Bauer 1761C-B Assembly instructions

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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 (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. 22b
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©2021 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.
Read this material before using this product.
Failure to do so can result in serious injury.
SAVE THIS MANUAL.

Page 2 ;&(%$*4.8"4,7%I'*#$"&8#>%/7*,#*%4,77%JKLLLKLMMKNOPO1 Item 56401
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Safety ........................................................................2
Specifications ............................................................8
Setup .........................................................................8
Operation..................................................................10
Maintenance.............................................................13
Warranty ...................................................................16
FB=VUVE%HRW<SXH%BVY%Y6;UVUQUSVH
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.
UWTS=QBVQ%HB;6QR%UV;S=WBQUSV
E*8*(,7%T&)*(%Q&&7%H,2*$D%F,(8"83#
=*,9%,77%#,2*$D%),(8"83#%,89%"8#$('4$"&8#1%%
Failure to follow the warnings and instructions may result in electric shock, fire and/or serious injury.
H,Z*%,77%),(8"83#%,89%"8#$('4$"&8#%2&(%2'$'(*%(*2*(*84*1%

F&([%B(*,%H,2*$D
1. \**/%)&([%,(*,%47*,8%,89%)*77%7"$1%%
Cluttered or dark areas invite accidents.
2. Y&%8&$%&/*(,$*%/&)*(%$&&7#%"8%*]/7&#"Z*%
,$5&#/.*(*#>%#'4.%,#%"8%$.*%/(*#*84*%&2%
27,55,+7*%7"I'"9#>%3,#*#%&(%9'#$1%%Power tools

3. \**/%4."79(*8%,89%+D#$,89*(#%
,),D%)."7*%&/*(,$"83%,%/&)*(%$&&71%%
Distractions can cause you to lose control.

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Y&%8&$%*]/&#*%/&)*(%$&&7#%$&%(,"8%&(%)*$%4&89"$"&8#1

T*(#&8,7%H,2*$D
1. H$,D%,7*($>%),$4.%).,$%D&'%,(*%9&"83%,89%
'#*%4&55&8%#*8#*%).*8%&/*(,$"83%,%
/&)*(%$&&71%%Y&%8&$%'#*%,%/&)*(%$&&7%)."7*%
D&'%,(*%$"(*9%&(%'89*(%$.*%"827'*84*%&2%
9('3#>%,74&.&7%&(%5*9"4,$"&81 A moment


2. ?#*%#,2*$D%*I'"/5*8$1%%B7),D#%)*,(%*D*%
/(&$*4$"&81
dust mask, non-skid safety shoes, hard hat,


3. T(*Z*8$%'8"8$*8$"&8,7%#$,($"831%68#'(*%
$.*%#)"$4.0$("33*(%"#%"8%$.*%&22K/&#"$"&8%
+*2&(*%4&88*4$"83%$&%/&)*(%#&'(4*%,890
&(%+,$$*(D%/,4[>%/"4["83%'/%&(%4,((D"83%$.*%
$&&71

have the switch on invites accidents.
4. =*5&Z*%,8D%,9^'#$"83%[*D%&(%)(*84.%
+*2&(*%$'(8"83%$.*%/&)*(%$&&7%&81%%%


5. Y&%8&$%&Z*((*,4.1%%\**/%/(&/*(%2&&$"83%,89%
+,7,84*%,$%,77%$"5*#1 This enables better control

6. Y(*##%/(&/*(7D1%%Y&%8&$%)*,(%7&&#*%47&$."83%&(%
^*)*7(D1%%\**/%D&'(%.,"(>%47&$."83%,89%37&Z*#%
,),D%2(&5%5&Z"83%/,($#1 Loose clothes, jewelry

7. U2%9*Z"4*#%,(*%/(&Z"9*9%2&(%$.*%4&88*4$"&8%&2%
9'#$%*]$(,4$"&8%,89%4&77*4$"&8%2,4"7"$"*#>%*8#'(*%
$.*#*%,(*%4&88*4$*9%,89%/(&/*(7D%'#*91%%Use of
these devices can reduce dust-related hazards.
8. Only use safety equipment that has been approved
by an appropriate standards agency. Unapproved
safety equipment may not provide adequate
protection. Eye protection must be ANSI-approved
and breathing protection must be NIOSH-approved
for the specific hazards in the work area.
T&)*(%Q&&7%?#*%,89%G,(*
1. Y&%8&$%2&(4*%$.*%/&)*(%$&&71%%%
?#*%$.*%4&((*4$%/&)*(%$&&7%2&(%D&'(%,//7"4,$"&81

safer at the rate for which it was designed.
2. Y&%8&$%'#*%$.*%/&)*(%$&&7%"2%$.*%#)"$4.0$("33*(%
9&*#%8&$%$'(8%"$%&8%,89%&221%%%


3. Y"#4&88*4$%$.*%+,$$*(D%/,4[%2(&5%$.*%
/&)*(%$&&7%+*2&(*%5,["83%,8D%,9^'#$5*8$#>%
4.,83"83%,44*##&("*#>%&(%#$&("83%/&)*(%
$&&7#1%%

4. H$&(*%"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.
5. W,"8$,"8%/&)*(%$&&7#1%%G.*4[%2&(%5"#,7"385*8$%
&(%+"89"83%&2%5&Z"83%/,($#>%+(*,[,3*%&2%/,($#%
,89%,8D%&$.*(%4&89"$"&8%$.,$%5,D%,22*4$%$.*%
/&)*(%$&&7_#%&/*(,$"&81%%U2%9,5,3*9>%.,Z*%$.*%
/&)*(%$&&7%(*/,"(*9%+*2&(*%'#*1 Many accidents

6. \**/%4'$$"83%$&&7#%#.,(/%,89%47*,81%%%


bind and are easier to control.
7. ?#*%$.*%/&)*(%$&&7>%,44*##&("*#%,89%$&&7%+"$#%
*$41%"8%,44&(9,84*%)"$.%$.*#*%"8#$('4$"&8#>%
$,["83%"8$&%,44&'8$%$.*%)&(["83%4&89"$"&8#%
,89%$.*%)&([%$&%+*%/*(2&(5*91 Use of the

intended could result in a hazardous situation.

Page 4 ;&(%$*4.8"4,7%I'*#$"&8#>%/7*,#*%4,77%JKLLLKLMMKNOPO1 Item 56401
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<,$$*(D%$&&7%'#*%,89%4,(*
1. =*4.,(3*%&87D%)"$.%$.*%4.,(3*(%#/*4"2"*9%+D%
$.*%5,8'2,4$'(*(1 A charger that is suitable


2. ?#*%/&)*(%$&&7#%&87D%)"$.%#/*4"2"4,77D%
9*#"38,$*9%+,$$*(D%/,4[#1 Use of any other

3. F.*8%+,$$*(D%/,4[%"#%8&$%"8%'#*>%[**/%"$%,),D%
2(&5%&$.*(%5*$,7%&+^*4$#>%7"[*%/,/*(%47"/#>%
4&"8#>%[*D#>%8,"7#>%#4(*)#%&(%&$.*(%#5,77%5*$,7%
&+^*4$#>%$.,$%4,8%5,[*%,%4&88*4$"&8%2(&5%
&8*%$*(5"8,7%$&%,8&$.*(1 Shorting the battery
terminals together may cause burns or a fire.
4. ?89*(%,+'#"Z*%4&89"$"&8#>%7"I'"9%5,D%+*%
*^*4$*9%2(&5%$.*%+,$$*(D`%,Z&"9%4&8$,4$1%
U2%4&8$,4$%,44"9*8$,77D%&44'(#>%27'#.%)"$.%),$*(1%
U2%7"I'"9%4&8$,4$#%*D*#>%,99"$"&8,77D%#**[%
5*9"4,7%.*7/1%Liquid ejected from the
battery may cause irritation or burns.
H*(Z"4*
C,Z*%D&'(%/&)*(%$&&7%#*(Z"4*9%+D%,%I',7"2"*9%(*/,"(%/*(#&8%'#"83%&87D%"9*8$"4,7%(*/7,4*5*8$%/,($#1%%%

H,2*$D%F,(8"83#%G&55&8%2&(%E("89"83%S/*(,$"&8#
1. Q."#%/&)*(%$&&7%"#%"8$*89*9%$&%2'84$"&8%
,#%,%3("89*(1%=*,9%,77%#,2*$D%),(8"83#>%
"8#$('4$"&8#>%"77'#$(,$"&8#%,89%#/*4"2"4,$"&8#%
/(&Z"9*9%)"$.%$."#%/&)*(%$&&71%
Failure to follow all instructions listed below may
result in electric shock, fire and/or serious injury.
2. S/*(,$"&8#%#'4.%,#%#,89"83>%)"(*%+('#."83>%
/&7"#."83>%&(%4'$$"83K&22%,(*%8&$%(*4&55*89*9%
$&%+*%/*(2&(5*9%)"$.%$."#%/&)*(%$&&71%Operations
for which the power tool was not designed may
create a hazard and cause personal injury.
3. Y&%8&$%'#*%,44*##&("*#%)."4.%,(*%8&$%
#/*4"2"4,77D%9*#"38*9%,89%(*4&55*89*9%
+D%$.*%$&&7%5,8'2,4$'(*(1%Just because the


4. Q.*%(,$*9%#/**9%&2%$.*%,44*##&(D%5'#$%+*%,$%
7*,#$%*I',7%$&%$.*%5,]"5'5%#/**9%5,([*9%&8%
$.*%/&)*(%$&&71%Accessories running faster than

5. Q.*%&'$#"9*%9",5*$*(%,89%$.*%$."4[8*##%&2%D&'(%
,44*##&(D%5'#$%+*%)"$."8%$.*%4,/,4"$D%(,$"83%
&2%D&'(%/&)*(%$&&71%Incorrectly sized accessories
cannot be adequately guarded or controlled.
6. Q.*%,(+&(%#"a*%&2%).**7#>%27,83*#>%+,4["83%
/,9#%&(%,8D%&$.*(%,44*##&(D%5'#$%/(&/*(7D%
2"$%$.*%#/"897*%&2%$.*%/&)*(%$&&71%Accessories
with arbor holes that do not match the mounting


7. Y&%8&$%'#*%,%9,5,3*9%,44*##&(D1%
<*2&(*%*,4.%'#*%"8#/*4$%$.*%,44*##&(D%#'4.%
,#%,+(,#"Z*%).**7#%2&(%4."/#%,89%4(,4[#1%
U2%/&)*(%$&&7%&(%,44*##&(D%"#%9(&//*9>%
"8#/*4$%2&(%9,5,3*%&(%"8#$,77%,8%'89,5,3*9%
,44*##&(D1%B2$*(%"8#/*4$"83%,89%"8#$,77"83%,8%
,44*##&(D>%/&#"$"&8%D&'(#*72%,89%+D#$,89*(#%
,),D%2(&5%$.*%/7,8*%&2%$.*%(&$,$"83%,44*##&(D%
,89%('8%$.*%/&)*(%$&&7%,$%5,]"5'5%8&K7&,9%
#/**9%2&(%&8*%5"8'$*1%Damaged accessories

8. F*,(%/*(#&8,7%/(&$*4$"Z*%*I'"/5*8$1%Y*/*89"83%
&8%,//7"4,$"&8>%'#*%2,4*%#."*79>%#,2*$D%3&337*#%
&(%#,2*$D%37,##*#1%B#%,//(&/(",$*>%)*,(%9'#$%
5,#[>%.*,("83%/(&$*4$&(#>%37&Z*#%,89%)&([#.&/%
,/(&8%4,/,+7*%&2%#$&//"83%#5,77%,+(,#"Z*%&(%
)&([/"*4*%2(,35*8$#1%Q.*%*D*%/(&$*4$"&8%5'#$%
+*%4,/,+7*%&2%#$&//"83%27D"83%9*+("#%3*8*(,$*9%
+D%Z,("&'#%&/*(,$"&8#1




intensity noise may cause hearing loss.
9. \**/%+D#$,89*(#%,%#,2*%9"#$,84*%,),D%
2(&5%)&([%,(*,1%B8D&8*%*8$*("83%$.*%
)&([%,(*,%5'#$%)*,(%/*(#&8,7%/(&$*4$"Z*%
*I'"/5*8$1%
broken accessory may fly away and cause

10. C&79%/&)*(%$&&7%+D%"8#'7,$*9%3("//"83%#'(2,4*#%
&87D>%).*8%/*(2&(5"83%,8%&/*(,$"&8%).*(*%
$.*%,44*##&(D%5,D%4&8$,4$%."99*8%)"("83%
&(%"$#%&)8%4&(91%%An accessory contacting a



Page 5;&(%$*4.8"4,7%I'*#$"&8#>%/7*,#*%4,77%JKLLLKLMMKNOPO1Item 56401
HB;6QRST6=BQUSVWBUVQ6VBVG6 H6Q?T
11. V*Z*(%7,D%$.*%/&)*(%$&&7%9&)8%'8$"7%$.*%
,44*##&(D%.,#%4&5*%$&%,%4&5/7*$*%#$&/1%


12. Y&%8&$%('8%$.*%/&)*(%$&&7%)."7*%4,((D"83%
"$%,$%D&'(%#"9*1%Accidental contact with the


13. =*3'7,(7D%47*,8%$.*%/&)*(%$&&7_#%,"(%Z*8$#1%
The motor’s fan will draw the dust inside


14. Y&%8&$%&/*(,$*%$.*%/&)*(%$&&7%8*,(%27,55,+7*%
5,$*(",7#1%
15. Y&%8&$%'#*%,44*##&("*#%$.,$%(*I'"(*%7"I'"9%
4&&7,8$#1%Using water or other liquid coolants
may result in electrocution or shock.
16. Maintain labels and nameplates on the tool.
These carry important safety information.
If unreadable or missing, contact
Harbor Freight Tools for a replacement.
17. Avoid unintentional starting.
Prepare to begin work before turning on the tool.
18. Do not depress the spindle lock when
starting or during operation.
19. Do not leave the tool unattended when the
Battery Pack is connected. Turn off the tool,
and remove the Battery Pack before leaving.
20. Use clamps (not included) or other practical
ways to secure and support the workpiece to
a stable platform. Holding the work by hand
or against your body is unstable and may
lead to loss of control and personal injury.
21. 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",77D%,Z&"9%/7,4"83%$.*%4.,(3*(%&8%4,(/*$#%
,89%('3#`%$.*D%,(*%8&$%&87D%27,55,+7*>%+'$%$.*D%
,7#&%&+#$('4$%Z*8$#%'89*(%$.*%4.,(3*(1
22. This product is not a toy.
Keep it out of reach of children.
23. 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:
• Avoid operating alone.
• Do not use with power switch locked on.
• Properly maintain and inspect
to avoid electrical shock.
• Properly ground power cord. Ground Fault Circuit
Interrupter (GFCI) should also be implemented
– it prevents sustained electrical shock.
24. 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[+,4[%,89%=*7,$*9%F,(8"83#
Kickback is a sudden reaction to a pinched or
snagged rotating wheel, backing pad, brush
or any other accessory. Pinching or snagging
causes rapid stalling of the rotating accessory
which in turn causes the uncontrolled power
tool to be forced in the direction opposite of the
accessory’s rotation at the point of the binding.
For example, if an abrasive wheel is snagged or
pinched by the workpiece, the edge of the wheel that
is entering into the pinch point can dig into the surface
of the material causing the wheel to climb out or kick
out. The wheel may either jump toward or away from
the operator, depending on direction of the wheel’s
movement at the point of pinching. Abrasive wheels
may also break under these conditions.
Kickback is the result of power tool misuse and/or
incorrect operating procedures or conditions and can be
avoided by taking proper precautions as given below.
1. W,"8$,"8%,%2"(5%3("/%&8%$.*%/&)*(%$&&7%,89%
/&#"$"&8%D&'(%+&9D%,89%,(5%$&%,77&)%D&'%$&%
(*#"#$%["4[+,4[%2&(4*#1%B7),D#%'#*%,']"7",(D%
.,897*>%"2%/(&Z"9*9>%2&(%5,]"5'5%4&8$(&7%&Z*(%
["4[+,4[%&(%$&(I'*%(*,4$"&8%9'("83%#$,($K'/1


2. V*Z*(%/7,4*%D&'(%.,89%8*,(%$.*%
(&$,$"83%,44*##&(D1%Accessory may
kickback over your hand.
3. Y&%8&$%/&#"$"&8%D&'(%+&9D%"8%$.*%,(*,%).*(*%
/&)*(%$&&7%)"77%5&Z*%"2%["4[+,4[%&44'(#1%%



Page 6 ;&(%$*4.8"4,7%I'*#$"&8#>%/7*,#*%4,77%JKLLLKLMMKNOPO1 Item 56401
HB;6QR ST6=BQUSV WBUVQ6VBVG6H6Q?T
4. ?#*%#/*4",7%4,(*%).*8%)&(["83%4&(8*(#>%#.,(/%
*93*#%*$41%BZ&"9%+&'84"83%,89%#8,33"83%$.*%
,44*##&(D1
have a tendency to snag the rotating accessory
and cause loss of control or kickback.
5. Y&%8&$%,$$,4.%,%#,)%4.,"8%)&&94,(Z"83%
+7,9*%&(%$&&$.*9%#,)%+7,9*1%Such blades
create frequent kickback and loss of control.
H,2*$D%F,(8"83#%H/*4"2"4%2&(%E("89"83%,89%
B+(,#"Z*%G'$$"83K&22%S/*(,$"&8#
1. ?#*%&87D%).**7%$D/*#%$.,$%,(*%(*4&55*89*9%
2&(%D&'(%/&)*(%$&&7%,89%$.*%#/*4"2"4%
3',(9%9*#"38*9%2&(%$.*%#*7*4$*9%).**71%

cannot be adequately guarded and are unsafe.
2. Q.*%3',(9%5'#$%+*%#*4'(*7D%,$$,4.*9%
$&%$.*%/&)*(%$&&7%,89%/&#"$"&8*9%2&(%
5,]"5'5%#,2*$D>%#&%$.*%7*,#$%,5&'8$%&2%
).**7%"#%*]/&#*9%$&),(9#%$.*%&/*(,$&(1%

wheel fragments and accidental contact with wheel.
3. F.**7#%5'#$%+*%'#*9%&87D%2&(%(*4&55*89*9%
,//7"4,$"&8#1%;&(%*],5/7*-%9&%8&$%3("89%)"$.%
$.*%#"9*%&2%4'$K&22%).**71 Abrasive cut-off wheels


4. B7),D#%'#*%'89,5,3*9%).**7%27,83*#%
$.,$%,(*%&2%4&((*4$%#"a*%,89%#.,/*%2&(%D&'(%
#*7*4$*9%).**71%

breakage. Flanges for cut-off wheels may
be different from grinding wheel flanges.
5. Y&%8&$%'#*%)&(8%9&)8%).**7#%2(&5%7,(3*(%
/&)*(%$&&7#1%Wheel intended for larger


6. Y(*##%,//(&/(",$*7D1%Wear leather leggings
and fire resistant footwear during use. Do

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X"$."'5%<,$$*(D%H,2*$D%F,(8"83#
XUQCU?W%<BQQ6=U6H%HQS=6%B%
XB=E6%BWS?VQ%S;%6V6=ER%
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1. \**/%<,$$*(D%T,4[%9(D1%
2. YS%VSQ%YS%BVR%S;%QC6%;SXXSFUVE%
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a. S/*8>
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d. T'84$'(*>
e. U84"8*(,$*>%&(
f. 6]/&#*%$&%$*5/*(,$'(*#%3(*,$*(%$.,8%cMNd;1
3. Charge Battery Pack only according
to its Charger’s instructions.
4. Inspect Battery Pack before every use;
do not use or charge if damaged.
%HB!6%QC6H6%UVHQ=?GQUSVH1

Page 7;&(%$*4.8"4,7%I'*#$"&8#>%/7*,#*%4,77%JKLLLKLMMKNOPO1Item 56401
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G.*4[%)"$.%,%I',7"2"*9%*7*4$("4",8%"2%D&'%,(*%"8%9&'+$%,#%$&%).*$.*(%$.*%&'$7*$%"#%/(&/*(7D%
3(&'89*91%%Y&%8&$%5&9"2D%$.*%/&)*(%4&(9%/7'3%/(&Z"9*9%)"$.%$.*%$&&71%%V*Z*(%(*5&Z*%$.*%
3(&'89"83%/(&83%2(&5%$.*%/7'31%%Y&%8&$%'#*%$.*%$&&7%"2%$.*%/&)*(%4&(9%&(%/7'3%"#%9,5,3*91%%U2%9,5,3*9>%
.,Z*%"$%(*/,"(*9%+D%,%#*(Z"4*%2,4"7"$D%+*2&(*%'#*1%%U2%$.*%/7'3%)"77%8&$%2"$%$.*%&'$7*$>%.,Z*%,%/(&/*(%&'$7*$%
"8#$,77*9%+D%,%I',7"2"*9%*7*4$("4",81
Y&'+7*%U8#'7,$*9%Q&&7#-%Q&&7#%)"$.%Q)&%T(&83%T7'3#
S'$7*$#%2&(%cKT(&83%T7'3
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 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.
eH**%S'$7*$#%2&(%cKT(&83%T7'31f
6]$*8#"&8%G&(9#
V&$*- Extension cords must not be used with this item’s Charger.
HD5+&7&3D
Double Insulated
!Volts
gAlternating Current
Direct Current
BAmperes
n xxxx/min. Rated Revolutions per Minute (RPM)
WARNING marking concerning Risk
of Eye Injury. Wear ANSI-approved
safety goggles with side shields.
WARNING marking concerning Risk
of Respiratory Injury. Wear NIOSH-
approved breathing protection rated
for the hazards in your work area.
Read the manual before
set-up and/or use.
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.

Page 8 ;&(%$*4.8"4,7%I'*#$"&8#>%/7*,#*%4,77%JKLLLKLMMKNOPO1 Item 56401
HB;6QR ST6=BQUSV WBUVQ6VBVG6H6Q?T
H/*4"2"4,$"&8#
Battery Type Bauer 20V Li-ion:
64816 (sold separately)
Charger Type Bauer 20V Li-ion:
63947 (sold separately)
No Load Speed n0: 7000/min
Spindle Thread 5/8″ – 11 UNC
Wheel Diameter 4-1/2″
H*$'/%K%<*2&(*%?#*-
% =*,9%$.*%6VQU=6%UWTS=QBVQ%HB;6QR%UV;S=WBQUSV%#*4$"&8%,$%$.*%+*3"88"83%&2%$."#%
5,8',7%"847'9"83%,77%$*]$%'89*(%#'+.*,9"83#%$.*(*"8%+*2&(*%#*$%'/%&(%'#*%&2%$."#%/(&9'4$1
QS%T=6!6VQ%H6=US?H%UVh?=R%;=SW%BGGUY6VQBX%ST6=BQUSV-%
W,[*%#'(*%$.,$%$.*%Q("33*(%H)"$4.%"#%"8%$.*%&22K/&#"$"&8%,89%(*5&Z*%$.*%
<,$$*(D%T,4[%+*2&(*%/*(2&(5"83%,8D%/(&4*9'(*%"8%$."#%#*4$"&81
U8#$,77"83%$.*%F.**7%E',(9
QS%T=6!6VQ%H6=US?H%UVh?=R-%%Y&%8&$%&/*(,$*%$."#%$&&7%)"$.&'$%$.*%F.**7%E',(9%/(&/*(7D%"8#$,77*91
1. Pull the Clamp Handle out, away from the
Grinder, to unlock and loosen the Wheel Guard.
2. Slide the collar of the Wheel Guard
over the rim of the Gear Housing.
3. Rotate the Wheel Guard as needed to
shield you during the planned work.
4. Once positioned, push to close and
lock the Clamp Handle in place.
5. Check the Wheel Guard to ensure
it is firmly in place. Adjust if
necessary before proceeding.
F.**7%E',(9
G7,5/%C,897*

Page 9;&(%$*4.8"4,7%I'*#$"&8#>%/7*,#*%4,77%JKLLLKLMMKNOPO1Item 56401
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QS%T=6!6VQ%H6=US?H%UVh?=R-%
Y&%8&$%&/*(,$*%$."#%$&&7%)"$.%&8*%.,89%&87D%&(%)"$.&'$%$.*%B']"7",(D%C,897*%/(&/*(7D%"8#$,77*91
1. The Auxiliary Handle may be installed
in one of two positions, on either
side of the Gear Housing.
2. Screw the threaded end of the
Auxiliary Handle into the selected position.
Tighten securely before beginning work.
B']"7",(D%C,897*%T&#"$"&8#
;'84$"&8#
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Page 10 ;&(%$*4.8"4,7%I'*#$"&8#>%/7*,#*%4,77%JKLLLKLMMKNOPO1 Item 56401
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5,8',7%"847'9"83%,77%$*]$%'89*(%#'+.*,9"83#%$.*(*"8%+*2&(*%#*$%'/%&(%'#*%&2%$."#%/(&9'4$1
Q&&7%H*$%?/
QS%T=6!6VQ%H6=US?H%UVh?=R%;=SW%BGGUY6VQBX%ST6=BQUSV-%
W,[*%#'(*%$.,$%$.*%Q("33*(%H)"$4.%"#%"8%$.*%&22K/&#"$"&8%,89%(*5&Z*%$.*%
<,$$*(D%T,4[%+*2&(*%/*(2&(5"83%,8D%/(&4*9'(*%"8%$."#%#*4$"&81
U8#$,77"83%,%V&8K$.(*,9*9%E("89"83%F.**7
1. The Grinding Wheel (sold separately) MUST be:
• rated to at least 7,000 RPM
• 4-1/2″(115 mm) in diameter
• fitted with a 7/8″round arbor hole
• 1/4" (6mm) thick or less
• suitable for surface grinding, not edge grinding
• dry and clean
• proven undamaged by inspection
2. Press in and hold the Spindle Lock Button
to prevent the Spindle from turning.
3. Remove the Outer Flange.
Keep the Inner Flange in
position on the Spindle.
4. Closely inspect the Grinding
Wheel before mounting.
FB=VUVEi%QS%T=6!6VQ%H6=US?H%UVh?=R-%
Do not use worn or damaged wheels.
5. Place the Grinding Wheel onto the Spindle.
V&$*- The Outer Flange has a step for improved
stability with thick accessories. Keep this step
on the inside for thick accessories. To allow
proper clamping for thin accessories, flip Outer
Flange so this step is on the outside.
6. Thread the Outer Flange onto the Spindle.
Wrench tighten only enough so that the wheel is
securely held on the spindle.
FB=VUVE-%%Q&%/(*Z*8$%#*("&'#%"8^'(D>%
9&%8&$%&Z*($"3.$*8%27,83*1%%SZ*($"3.$*8"83%4,8%
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Page 11;&(%$*4.8"4,7%I'*#$"&8#>%/7*,#*%4,77%JKLLLKLMMKNOPO1Item 56401
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U8#$,77"83%,%Q.(*,9*9%B44*##&(D
1. The accessory MUST be:
• rated to at least 7,000 RPM
• 4-1/2″(115 mm) in diameter
• fitted with a threaded opening of 5/8″ – 11 UNC
• undamaged
• a grinding wheel suitable for surface grinding,
not edge grinding (accessories not included).
2. Press in and hold the Spindle Lock Button
to prevent the Spindle from turning.
3. Remove the Outer Flange and Inner
Flange and keep in a safe place.
4. Thread disc accessory onto the Spindle.
Wrench tighten onto the Spindle.
<,$$*(D%G.,(3"83
Charge battery pack before using this tool. Follow instructions included
with battery charger. Battery Pack and Charger sold separately.
U8#$,77"83%$.*%<,$$*(D%T,4[
V&$*- Battery Pack sold separately.
1. With the Trigger Switch in the “OFF” position,
insert a fully charged battery pack into the
Battery Receptacle until it clicks in place.
2. Q&%(*5&Z*, push the latch on the
battery back and slide it out.
X,$4.
<,$$*(D%T,4[
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=*4*/$,47*
F&([/"*4*%,89%F&([%B(*,%H*$%?/
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.
2. Secure loose workpieces using a vise or clamps
(not included) to prevent movement while working.
3. There must not be hazardous objects, such
as utility lines or foreign objects, nearby
that will present a hazard while working.
4. You must use personal safety equipment including,
but not limited to, ANSI-approved eye and hearing
protection, as well as heavy-duty work gloves.
5. Before beginning work, provide for sparks
and debris that will fly off the work surface.

Page 12 ;&(%$*4.8"4,7%I'*#$"&8#>%/7*,#*%4,77%JKLLLKLMMKNOPO1 Item 56401
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QS%T=6!6VQ%H6=US?H%UVh?=R-%%E("/%$.*%$&&7%2"(57D%"8%+&$.%.,89#1
1. Make sure that the Trigger Switch is in the
“OFF” position, then connect the battery pack.
2. Place one hand on the motor housing and the
other on the side handle before starting the tool.
3. Start the tool by pressing the Trigger Switch
down and then forward until it locks in place.
4. Allow the tool to come up to full speed
before touching the work material.
5. Apply the wheel to the work material at a 10°– 15°
angle, allowing the tool to operate at full speed.
If the tool bogs down, use lighter pressure.
6. To create a smoother surface,
keep the tool moving over the work surface.
7. QS%T=6!6VQ%BGGUY6VQH>%B;Q6=%?H6-%
Turn off the tool by pushing the
Trigger Switch backward.
FB=VUVEi%%QS%T=6!6VQ%H6=US?H%UVh?=R-%%B77&)%
$.*%$&&7%$&%4&5*%$&%,%4&5/7*$*%#$&/%+*2&(*%#*$$"83%
"$%9&)81
Remove the tool’s Battery Pack. Clean, then
store the tool indoors out of children’s reach.

Page 13;&(%$*4.8"4,7%I'*#$"&8#>%/7*,#*%4,77%JKLLLKLMMKNOPO1Item 56401
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%T(&4*9'(*#%8&$%#/*4"2"4,77D%*]/7,"8*9%"8%$."#%5,8',7%5'#$%
+*%/*(2&(5*9%&87D%+D%,%I',7"2"*9%$*4.8"4",81
QS%T=6!6VQ%H6=US?H%UVh?=R%;=SW%BGGUY6VQBX%ST6=BQUSV-%
W,[*%#'(*%$.,$%$.*%Q("33*(%H)"$4.%"#%"8%$.*%&22K/&#"$"&8%,89%(*5&Z*%"$#%
<,$$*(D%T,4[%+*2&(*%/*(2&(5"83%,8D%/(&4*9'(*%"8%$."#%#*4$"&81
QS%T=6!6VQ%H6=US?H%UVh?=R%;=SW%QSSX%;BUX?=6-%
Y&%8&$%'#*%9,5,3*9%*I'"/5*8$1%%U2%,+8&(5,7%8&"#*%&(%Z"+(,$"&8%&44'(#>%
.,Z*%$.*%/(&+7*5%4&((*4$*9%+*2&(*%2'($.*(%'#*1
G7*,8"83>%W,"8$*8,84*>%,89%X'+("4,$"&8
1. <6;S=6%6BGC%?H6> inspect the general
condition of the tool. Check for:
• leaking, swollen, or cracked battery pack
• loose hardware
• misalignment or binding of moving parts
• cracked or broken parts
• damaged electrical wiring
• any other condition that may
affect its safe operation.
2. B;Q6=%?H6> wipe external surfaces
of the tool with clean cloth.
3. Disconnect battery pack and store battery pack,
charger, and tool in dry, indoor area out of
reach of children and away from metal objects
(i.e., paperclips, coins) to prevent shorting.
4. X"KU&8%<BQQ6=R%W?HQ%<6%=6GRGX6Y%S=%
YUHTSH6Y%S;%T=ST6=XR1
Do not short, incinerate or open battery.
5. Periodically, wear ANSI-approved safety goggles
and NIOSH-approved breathing protection
and blow dust and grit out of the motor
vents using dry compressed air.
B44*##&(D%H$&(,3*%,89%C,897"83
1. Handle accessories carefully to prevent
dropping or bumping. Do not use wheels
that have been dropped or bumped.
2. Store accessories in shelves, racks, boxes,
or drawers. Keep storage area dry and
above freezing. Any grinding or cut-off
wheels exposed to humidity or freezing
temperatures must not be used.

Page 14 ;&(%$*4.8"4,7%I'*#$"&8#>%/7*,#*%4,77%JKLLLKLMMKNOPO1 Item 56401
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Q(&'+7*#.&&$"83
T(&+7*5 T&##"+7*%G,'#*# X"[*7D%H&7'$"&8#
Tool will not start. 1. Battery Pack not properly connected.
2. Battery Pack not properly charged.
3. Battery Pack stopped working.
4. Tool’s thermal reset
breaker tripped (if equipped).
5. Internal damage or wear. (Carbon
brushes or power switch, for example.)
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. Turn off tool and allow to cool.
Press reset button on tool.
5. Have technician service tool.
Tool operates slowly. 1. Excess pressure applied to workpiece.
2. Battery Pack power low.
3. Battery Pack wearing out.
1. Decrease pressure, allow
tool to do the work.
2. Recharge Battery Pack.
3. Dispose of old Battery Pack
properly or recycle. Replace Battery Pack.
Performance
decreases over time.
1. Carbon brushes worn or damaged.
2. Battery Pack wearing out.
1. Have qualified technician replace brushes.
2. Battery Pack capacity will gradually
decrease through use. If symptoms
are severe, recycle old Battery Pack
(or dispose of properly) and replace it.
Excessive noise
or rattling.
Internal damage or wear.
(Carbon brushes or bearings, for example.)
Have technician service tool.
Overheating. 1. Forcing tool to work too fast.
2. Blocked motor housing vents.
1. Allow tool to work at its own rate.
2. Wear ANSI-approved safety goggles
and NIOSH-approved dust mask/
respirator while blowing dust out of
motor using compressed air.
Tool does not
grind effectively.
1. Accessory loose.
2. Accessory damaged, worn or
wrong type for the material.
1. Confirm accessory arbor is correct
and Outer Flange/Arbor Nut is tight.
2. Check condition and type of disc accessory.
Use only proper type of disc
accessory in good condition.
% ;&77&)%,77%#,2*$D%/(*4,'$"&8#%).*8*Z*(%9",38&#"83%&(%#*(Z"4"83%
$.*%$&&71%%Y"#4&88*4$%/&)*(%#'//7D%+*2&(*%#*(Z"4*1

Page 15;&(%$*4.8"4,7%I'*#$"&8#>%/7*,#*%4,77%JKLLLKLMMKNOPO1Item 56401
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=*4&(9%T(&9'4$_#%H*(",7%V'5+*(%C*(*-%
V&$*- If product has no serial number, record month and year of purchase instead.
V&$*- Replacement parts are not available for this item. Refer to UPC 193175465269.

cMMOO%B3&'(,%=&,9%%j%%G,7,+,#,#>%GB%PJ@Ac%%j%%JKLLLKLMMKNOPO
X"5"$*9%PA%Y,D%F,((,8$D
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.