Bauer 21507-BR Assembly instructions
Visit our website at: http://www.harborfreight.com
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. 21i
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 ma y n o t b e i n c l u d e d .
Read this material before using this product.
Failure to do so can result in serious injury.
SAVE THIS MANUAL.
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Table of Contents
Safety ......................................................... 2
Specifications ............................................. 7
Setup .......................................................... 8
Operation................................................... 10
Maintenance.............................................. 12
Parts List and Diagram.............................. 14
Warranty .................................................... 16
WARNING SYMBOLS AND DEFINITIONS
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.
IMPORTANT SAFETY INFORMATION
General Power Tool Safety Warnings
Read all safety warnings, instructions, illustrations and specifications provided with this power tool.
Failure to follow all instructions listed below may result in electric shock, fire 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.
1. Work area safety
a. Keep work area clean and well lit.
Cluttered or dark areas invite accidents.
b. Do not operate power tools in explosive
atmospheres, such as in the presence of
flammable liquids, gases or dust. Power tools
create sparks which may ignite the dust or fumes.
c. Keep children and bystanders away
while operating a power tool. Distractions
can cause you to lose control.
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SAFETYOPERATIONMAINTENANCE SETUP
2. Electrical safety
a. Avoid body contact with earthed or
grounded surfaces, such as pipes,
radiators, ranges and refrigerators.
There is an increased risk of electric shock
if your body is earthed or grounded.
b. Do not expose power tools to rain or wet
conditions. Water entering a power tool
will increase the risk of electric shock.
3. Personal safety
a. Stay alert, watch what you are doing and
use common sense when operating a
power tool. Do not use a power tool while
you are tired or under the influence of
drugs, alcohol or medication. A moment
of inattention while operating power tools
may result in serious personal injury.
b. Use personal protective equipment. Always
wear eye protection. Protective equipment
such as dust mask, non-skid safety shoes, hard
hat, or hearing protection used for appropriate
conditions will reduce personal injuries.
c. Prevent unintentional starting. Ensure the
switch is in the off-position before connecting
to power source and/or battery pack, picking
up or carrying the tool. Carrying power tools
with your finger on the switch or energizing power
tools that have the switch on invites accidents.
d. Remove any adjusting key or wrench
before turning the power tool on. A wrench
or a key left attached to a rotating part of the
power tool may result in personal injury.
e. Do not overreach. Keep proper footing and
balance at all times. This enables better control
of the power tool in unexpected situations.
f. Dress properly. Do not wear loose clothing
or jewelry. Keep your hair, clothing
and gloves away from moving parts.
Loose clothes, jewelry or long hair
can be caught in moving parts.
g. If devices are provided for the connection
of dust extraction and collection
facilities, ensure these are connected
and properly used. Use of dust collection
can reduce dust-related hazards.
h. Do not let familiarity gained from frequent
use of tools allow you to become
complacent and ignore tool safety
principles. 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 leave the tool unattended when the
Battery Pack is connected. Turn off the tool,
and remove the Battery Pack before leaving.
k. This product is not a toy.
Keep it out of reach of children.
l. 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.
m. 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. Power tool use and care
a. Do not force the power tool. Use the correct
power tool for your application. The correct
power tool will do the job better and safer
at the rate for which it was designed.
b. Do not use the power tool if the switch
does not turn it on and off. Any power
tool that cannot be controlled with the switch
is dangerous and must be repaired.
c. Disconnect the plug from the power
source and/or remove the battery pack,
if detachable, 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.
d. Store idle power tools out of the reach of
children and do not allow persons unfamiliar
with the power tool or these instructions
to operate the power tool. Power tools are
dangerous in the hands of untrained users.
e. Maintain power tools and accessories.
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.
f. Keep cutting tools sharp and clean. Properly
maintained cutting tools with sharp cutting edges
are less likely to bind and are easier to control.
g. Use the power tool, accessories and tool bits
etc. in accordance with these instructions,
taking into account the working conditions
and the work to be performed. Use of the
power tool for operations different from those
intended could result in a hazardous situation.
h. Keep handles and grasping surfaces
dry, clean and free from oil and grease.
Slippery handles and grasping surfaces
do not allow for safe handling and control
of the tool in unexpected situations.
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SAFETY OPERATION MAINTENANCESETUP
5. Service
a. Have your power tool serviced by a
qualified repair person using only identical
replacement parts. This will ensure that
the safety of the power tool is maintained.
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. Mixer safety instructions
a. Hold the tool with both hands at the
intended handles. Loss of control
can cause personal injury.
b. Ensure sufficient ventilation when
mixing flammable materials to avoid
a hazardous atmosphere. Developing
vapor may be inhaled or be ignited by
the sparks the power tool produces.
c. Do not mix food. Power tools and their
accessories are not designed for processing food.
d. Keep the cord away from the working area.
The cord may be entangled by the mixer basket.
e. Ensure that the mixing container is placed in
a firm and secure position. A container that is
not properly secured may move unexpectedly.
f. Ensure that no liquid splashes against
the housing of the power tool. Liquid that
has penetrated the power tool can cause
damage and lead to electric shock.
g. Follow the instructions and warnings
for the material to be mixed. Material
to be mixed may be harmful.
h. If the power tool falls into the material to
be mixed, unplug the tool Immediately and
have the power tool checked by a qualified
repair person. Reaching into the bucket with the
tool still plugged in can lead to electric shock.
i. Do not reach Into the mixing container
with your hands or insert any other objects
into it while mixing. Contact with the mixer
basket may lead to serious personal injury.
j. Start up and run down the tool In the
mixing container only. The mixer basket may
bend or spin in an uncontrolled manner.
7. Battery tool use and care
a. Prevent unintentional starting. 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. Disconnect the battery pack from the
power tool before making any adjustments,
changing accessories, or storing power
tool. Such preventive safety measures reduce
the risk of starting the power tool accidentally.
c. Recharge only with the charger specified by
the manufacturer. A charger that is suitable
for one type of battery pack may create a risk
of fire when used with another battery pack.
d. Use power tools only with specifically
designated battery packs. Use of any other
battery packs may create a risk of injury and fire.
e. When battery pack is not in use, keep it away
from other metal objects, like paper clips,
coins, keys, nails, screws or other small metal
objects, that can make a connection from
one terminal to another. Shorting the battery
terminals together may cause burns or a fire.
f. Under abusive conditions, liquid may be
ejected from the battery; avoid contact.
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. Do not use a battery pack or power tool that
is damaged or modified. Damaged or modified
batteries may exhibit unpredictable behavior
resulting in fire, explosion or risk of injury.
h. Do not expose a battery pack or power
tool to fire or excessive temperature.
Exposure to fire or temperature above
265°F may cause explosion.
i. Follow all charging instructions and do
not charge the battery pack or power tool
outside of the temperature range specified
in the instructions. Charging improperly or at
temperatures outside of the specified range may
damage the battery and increase the risk of fire.
j. Have servicing performed by a qualified
repair person using only identical
replacement parts. This will ensure that
the safety of the product is maintained.
k. Do not modify or attempt to repair the power
tool or the battery pack except as indicated
in the instructions for use and care.
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. Especially avoid
placing the Charger on carpets and rugs; they
are not only flammable, but they also obstruct
vents under the Charger. 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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SAFETYOPERATIONMAINTENANCE SETUP
8. Lithium Battery Safety Warnings
LITHIUM BATTERIES STORE
A LARGE AMOUNT OF ENERGY AND
WILL VENT FIRE OR EXPLODE
IF MISTREATED:
a. Keep Battery Pack dry.
b. DO NOT DO ANY OF THE FOLLOWING
TO THE BATTERY PACK:
• Open,
• Drop,
• Short-circuit,
• Puncture,
• Incinerate, or
• Expose to temperatures greater than 265°F.
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.
Grounding
TO PREVENT ELECTRIC SHOCK AND DEATH FROM INCORRECT GROUNDING:
Check with a qualified electrician if you are in doubt as to whether the outlet is properly
grounded. Do not modify the power cord plug provided with the charger. Do not use the charger
if the power cord or plug is damaged. If damaged, have it repaired by a service facility before
use. If the plug will not fit the outlet, have a proper outlet installed by a qualified electrician.
Extension Cords
Note: Extension cords must not be used with this item’s Charger.
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SAFETY OPERATION MAINTENANCESETUP
Symbology
Double Insulated
VVolts
~Alternating Current
AAmperes
n0xxxx/min. 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.
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.
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SAFETYOPERATIONMAINTENANCE SETUP
Specifications
Battery Pack Bauer 20V Li-Ion 64816 (sold separately)
Charger Bauer 20V Li-Ion 63947 (sold separately)
Battery Type Li-ion
No Load Spread n0: 0-420/0-720/min
Chuck Size 1/2″(Ø13mm)
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SAFETY OPERATION MAINTENANCESETUP
Setup - Before Use:
Read the ENTIRE IMPORTANT SAFETY INFORMATION section at the beginning of this
manual including all text under subheadings therein before set up or use of this product.
Note: For additional information regarding the parts listed in the
following pages, refer to Parts List and Diagram on page 14.
Attach Mixing Paddle
1. Insert Mixing Paddle (not included) into Drill Chuck.
2. Insert Chuck Key into the Chuck and
turn clockwise to tighten securely.
3. To remove Mixing Paddle, proceed in reverse order.
Power Supply Requirements
Use 20VDC Battery Pack.
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SAFETYOPERATIONMAINTENANCE SETUP
Functions
Speed Dial
Lock-off Button
Chuck
Gear Switch
Trigger
Handle
Handle
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SAFETY OPERATION MAINTENANCESETUP
Operating Instructions
Read the ENTIRE IMPORTANT SAFETY INFORMATION section at the beginning of this
manual including all text under subheadings therein before set up or use of this product.
Tool Set Up
TO PREVENT SERIOUS INJURY FROM ACCIDENTAL OPERATION:
Make sure that the Trigger is in the off-position and unplug battery from
tool before performing any procedure in this section.
Battery Charging
Charge battery after unpacking and before using this tool. Follow
instructions included with battery charger (sold separately).
Setting the Gear
1. Select an operating speed depending
on the material being mixed.
a. Use Gear 1 for heavy materials
and when beginning to mix.
b. Use Gear 2 for lighter materials, and as the
material becomes smoother after partial mixing.
Gear Switch
Adjusting the Speed
Turn the Speed Dial on the Handle from 1 (lowest) to Max (highest).
Work Area Set Up
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. There must not be objects, such as utility lines,
nearby that will present a hazard while working.
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SAFETYOPERATIONMAINTENANCE SETUP
General Instructions for Use
Operation
WARNING! TO PREVENT SERIOUS INJURY: Release
trigger if tools shut down. Press Trigger again to restart.
1. Make sure Trigger is in off-position,
then attach Battery Pack.
2. Place a bucket (not included) on a flat, level surface.
NOTE: Refer to the material manufacturer’s
instructions for proper mixing instructions.
3. Pour the material into the bucket.
4. Set Gear and Speed.
5. Hold onto grips of both Handles
without engaging Trigger.
6. Put Mixing Paddle into bucket.
7. Push Lock-off Button, then squeeze
trigger to start tool.
Note: Tool will not start unless Lock-off Button
is pressed before squeezing Trigger. Do not
overload tool. If tool bogs down, release Trigger.
8. When material has been mixed, release Trigger.
Wait for tool to come to a complete stop and
remove Mixing Paddle from material.
Cleaning
1. Immediately after use, clean the Mixing Paddle.
a. If material is water-based, fill clean
bucket with water, put Mixing Paddle
into bucket and squeeze Trigger.
b. If material is oil-based, wipe off Mixing Paddle
with a clean towel, then wipe off with a clean
cloth moistened with mineral spirits.
2. Dry the Mixing Paddle with a clean cloth.
3. To prevent accidents, turn off the tool and
remove its Battery Pack after use.
4. Spray the paddle with light oil to prevent
rust while in storage, then store the tool
indoors out of children’s reach.
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SAFETY OPERATION MAINTENANCESETUP
Maintenance and Servicing Instructions
Procedures not specifically explained in this manual must
be performed only by a qualified technician.
TO PREVENT SERIOUS INJURY FROM ACCIDENTAL OPERATION:
Make sure that the Trigger is in the off-position and remove its Battery
Pack before performing any procedure in this section.
TO PREVENT SERIOUS INJURY FROM TOOL FAILURE:
Do not use damaged equipment. If abnormal noise or vibration
occurs, have the problem corrected before further use.
Cleaning, Maintenance, and Lubrication
1. BEFORE EACH USE, 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, and
• any other condition that may
affect its safe operation.
2. IMMEDIATELY AFTER USE, clean the
Mixing Paddle according to Cleaning on
page 11. Spray the paddle with light oil
to prevent rust while in storage. Then store
the tool indoors out of children’s reach.
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.
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SAFETYOPERATIONMAINTENANCE SETUP
Troubleshooting
Problem Possible Causes Likely Solutions
Tool will not start. 1. Battery Pack not properly
connected.
2. Battery Pack not properly
charged.
3. Battery Pack burnt-out.
4. Internal damage or wear.
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.
Mixing Paddle
wobbles.
Chuck loose. Tighten the Chuck.
Unsatisfactory
mixing results.
Tool speed too fast or too slow. Check with material manufacturer’s recommendations
for proper mixing speed. Then adjust Gear Switch
and/or Speed Dial to proper tool mixing speed.
Tool operates slowly. Material too thick. Thin out material.
Excessive noise
or rattling.
Internal damage or wear. 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.
Follow all safety precautions whenever diagnosing or servicing the tool.
Disconnect Battery Pack and Charger power supply before service.
Page 14 For technical questions, please call 1-888-866-5797. Item 58152
SAFETY OPERATION MAINTENANCESETUP
Parts List and Diagram
PLEASE READ THE 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.
Parts List
Part Description Qty
1 Output Shaft 1
2 Key 1
3 Oil Seal 1
4 Screw ST5×50 4
5 Head Housing 1
6 Screw ST3×12 1
7 Gear Switch 1
8 Spring 1
9 Steel Ball 1
10 Bearing 6002z22RS 1
11 Shaft Ring Ø32 1
12 Big Gear 1
13 Shaft Ring Ø13 1
14 Needle Bearing HK0810 2
15 Needle Bearing HK1010 2
16 Counter Drive Shaft 1
17 Two Gang Gear 1
18 Shift Dial 1
19 Shift Fork A 1
20 Shift Fork Spring 2
21 Gear Guide 1
22 Shift Fork B 1
23 Main Driving Shaft 1
24 Diagonal Gear 1
25 608 Bearing 1
26 Gasket 1
27 Middle Cover 1
28 O Ring 1
29 Rotor Spring 1
Part Description Qty
30 Seal Pad 1
31 609RS Bearing 1
32 Screw ST4×12-F 7
33 Fan Shroud 1
34 Brushless Rotor 1
35 Bearing Sleeve 607 1
36 Brushless Stator 1
37 Screw ST4×16-F 12
38 Housing 1
39 Brushless Controller 1
40 Speed Controller 1
41 Screw ST4×12 2
42 Chuck 1
43 Right Bottom Handle 1
44 Left Bottom Handle 1
45 Trigger 1
46 Spring Ø0.8 2
47 Lock-off Button 1
48 Microswitch 1
49 Handle Frame 1
50 Switch Base 1
51 Right Top Handle 1
52 Left Top Handle 1
53 Contact Plate Holder Press Plate 1
54 Battery Pack Plug-In 1
55 Back Cover 1
56 Chuck Key 1
57 Key Sleeve 1
58 Screw 5×25 1
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. Specify UPC 193175432971 when ordering parts.
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SAFETYOPERATIONMAINTENANCE SETUP
Assembly Diagram
26541 Agoura Road • Calabasas, CA 91302 • 1-888-866-5797
Limited 90 Day Warranty
Harbor Freight Tools Co. makes every effort to assure that its products meet high quality and durability standards,
and warrants to the original purchaser that this product is free from defects in materials and workmanship for the
period of 90 days from the date of purchase. This warranty does not apply to damage due directly or indirectly,
to misuse, abuse, negligence or accidents, repairs or alterations outside our facilities, criminal activity, improper
installation, normal wear and tear, or to lack of maintenance. We shall in no event be liable for death, injuries
to persons or property, or for incidental, contingent, special or consequential damages arising from the use of
our product. Some states do not allow the exclusion or limitation of incidental or consequential damages, so the
above limitation of exclusion may not apply to you. THIS WARRANTY IS EXPRESSLY IN LIEU OF ALL OTHER
WARRANTIES, EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS.
To take advantage of this warranty, the product or part must be returned to us with transportation charges
prepaid. Proof of purchase date and an explanation of the complaint must accompany the merchandise.
If our inspection verifies the defect, we will either repair or replace the product at our election or we may
elect to refund the purchase price if we cannot readily and quickly provide you with a replacement. We will
return repaired products at our expense, but if we determine there is no defect, or that the defect resulted
from causes not within the scope of our warranty, then you must bear the cost of returning the product.
This warranty gives you specific legal rights and you may also have other rights which vary from state to state.
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