)*(%$&&7%+*2&(*%
5,X"83%,8V%,9]'#$5*8$#=%4.,83"83%
,44*##&("*#=%&(%#$&("83%/&)*(%$&&7#1%%

Such preventive safety measures reduce the
risk of starting the power tool accidentally.

d� E$&(*%"97*%/&)*(%$&&7#%&'$%&2%$.*%(*,4.%&2%

4."79(*8%,89%9&%8&$%,77&)%/*(#&8#%'82,5"7",(%
)"$.%$.*%/&)*(%$&&7%&(%$.*#*%"8#$('4$"&8#%
$&%&/*(,$*%$.*%/&)*(%$&&71%%Power tools are

dangerous in the hands of untrained users.

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e� N,"8$,"8%/&)*(%$&&7#%,89%,44*##&("*#1%

O.*4X%2&(%5"#,7"385*8$%&(%+"89"83%&2%
5&W"83%/,($#=%+(*,X,3*%&2%/,($#%,89%,8V%
&$.*(%4&89"$"&8%$.,$%5,V%,22*4$%$.*%/&)*(%
$&&7^#%&/*(,$"&81%L2%9,5,3*9=%.,W*%$.*%/&)*(%

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$&&7%(*/,"(*9%+*2&(*%'#*1%%Many accidents

are caused by poorly maintained power tools.

f� Y**/%4'$$"83%$&&7#%#.,(/%,89%47*,81%%Properly

maintained cutting tools with sharp cutting edges
are less likely to bind and are easier to control.

g� P#*%$.*%/&)*(%$&&7=%,44*##&("*#%,89%$&&7%+"$#%

*$41%"8%,44&(9,84*%)"$.%$.*#*%"8#$('4$"&8#=%
$,X"83%"8$&%,44&'8$%$.*%)&(X"83%4&89"$"&8#%
,89%$.*%)&(X%$&%+*%/*(2&(5*91%%Use of the

power tool for operations different from those
intended could result in a hazardous situation.

h� Y**/%.,897*#%,89%3(,#/"83%#'(2,4*#%

9(V=%47*,8%,89%2(**%2(&5%&"7%,89%3(*,#*1%%

Slippery handles and grasping surfaces
do not allow for safe handling and control
of the tool in unexpected situations.

5� E*(W"4*

a� _,W*%V&'(%/&)*(%$&&7%#*(W"4*9%+V%,%

<',7"2"*9%(*/,"(%/*(#&8%'#"83%&87V%"9*8$"4,7%
(*/7,4*5*8$%/,($#1%%This will ensure that

the safety of the power tool is maintained.

b� Maintain labels and nameplates on the tool�

These carry important safety information�
If unreadable or missing, contact
Harbor Freight Tools for a replacement�

6� S,$$*(V%$&&7%'#*%,89%4,(*

a� J(*W*8$%'8"8$*8$"&8,7%#$,($"831%Ensure the

switch is in the off-position before connecting
to battery pack, picking up or carrying the
power tool. Carrying the power tool with your
finger on the switch or energizing power tool
that have the switch on invites accidents.

b� U"#4&88*4$%$.*%+,$$*(V%/,4X%2(&5%$.*%

/&)*(%$&&7%+*2&(*%5,X"83%,8V%,9]'#$5*8$#=%

4.,83"83%,44*##&("*#=%&(%#$&("83%/&)*(%
$&&71%Such preventive safety measures reduce

the risk of starting the power tool accidentally.

c� K*4.,(3*%&87V%)"$.%$.*%4.,(3*(%#/*4"2"*9%+V%

$.*%5,8'2,4$'(*(1%A charger that is suitable

for one type of battery pack may create a risk
of fire when used with another battery pack.

d� P#*%/&)*(%$&&7#%&87V%)"$.%#/*4"2"4,77V%

9*#"38,$*9%+,$$*(V%/,4X#1%Use of any other

battery packs may create a risk of injury and fire.

e� Q.*8%+,$$*(V%/,4X%"#%8&$%"8%'#*=%X**/%

"$%,),V%2(&5%&$.*(%5*$,7%&+]*4$#=%7"X*%
/,/*(%47"/#=%4&"8#=%X*V#=%8,"7#=%#4(*)#%
&(%&$.*(%#5,77%5*$,7%&+]*4$#=%$.,$%4,8%
5,X*%,%4&88*4$"&8%2(&5%&8*%$*(5"8,7%
$&%,8&$.*(1%Shorting the battery terminals

together may cause burns or a fire.

f� P89*(%,+'#"W*%4&89"$"&8#=%7"<'"9%5,V%+*%

*]*4$*9%2(&5%$.*%+,$$*(V`%,W&"9%4&8$,4$1%

If contact accidentally occurs, flush with
water. If liquid contacts eyes, additionally
seek medical help. Liquid ejected from the
battery may cause irritation or burns.

g� U&%8&$%'#*%,%+,$$*(V%/,4X%&(%/&)*(%$&&7%$.,$%

"#%9,5,3*9%&(%5&9"2"*91%Damaged or modified

batteries may exhibit unpredictable behavior
resulting in fire, explosion or risk of injury.

h� U&%8&$%*Z/&#*%,%+,$$*(V%/,4X%&(%/&)*(%

$&&7%$&%2"(*%&(%*Z4*##"W*%$*5/*(,$'(*1%

Exposure to fire or temperature above
265°F may cause explosion.

i� ;&77&)%,77%4.,(3"83%"8#$('4$"&8#%,89%9&%

8&$%4.,(3*%$.*%+,$$*(V%/,4X%&(%/&)*(%$&&7%
&'$#"9*%&2%$.*%$*5/*(,$'(*%(,83*%#/*4"2"*9%
"8%$.*%"8#$('4$"&8#1%Charging improperly or at

temperatures outside of the specified range may
damage the battery and increase the risk of fire.

j� _,W*%#*(W"4"83%/*(2&(5*9%+V%,%<',7"2"*9%

(*/,"(%/*(#&8%'#"83%&87V%"9*8$"4,7%
(*/7,4*5*8$%/,($#1%This will ensure that

the safety of the product is maintained.

k� U&%8&$%5&9"2V%&(%,$$*5/$%$&%(*/,"(%$.*%/&)*(%

$&&7%&(%$.*%+,$$*(V%/,4X%*Z4*/$%,#%"89"4,$*9%
"8%$.*%"8#$('4$"&8#%2&(%'#*%,89%4,(*1

l� The battery Charger gets hot during

use� The Charger’s heat can build
up to unsafe levels and create a fire

hazard if it does not receive
adequate ventilation, due to an electrical fault, or
if it is used in a hot environment� Do not place
the Charger on a flammable surface� Do not
obstruct any vents on the Charger�

6#/*4",77V%,W&"9%/7,4"83%$.*%O.,(3*(%&8%
4,(/*$#%,89%('3#`%$.*V%,(*%8&$%&87V%
27,55,+7*=%+'$%$.*V%,7#&%&+#$('4$%W*8$#%
'89*(%$.*%O.,(3*(1%%Place the Charger on a

stable, solid, nonflammable surface (such as a
stable metal workbench or concrete floor) at
least 1 foot away from all flammable objects,
such as drapes or walls� Keep a fire
extinguisher and a smoke detector in the area�
Frequently monitor the Charger and
Battery Pack while charging�

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7� T"$."'5%S,$$*(V%E,2*$V%Q,(8"83#

TLG_LPN%SFGG6KL6E%EGIK6%
F%TFKR6%FNIPMG%I;%6M6KRH%FMU%%
QLTT%!6MG%;LK6%IK%6aJTIU6%
L;%NLEGK6FG6U-

a� Y**/%S,$$*(V%J,4X%9(V1

b� UI%MIG%UI%FMH%I;%G_6%;ITTIQLMR%

GI%G_6%SFGG6KH%JFOY­b% I/*8=
b% U(&/=
b% E.&($?4"(4'"$=
b% J'84$'(*=
b% L84"8*(,$*=%&(
b% 6Z/&#*%$&%$*5/*(,$'(*#%

3(*,$*(%$.,8%cABd;1

c� Charge Battery Pack only according

to its Charger’s instructions�

d� Inspect Battery Pack before every use;

do not use or charge if damaged�

8� E,2*$V%"8#$('4$"&8#%2&(%,77%&/*(,$"&8#

a� Q*,(%*,(%/(&$*4$&(#%).*8%L5/,4$%9("77"831%

Exposure to noise can cause hearing loss.

b� P#*%$.*%,'Z"7",(V%.,897*[#\1%Loss of

control can cause personal injury.

c� S(,4*%$.*%$&&7%/(&/*(7V%+*2&(*%'#*1%This

tool produces a high output torque and without
properly bracing the tool during operation, loss
of control may occur resulting in personal injury.

d� _&79%$.*%/&)*(%$&&7%+V%"8#'7,$*9%

3("//"83%#'(2,4*#=%).*8%/*(2&(5"83%,8%
&/*(,$"&8%).*(*%$.*%4'$$"83%,44*##&(V%&(%
2,#$*8*(#%5,V%4&8$,4$%."99*8%)"("83%&(%
"$#%&)8%4&(91%Cutting accessory contacting

a “live” wire may make exposed metal
parts of the power tool “live” and could
give the operator an electric shock.

e� Let bit cool before touching, changing

or adjusting it� Bits heat up dramatically
while in use, and can burn you�

f� If the drill bit jams, release the

Trigger immediately; drill torque
can cause injury or break bit�

9� E,2*$V%L8#$('4$"&8#%).*8%'#"83%7&83%9("77%+"$#

a� M*W*(%&/*(,$*%,$%."3.*(%#/**9%$.,8%$.*%

5,Z"5'5%#/**9%(,$"83%&2%$.*%9("77%+"$1%

At higher speeds, the bit is likely to bend if
allowed to rotate freely without contacting
the workpiece, resulting in personal injury.

b� F7),V#%#$,($%9("77"83%,$%7&)%#/**9%,89%)"$.%

$.*%+"$%$"/%"8%4&8$,4$%)"$.%$.*%)&(X/"*4*1%

At higher speeds, the bit is likely to bend if
allowed to rotate freely without contacting
the workpiece, resulting in personal injury.

c� F//7V%/(*##'(*%&87V%"8%9"(*4$%7"8*%)"$.%$.*%

+"$%,89%9&%8&$%,//7V%*Z4*##"W*%/(*##'(*1%%

Bits can bend causing breakage or loss
of control, resulting in personal injury.

10� E"7"4&#"#%E,2*$V%N*,#'(*#

Masonry drilling on materials such as
concrete (which contains crystalline silica)
can cause silicosis (a serious lung disease),
cancer and death� To reduce crystalline silica
exposures in the workplace and prevent
silicosis and silicosis-related deaths:

a� Conduct air monitoring to measure

worker exposures�

b� Use containment methods to control the hazard

and protect adjacent workers from exposure�

c� Practice good personal hygiene to avoid

unnecessary exposure to silica dust�

d� Wear washable or disposable protective

clothes at the work site� Shower and change
into clean clothes before leaving the work
site to prevent contamination of cars, homes
and other work areas� Avoid skin exposure�

e� Always wear a NIOSH approved respirator and

safety goggles� Ventilate the work area properly�

f� Provide periodic medical examinations

for all workers who may be
exposed to crystalline silica�

g� Post signs to warn workers about

the hazard and to inform them about
required protective equipment�

h� Provide workers with training that includes

information about health effects, work practices
and protective equipment for crystalline silica�

i� Report all cases of silicosis to State health

departments and to OSHA or the Mine
Safety and Health Administration (MSHA)�

11� !"+(,$"&8%E,2*$V

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:

a� 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 should not use this tool�

EF;6GHIJ6KFGLIMNFLMG6MFMO6 E6GPJ

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EF;6GH IJ6KFGLIM NFLMG6MFMO6E6GPJ

If you feel any symptoms related to
vibration (such as tingling, numbness,
and white or blue fingers), seek medical
advice as soon as possible�

b� Do not smoke during use� Nicotine reduces

the blood supply to the hands and fingers,
increasing the risk of vibration-related injury�

c� Wear suitable gloves to reduce the

vibration effects on the user�

d� Use tools with the lowest vibration

when there is a choice�

e� Include vibration-free periods each day of work�

f� Grip tool as lightly as possible (while still keeping

safe control of it)� Let the tool do the work�

g� To reduce vibration, maintain the tool as

explained in this manual� If any abnormal
vibration occurs, stop use immediately�

R(&'89"83

GI%JK6!6MG%6T6OGKLO%E_IOY%FMU%U6FG_%;KIN%LMOIKK6OG%RKIPMULMR-%
O.*4X%)"$.%,%<',7"2"*9%*7*4$("4",8%"2%V&'%,(*%"8%9&'+$%,#%$&%).*$.*(%$.*%&'$7*$%"#%/(&/*(7V%
3(&'89*91%%U&%8&$%5&9"2V%$.*%/&)*(%4&(9%/7'3%/(&W"9*9%)"$.%$.*%4.,(3*(1%%U&%8&$%'#*%$.*%

+*2&(*%'#*1%%L2%$.*%/7'3%)"77%8&$%2"$%$.*%&'$7*$=%.,W*%,%/(&/*(%&'$7*$%"8#$,77*9%+V%,%<',7"2"*9%*7*4$("4",81

4.,(3*(%"2%$.*%/&)*(%4&(9%&(%/7'3%"#%9,5,3*91%%L2%9,5,3*9=%.,W*%"$%(*/,"(*9%+V%,%#*(W"4*%2,4"7"$V%

6Z$*8#"&8%O&(9#

M&$*- Extension cords must not be used with this item’s Charger�

EV5+&7&3V

WARNING marking
concerning Risk of Fire�
Do not cover Charger
ventilation ducts�
Charge on fireproof surface only�
WARNING marking concerning
Risk of Electric Shock�
Properly connect Charger’s power
cord to appropriate outlet�

WARNING marking concerning
Risk of Explosion�
Do not puncture, short, or open
battery packs and do not charge
damaged battery packs�

WARNING marking concerning
Risk of Hearing Loss�
Wear hearing protection�

!

e

F

n0 xxxx/min�

Double Insulated

Volts

Alternating Current

Amperes

No Load Revolutions
per Minute (RPM)

WARNING marking concerning Risk
of Eye Injury� Wear ANSI-approved
safety goggles with side shields�

Read the manual before
set-up and/or use�

Page 6 ;&(%$*4.8"4,7%<'*#$"&8#=%/7*,#*%4,77%>?@@@?@AA?BCDC1 Item 64754 64756

%%E/*4"2"4,$"&8#

N&9*7%>CD>O?S> N&9*7%>CDcO?S>

Battery Rating 20 V / 1.5 Ah 20 V / 1.5 Ah

Battery Type Li-ion Li-ion

No Load Speed 0-450 / 0-1,700 0-450 / 0-1,700

BPM – 0-7,200 / 0-27,200

Chuck Size 1/2" 1/2"

%%E*$'/%?%S*2&(*%P#*-

% K*,9%$.*%6MGLK6%LNJIKGFMG%EF;6GH%LM;IKNFGLIM%#*4$"&8%,$%$.*%+*3"88"83%&2%$."#%

5,8',7%"847'9"83%,77%$*Z$%'89*(%#'+.*,9"83#%$.*(*"8%+*2&(*%#*$%'/%&(%'#*%&2%$."#%/(&9'4$1

%M&$*- For additional information regarding the parts listed in the

following pages, refer to Parts List and Diagram on page 12�

;'84$"&8#

EF;6GHIJ6KFGLIMNFLMG6MFMO6 E6GPJ

f,)#

O.'4X

N&9*%E*7*4$&(

[N&9*7%>CDcO?S>%&87V\

G&(<'*%

E*7*4$&(

G("33*(

Q&(X%

T"3.$

E/**9%

E*7*4$&(

U"(*4$"&8%

E)"$4.

S,$$*(V

Page 7;&(%$*4.8"4,7%<'*#$"&8#=%/7*,#*%4,77%>?@@@?@AA?BCDC1Item 64754 64756

I/*(,$"83%L8#$('4$"&8#

%K*,9%$.*%6MGLK6%LNJIKGFMG%EF;6GH%LM;IKNFGLIM%#*4$"&8%,$%$.*%+*3"88"83%&2%$."#%

5,8',7%"847'9"83%,77%$*Z$%'89*(%#'+.*,9"83#%$.*(*"8%+*2&(*%#*$%'/%&(%'#*%&2%$."#%/(&9'4$1

EF;6GH IJ6KFGLIM NFLMG6MFMO6E6GPJ

G&&7%E*$%P/

GI%JK6!6MG%E6KLIPE%LMfPKH%;KIN%FOOLU6MGFT%IJ6KFGLIM-%
N,X*%#'(*%$.,$%$.*%G("33*(%"#%"8%$.*%&22?/&#"$"&8%,89%(*5&W*%"$#%S,$$*(V%
J,4X%+*2&(*%/*(2&(5"83%,8V%/(&4*9'(*%"8%$."#%#*4$"&81

S,$$*(V%O.,(3"83

Charge battery after unpacking and before using this tool� Follow instructions included with battery charger�

S"$%L8#$,77,$"&8

OFPGLIMg Wear heavy-duty work gloves to provide

protection when inserting and removing drill bits�
Drill bits become very hot during use�
Do not remove drill bits until the bit has cooled�

MIGLO6-%P#*%#.,(/%+"$#1%U'77=%+*8$=%&(%9,5,3*9%
+"$#%)"77%4,'#*%#$(*##%&8%$.*%9("77%,890&(%+(*,X1

MIGLO6-%%P#*%#.,(/%+"$#1%%U'77=%+*8$=%&(%9,5,3*9%
+"$#%)"77%4,'#*%#$(*##%&8%$.*%$&&7%,890&(%+(*,X1

1� While holding the ring behind the collar of

the Chuck with one hand, rotate the collar of
the Chuck counterclockwise until the jaws of
the drill are opened enough for bit to fit�

2� Use a bit designed for the workpiece type�

Place the desired drill, screwdriver, bolt or nut
bit into the drill between the Chuck Jaws�

M&$*- In addition to single or double-ended
bits, adapters with hexagonal shafts with
matching socket heads can also be used�

3� Hand tighten the Chuck until the bit is held securely

in place, centered between the Chuck Jaws�

F$$,4."83%S*7$%O7"/

Attach Belt Clip to Handle using supplied
Screw� Clip may be attached to either side�

S*7$%O7"/

N&9*%E*7*4$"&8%[N&9*7%>CDcO?S>%&87V\

Rotate Mode Selector so arrow is pointing to desired mode�

• %%U("77"83%N&9*%?%For drilling
in wood and metal�

• %%U("W"83 N&9*%? For driving
screws, bolts and installing nuts�

• %%_,55*(%U("77"83 N&9*%?
For drilling in masonry�

E/**9%E*7*4$"&8

Adjust Speed Selector to desired setting: • Low Speed: Select 1

• High Speed: Select 2

E4(*)

Page 8 ;&(%$*4.8"4,7%<'*#$"&8#=%/7*,#*%4,77%>?@@@?@AA?BCDC1 Item 64754 64756

E*$$"83%G&(<'*

Set torque by rotating Torque Selector�

a� P#*%$.*%8'5+*(*9%$&(<'*%#*$$"83#%2(&5%

>%$&%>C%2&(%9("W"83%#4(*)#=%+&7$#%,89%8'$#1%%
[;&(%N&9*7%>CDcO?S>%&87V=%,7#&%#*7*4$%

U("W"83%N&9*%)"$.%$.*%N&9*%E*7*4$&(\1

• The torque setting required depends on the
object being driven� In the case of screws,
consider the size, length, and type of material�

Q&(X/"*4*%,89%Q&(X%F(*,%E*$%P/

• If a pilot hole has been drilled into the material,
a lower torque setting will be required�

• Adjust the torque setting low enough to allow
a safety margin� Use a very low torque
setting when first driving small screws into
soft materials� Then adjust the setting as
the proper force required is determined�

b� P#*%$.*%#*$$"83%5,(X*9%+V%$.*%9("77%"4&8%2&(%

9("77"831%%[;&(%N&9*7%>CDcO?S>%&87V=%#*7*4$%

U("77"83%N&9*%)"$.%$.*%N&9*%E*7*4$&(\1

EF;6GHIJ6KFGLIMNFLMG6MFMO6 E6GPJ

1� Designate a work area that is clean and well lit�

The work area must not allow access by children
or pets to prevent distraction and injury�

R*8*(,7%L8#$('4$"&8#%2&(%P#*

1� Lock Trigger, then insert a fully charged Battery

Pack, making sure that it clicks into place securely�

2� Set Direction Switch:

;&(),(9- Push Switch in on right side
(arrow pointing forward) for clockwise rotation�

K*W*(#*- Push Switch in on left
side (arrow pointing backward) for
counter-clockwise rotation�

G("33*(%T&4X- Push Switch to the
center to lock the Trigger�

OFPGLIMg%%E*$%U"(*4$"&8%E)"$4.%$&%4*8$*(%
G("33*(%T&4X%/&#"$"&8%9'("83%#*$%'/=%).*8%

4.,83"83%+"$#%&(%).*8%$&&7%"#%"97*1%%

J'#.%%

2&(%

;&(),(9

J'#.%$&%O*8$*(%$&%

TIOY%GKLRR6K

J'#.%%

2&(%

K*W*(#*

2� Secure loose workpieces using a vise or clamps

(not included) to prevent movement while working�

3� There must not be objects, such as utility lines,

nearby that will present a hazard while working�

3� Install bit, select Mode (Model 1792C-B1 only),

Torque (when driving), Speed and Direction�

MIGLO6-%U&%8&$%4.,83*%9"(*4$"&8%&2%(&$,$"&8%
)."7*%O.'4X%"#%(&$,$"831%%Wait until Chuck has come

to a complete stop before changing direction�

4� Press Trigger� The Work Light will turn

on when Trigger is pressed and turn off a
few seconds after Trigger is released�

5� When inserting or removing a screw or bolt, use

slight pressure at first to keep the bit in the head
of the screw or bolt and cause the screw or bolt
to thread into or unthread from the material�

6� When drilling a hole, let the tool do the work,

using only enough pressure to follow the
drill as it cuts the hole in the material�

7� When drilling a hard, smooth surface, use a center

punch (not included) to mark the desired hole�

8� When finished using the Drill, release Trigger

and center Direction Switch to lock Trigger�

9� To prevent accidents, remove tool’s Battery

Pack after use� Clean, then store the
tool indoors out of children’s reach�

Page 9;&(%$*4.8"4,7%<'*#$"&8#=%/7*,#*%4,77%>?@@@?@AA?BCDC1Item 64754 64756

U("77"83%"8%Q&&9

1� Use high speed drill bits for wood drilling�

(For Model 1792C-B1 only, select Drilling
Mode with the Mode Selector)�

2� Start wood drilling at very low speed

EF;6GH IJ6KFGLIM NFLMG6MFMO6E6GPJ

to keep the bit from slipping� Increase
speed as drill bit bites into wood�

U("77"83%"8%N*$,7

1� Use high speed drill bits for metal drilling�

(For Model 1792C-B1 only, select Drilling
Mode with the Mode Selector)�

2� Start metal drilling at very low speed to keep the bit

from slipping� Maintain the speed and pressure,
allowing for cutting without overheating the bit�

U("77"83%"8%N,#&8(V%[N&9*7%>CDcO?S>%&87V\

1� Use carbide or specialty bits for masonry drilling

and set mode to Hammer Drilling�

2� When drilling in walls, start with regular

drilling and, once tile is pierced, continue
with Hammer Drilling mode�

O&84(*$*%U("77"83%G"/#-

a� Do not add water to the drill hole�

b� Clean the bit flutes regularly while drilling�

3� When drilling through holes, place a block

or wood behind the workpiece to prevent
ragged edges on the back side of the hole�

3� When drilling large holes in metal surfaces, use a

small drill bit at first� Then finish with a larger drill
bit� Be sure to lubricate the bit with oil to improve
the drilling action and help increase bit life�

c� Back the bit out of the hole often during drilling,

especially when drilling deep holes�

d� Grease the bit shank and bit holder and keep

the shank end of the bit dust and debris free�

e� Use the shortest bit practical�

f� When drilling deep holes, work in stages,

use a short bit for the beginning of the hole,
then change to a longer bit�

Page 10 ;&(%$*4.8"4,7%<'*#$"&8#=%/7*,#*%4,77%>?@@@?@AA?BCDC1 Item 64754 64756

N,"8$*8,84*%,89%E*(W"4"83%L8#$('4$"&8#

%J(&4*9'(*#%8&$%#/*4"2"4,77V%*Z/7,"8*9%"8%$."#%5,8',7%5'#$%

+*%/*(2&(5*9%&87V%+V%,%<',7"2"*9%$*4.8"4",81

GI%JK6!6MG%E6KLIPE%LMfPKH%;KIN%FOOLU6MGFT%IJ6KFGLIM-%
N,X*%#'(*%$.,$%$.*%G("33*(%"#%"8%$.*%&22?/&#"$"&8%,89%(*5&W*%"$#%S,$$*(V%
J,4X%+*2&(*%/*(2&(5"83%,8V%/(&4*9'(*%"8%$."#%#*4$"&81

GI%JK6!6MG%E6KLIPE%LMfPKH%;KIN%GIIT%;FLTPK6-%
U&%8&$%'#*%9,5,3*9%*<'"/5*8$1%%L2%,+8&(5,7%8&"#*%&(%W"+(,$"&8%
&44'(#=%.,W*%$.*%/(&+7*5%4&((*4$*9%+*2&(*%2'($.*(%'#*1

O7*,8"83=%N,"8$*8,84*=%,89%T'+("4,$"&8

EF;6GHIJ6KFGLIMNFLMG6MFMO6 E6GPJ

1� S6;IK6%6FO_%PE6= inspect the general

condition of the Tool� Check for:

• leaking, swollen, or cracked Battery Pack

• loose hardware

• misalignment or binding of moving parts

• cracked or broken parts

• any other condition that may
affect its safe operation�

2� F;G6K%PE6= wipe external surfaces

of the Tool with clean cloth�

3� Li-Ion BATTERY MUST BE RECYCLED OR

DISPOSED OF PROPERLY�
Do not short, incinerate or open battery�

4� Disconnect Battery Pack and store Battery Pack,

Charger, and Tool in dry, indoor area out of
reach of children and away from metal objects
(i�e�, paperclips, coins) to prevent shorting�

G(&'+7*#.&&$"83

J(&+7*5 J&##"+7*%O,'#*# T"X*7V%E&7'$"&8#

Tool will not start� 1� Battery Pack not properly

Tool operates slowly� 1� Forcing tool to work too fast�

Performance
decreases over time�

Excessive noise
or rattling�
Overheating� 1� Forcing tool to work too fast�

connected�

2� Battery Pack not properly

charged�

3� Battery Pack burnt-out�

4� Internal damage or wear� (Carbon

brushes or Trigger, for example�)

2� Battery Pack wearing out�

1� Carbon brushes worn

or damaged�

2� Bit dull or damaged�
Internal damage or wear� (Carbon
brushes or bearings, for example�)

2� Bit dull or damaged�

3� Blocked motor housing vents�

1� Remove Battery Pack, make sure there are no

obstructions, reinsert the Battery Pack according
to its shape (it should only fit one way), and press
firmly until the Battery Pack locks in place�

2� Make sure Charger is connected and

operating properly� Give enough time for
Battery Pack to recharge properly�

3� Dispose of old Battery Pack properly or recycle�

Replace Battery Pack�

4� Have technician service tool�

1� Allow tool to work at its own rate�

2� Dispose of old Battery Pack properly or recycle�

Replace Battery Pack�

1� Have qualified technician replace brushes�

2� Keep bits sharp� Replace as needed�
Have technician service tool�

1� Allow tool to work at its own rate�

2� Keep bits sharp� Replace as needed�

3� Wear ANSI-approved safety goggles and

NIOSH-approved dust mask/respirator while
blowing dust out of motor using compressed air�

% ;&77&)%,77%#,2*$V%/(*4,'$"&8#%).*8*W*(%9",38&#"83%&(%#*(W"4"83%$.*%$&&71%%%

U"#4&88*4$%S,$$*(V%J,4X%,89%O.,(3*(%/&)*(%#'//7V%+*2&(*%#*(W"4*1

Page 11;&(%$*4.8"4,7%<'*#$"&8#=%/7*,#*%4,77%>?@@@?@AA?BCDC1Item 64754 64756

J,($#%T"#$%,89%U",3(,5

JT6FE6%K6FU%G_6%;ITTIQLMR%OFK6;PTTH

EF;6GH IJ6KFGLIM NFLMG6MFMO6E6GPJ

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�

J,($#%T"#$%2&(%>CD>O?S>

J,($ U*#4("/$"&8 h$V

1 Screw 1
2 Chuck 1
3 Screw 13
4 Torque Sleeve 1

5 Torque Sleeve Ferrule 1
6-1 Screw 4
6-2 Torque Cover Plate 1
6-3 Internal Thread 1
6-4 Torque Spring 1
6-5 Torque Spacer 1
6-6 Torque Roller Pin 6
6-7 Steel Ball 6
6-8 Output Shaft 1
6-9 Ball Bearing 2

6-10 Tuning Fork 1
6-11 Gearbox Front Shell 1
6-12 O-Ring 1
6-13 Jump Ring 1
6-14 Self-Locking Ring 1
6-15 Self-Locking Pin 2
6-16 Self-Locking Core 1
6-17 Inner Gear Ring 1
6-18 Self-Locking Center Frame 1
6-19 Planet Gear 5
6-20 Spacer 1
6-21 Planet Gear Carrier 1
6-22 Gearbox Rear Shell 1

J,($ U*#4("/$"&8 h$V

6-23 Inner Gear Ring Side Pin 4
6-24 Toggle Bracket 1
6-25 Rear Shell Gear Ring 1
6-26 Planet Gear 5
6-27 Screw 4
6-28 Toggle Gear Ring 1
6-29 Planet Carrier 1
6-30 Gear Ring 1
6-31 Planet Gear 3
6-32 Large Spacer 1
6-33 Motor End Cap 1

7 Motor Gear 1
8 Screw 3

9 Motor 1
10 Push Rod 1
11 Selector Button 1
12 Selector Button Spring 1
13 Spring 1
14 Right Housing 1
15 Protective Plate Bracket Assembly 1
16 Switch Assembly 1
17 Battery Pack Assembly 1
18 Transparent Cover 1
19 Belt Clip 1
20 Left Housing 1
21 Charger (not shown) 1

Page 12 ;&(%$*4.8"4,7%<'*#$"&8#=%/7*,#*%4,77%>?@@@?@AA?BCDC1 Item 64754 64756

F##*5+7V%U",3(,5%2&(%>CD>O?S>

EF;6GHIJ6KFGLIMNFLMG6MFMO6 E6GPJ

Page 13;&(%$*4.8"4,7%<'*#$"&8#=%/7*,#*%4,77%>?@@@?@AA?BCDC1Item 64754 64756

J,($#%T"#$%2&(%>CDcO?S>

J,($ U*#4("/$"&8 h$V

1 Screw 1
2 Chuck 1

EF;6GH IJ6KFGLIM NFLMG6MFMO6E6GPJ

3 Screw 13
4 Torque Sleeve 1

5 Torque Sleeve Ferrule 1
6-1 Output Shaft 1
6-2 Ball Bearing 1
6-3 Steel Ball 19
6-4 Small Spacer 1
6-5 Toggle Knob 1
6-6 Impact Spring 1
6-7 Impact Moving Plate 1
6-8 Movable Fluted Disc 1
6-9 Fixed Fluted Disc 1

6-10 Torque Spring 1
6-11 Gearbox Front Shell 1
6-12 Screw 4
6-13 Spacer 1
6-14 Tuning Fork 1
6-15 Cover Plate 1
6-16 Spring 2
6-17 Inner Gear Ring 1
6-18 Torque Roller Pin 6
6-19 Steel Ball 6
6-20 Torque Spacer 1
6-21 Screw 1
6-22 Toggle Ring 1
6-23 Internal Thread 1
6-24 Indicator Ring 1
6-25 Jump Ring 1
6-26 Self-Locking Ring 1
6-27 Self-Locking Pin 2
6-28 Self-Locking Core 1

J,($ U*#4("/$"&8 h$V

6-29 Planet Carrier 1
6-30 Planet Gear 5
6-31 Spacer 1
6-32 Rear Shell Gear Ring 1
6-33 Gearbox Rear Shell 1
6-34 Screw 4
6-35 Planet Gear Carrier 1
6-36 Planet Gear 5
6-37 Toggle Gear Ring 1
6-38 Toggle Bracket 1
6-39 Inner Gear Ring Side Pin 4
6-40 Planet Gear Carrier 1
6-41 Planet Gear 3
6-42 Gear Ring 1
6-43 Large Spacer 1
6-44 Motor End Cap 1
6-45 Indicator Ring Insert 1

7 Motor Gear 1
8 Screw 3

9 Motor 1
10 Push Rod 1
11 Selector Button 1
12 Selector Button Spring 1
13 Spring 1
14 Right Housing 1
15 Protective Plate Bracket Assembly 1
16 Switch Assembly 1
17 Battery Pack Assembly 1
18 Transparent Cover 1
19 Belt Clip 1
20 Left Housing 1
21 Charger (not shown) 1

K*4&(9%J(&9'4$^#%E*(",7%M'5+*(%_*(*-%

M&$*-%L2%/(&9'4$%.,#%8&%#*(",7%8'5+*(=%(*4&(9%5&8$.%,89%V*,(%&2%/'(4.,#*%"8#$*,91

M&$*- Some parts are listed and shown for illustration purposes only, and are not available individually

as replacement parts� Parts may not be interchangeable� Specify item number when ordering�

Page 14 ;&(%$*4.8"4,7%<'*#$"&8#=%/7*,#*%4,77%>?@@@?@AA?BCDC1 Item 64754 64756

F##*5+7V%U",3(,5%2&(%>CDcO?S>

EF;6GHIJ6KFGLIMNFLMG6MFMO6 E6GPJ

Page 15;&(%$*4.8"4,7%<'*#$"&8#=%/7*,#*%4,77%>?@@@?@AA?BCDC1Item 64754 64756

T"5"$*9%Dk%U,V%Q,((,8$V

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�

ijD>%N"##"&8%I,X#%S7W91%%b%%JI%S&Z%AkkD%%b%%O,5,("77&=%OF%Dik>>%%b%%>?@@@?@AA?BCDC