BAUER 58308 20V Brushless Cordless 4-1/2 Inch Angle Grinder Owner’s Manual

58308 20V Brushless Cordless 4-1/2 Inch Angle Grinder

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

For Best Results, Use 3.0 Amp Hour Battery or Greater (Sold Separately)

Visit our website at: http://www.harborfreight.com Email our technical support at: productsupport@harborfreight.com

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.

Table of Contents

Safety ………………………………………………… 2 Specifications …………………………………….. 10 Setup ………………………………………………… 11 Operation…………………………………………… 13

Maintenance ………………………………………. 16 Parts List and Diagram ………………………… 18 Warranty ……………………………………………. 20

SAFETY

SETUP

OPERATION

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 and instructions. Failure to follow the warnings and instructions may result in electric shock, fire and/or serious injury. Save all warnings and instructions for future reference. 7KHWHUPSRZHUWRROLQWKHZDUQLQJVUHIHUVWRRXUEDWWHURSHUDWHGFRUGOHVVSRZHUWRRO

Work Area Safety
1. Keep work area clean and well lit. Cluttered or dark areas invite accidents.
2. Do not operate power tools in explosive atmospheres, such as in the presence of flammable liquids, gases or dust. Power tools FUHDWHVSDUNVZKLFKPDLJQLWHWKHGXVWRUIXPHV

3. Keep children and bystanders away while operating a power tool. Distractions can cause you to lose control.

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SAFETY

SETUP

Electrical Safety
Do not expose power tools to rain or wet conditions. :DWHUHQWHULQJDSRZHUWRROZLOOLQFUHDVHWKHULVNRIHOHFWULFVKRFN
Personal Safety

1. 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 RILQDWWHQWLRQZKLOHRSHUDWLQJSRZHUWRROV PDUHVXOWLQVHULRXVSHUVRQDOLQMXU
2. Use safety equipment. Always wear eye protection.6DIHWHTXLSPHQWVXFKDV dust mask, non-skid safety shoes, hard hat, RUKHDULQJSURWHFWLRQXVHGIRUDSSURSULDWH FRQGLWLRQVZLOOUHGXFHSHUVRQDOLQMXULHV
3. Prevent unintentional starting. Ensure the switch/trigger is in the off- position before connecting to power source and/ or battery pack, picking up or carrying the tool.&DUULQJSRZHUWRROVZLWKRXUILQJHU RQWKHVZLWFKRUHQHUJL]LQJSRZHUWRROVWKDW have the switch on invites accidents.
Power Tool Use and Care

4. Remove any adjusting key or wrench before turning the power tool on. $ZUHQFKRUDNHOHIWDWWDFKHGWRDURWDWLQJSDUW RIWKHSRZHUWRROPDUHVXOWLQSHUVRQDOLQMXU
5. Do not overreach. Keep proper footing and balance at all times. This enables better control RIWKHSRZHUWRROLQXQH[SHFWHGVLWXDWLRQV
6. Dress properly. Do not wear loose clothing or jewelry. Keep your hair, clothing and gloves away from moving parts. Loose clothes, jewelry RUORQJKDLUFDQEHFDXJKWLQPRYLQJSDUWV
7. If devices are provided for the connection of dust extraction and collection facilities, ensure these are connected and properly used. Use of these devices can reduce dust-related hazards.
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.

1. Do not force the power tool. Use the correct power tool for your application. 7KHFRUUHFWSRZHUWRROZLOOGRWKHMREEHWWHUDQG safer at the rate for which it was designed.
2. Do not use the power tool if the switch/trigger does not turn it on and off. $QSRZHUWRROWKDWFDQQRWEHFRQWUROOHGZLWKWKH VZLWFKWULJJHULVGDQJHURXVDQGPXVWEHUHSDLUHG
3. Disconnect the battery pack from the power tool before making any adjustments, changing accessories, or storing power tools. 6XFKSUHYHQWLYHVDIHWPHDVXUHVUHGXFH WKHULVNRIVWDUWLQJWKHSRZHUWRRODFFLGHQWDOO

4. 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.
5. Maintain power tools. Check for misalignment or binding of moving parts, breakage of parts and any other condition that may affect the power tool’s operation. If damaged, have the power tool repaired before use. Many accidents DUHFDXVHGESRRUOPDLQWDLQHGSRZHUWRROV
6. 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 SRZHUWRROIRURSHUDWLRQVGLIIHUHQWIURPWKRVH intended could result in a hazardous situation.

OPERATION

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SAFETY

SETUP

Battery tool use and care

1. Recharge only with the charger specified by the manufacturer. A charger that is suitable IRURQHWSHRIEDWWHUSDFNPDFUHDWHDULVN RIILUHZKHQXVHGZLWKDQRWKHUEDWWHUSDFN
2. Use power tools only with specifically designated battery packs. Use of any other EDWWHUSDFNVPDFUHDWHDULVNRILQMXUDQGILUH

3. 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.
4. 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.

Service
Have your power tool serviced by a qualified repair person using only identical replacement parts. 7KLVZLOOHQVXUHWKDWWKHVDIHWRIWKHSRZHUWRROLVPDLQWDLQHG

Safety Warnings Common for Grinding, Sanding, or Wire Brushing Operations

1. This power tool is intended to function as a grinder, sander, or wire brush. 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.
2. Operations such as polishing or cuttingoff are not recommended to be performed with this power tool. Operations for which the power tool was not designed may create a hazard and cause personal injury.
3. Do not use accessories which are not specifically designed and recommended by the tool manufacturer. Just because the DFFHVVRUFDQEHDWWDFKHGWRRXUSRZHUWRRO LWGRHVQRWDVVXUHVDIHRSHUDWLRQ
4. The rated speed of the accessory must be at least equal to the maximum speed marked on the power tool. Accessories running faster than WKHLU5$7(’63((‘FDQEUHDNDQGIODSDUW
5. The outside diameter and the thickness of your accessory must be within the capacity rating of your power tool. Incorrectly sized accessories cannot be adequately guarded or controlled.
6. The arbor size of wheels, flanges, backing pads or any other accessory must properly fit the spindle of the power tool. Accessories with arbor holes that do not match the mounting KDUGZDUHRIWKHSRZHUWRROZLOOUXQRXWRIEDODQFH YLEUDWHH[FHVVLYHODQGPDFDXVHORVVRIFRQWURO

7. Do not use a damaged accessory. Before each use inspect the accessory such as abrasive wheels for chips and cracks, EDFNLQJSDGIRUFUDFNVWHDURUH[FHVVZHDU, wire brush for loose or cracked wires. If power tool or accessory is dropped, inspect for damage or install an undamaged accessory. After inspecting and installing an accessory, position yourself and bystanders away from the plane of the rotating accessory and run the power tool at maximum no-load speed for one minute. Damaged accessories will QRUPDOOEUHDNDSDUWGXULQJWKLVWHVWWLPH
8. Wear personal protective equipment. Depending on application, use face shield, safety goggles or safety glasses. As appropriate, wear dust mask, hearing protectors, gloves and workshop apron capable of stopping small abrasive or workpiece fragments. The eye protection must be capable of stopping flying debris generated by various operations.7KHHHSURWHFWLRQPXVW EHFDSDEOHRIVWRSSLQJIOLQJGHEULVJHQHUDWHGE YDULRXVRSHUDWLRQV7KHGXVWPDVNRUUHVSLUDWRU PXVWEHFDSDEOHRIILOWHULQJRXWSDUWLFOHVJHQHUDWHG E\RXURSHUDWLRQ3URORQJHGH[SRVXUHWRKLJK intensity noise may cause hearing loss.
9. Keep bystanders a safe distance away from work area. Anyone entering the work area must wear personal protective equipment. )UDJPHQWVRIZRUNSLHFHRURID broken accessory may fly away and cause LQMXUEHRQGLPPHGLDWHDUHDRIRSHUDWLRQ

OPERATION

MAINTENANCE

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SAFETY

10. Hold power tool by insulated gripping surfaces only, when performing an operation where the accessory may contact hidden wiring or its own cord. An accessory contacting a OLYHZLUHPDPDNHH[SRVHGPHWDOSDUWVRI WKHSRZHUWRROOLYHDQGVKRFNWKHRSHUDWRU
11. Never lay the power tool down until the accessory has come to a complete stop. 7KHVSLQQLQJDFFHVVRUPDJUDEWKHVXUIDFH DQGSXOOWKHSRZHUWRRORXWRIRXUFRQWURO
12. Do not run the power tool while carrying it at your side. Accidental contact with the VSLQQLQJDFFHVVRUFRXOGVQDJRXUFORWKLQJ SXOOLQJWKHDFFHVVRULQWRRXUERG
13. Regularly clean the power tool’s air vents. The motor’s fan will draw the dust inside WKHKRXVLQJDQGH[FHVVLYHDFFXPXODWLRQRI SRZGHUHGPHWDOPDFDXVHHOHFWULFDOKD]DUGV
14. Do not operate the power tool near flammable materials. 6SDUNVFRXOGLJQLWHWKHVHPDWHULDOV
15. Do not use accessories that require liquid coolants. 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.

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.

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.

SETUP

OPERATION

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SAFETY

SETUP

Kickback and Related Warnings

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. Maintain a firm grip on the power tool and position your body and arm to allow you to resist kickback forces. Always use auxiliary handle, if provided, for maximum control over kickback or torque reaction during start-up. 7KHRSHUDWRUFDQFRQWUROWRUTXHUHDFWLRQVRU NLFNEDFNIRUFHVLISURSHUSUHFDXWLRQVDUHWDNHQ
2. Never place your hand near the rotating accessory. Accessory may kickback over your hand.
3. Do not position your body in the area where power tool will move if kickback occurs. .LFNEDFNZLOOSURSHOWKHWRROLQGLUHFWLRQRSSRVLWH WRWKHZKHHO¶VPRYHPHQWDWWKHSRLQWRIVQDJJLQJ
4. Use special care when working corners, sharp edges etc. Avoid bouncing and snagging the accessory.&RUQHUVVKDUSHGJHVRUERXQFLQJ have a tendency to snag the rotating accessory and cause loss of control or kickback.

5. Do not attach a saw chain woodcarving blade or toothed saw blade. Such blades create frequent kickback and loss of control.

Safety Warnings Specific for Grinding

1. Use only wheel types that are recommended for your power tool and the specific guard designed for the selected wheel. :KHHOVIRUZKLFKWKHSRZHUWRROZDVQRWGHVLJQHG cannot be adequately guarded and are unsafe.
2. The guard must be securely attached to the power tool and positioned for maximum safety, so the least amount of wheel is exposed towards the operator. 7KHJXDUGKHOSVWRSURWHFWRSHUDWRUIURPEURNHQ wheel fragments and accidental contact with wheel.
3. Wheels must be used only for recommended applications. For example: do not grind with the side of wheel. Grinding wheels are intended IRUSHULSKHUDOJULQGLQJVLGHIRUFHVDSSOLHGWR these wheels may cause them to shatter.

4. Always use undamaged wheel flanges that are of correct size and shape for your selected wheel. 3URSHUZKHHOIODQJHVVXSSRUWWKHZKHHO WKXVUHGXFLQJWKHSRVVLELOLWRIZKHHOEUHDNDJH
5. Do not use worn down wheels from larger power tools. Wheel intended for larger SRZHUWRROLVQRWVXLWDEOHIRUWKHKLJKHU VSHHGRIDVPDOOHUWRRODQGPDEXUVW
6. Dress appropriately. Wear leather leggings and fire resistant footwear during XVH’RQRWZHDUSDQWVZLWKFXIIVVKLUWV ZLWKRSHQSRFNHWVRUDQFORWKLQJWKDWFDQ FDWFKDQGKROGPROWHQPHWDORUVSDUNV

OPERATION

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SAFETY

Safety Warnings Specific for Sanding Operations
Do not use excessively oversized sanding disc paper. Follow manufacturer’s recommendations when selecting sanding paper./DUJHUVDQGLQJSDSHUH[WHQGLQJEHRQGWKHVDQGLQJSDG SUHVHQWVDODFHUDWLRQKD]DUGDQGPDFDXVHVQDJJLQJWHDULQJRIWKHGLVFRUNLFNEDFN
Safety Warnings Specific for Wire Brushing Operations

1. Be aware that wire bristles are thrown by the brush even during ordinary operation. Do not overstress the wires by applying excessive load to the brush. The wire bristles FDQHDVLOSHQHWUDWHOLJKWFORWKLQJDQGRUVNLQ

2. If the use of a guard is recommended for wire brushing, do not allow any interference of the wire wheel or brush with the guard. :LUHZKHHORUEUXVKPDH[SDQGLQGLDPHWHU due to work load and centrifugal forces.

Lithium Battery Safety Warnings

LITHIUM BATTERIES STORE A LARGE AMOUNT OF ENERGY
AND WILL VENT FIRE OR EXPLODE IF MISTREATED:

1. Keep Battery Pack dry.
2. DO NOT DO ANY OF THE FOLLOWING TO THE BATTERY PACK: a. Open, b. Drop, c. Short-circuit, d. Puncture, e. Incinerate, or f. Expose to temperatures greater than 265°F.
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.

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SAFETY

Vibration Safety
This tool vibrates during use. Repeated or long-term exposure to vibration may cause temporary or permanent physical injury, particularly to the hands, arms and shoulders. To reduce the risk of vibration-related injury:
1. Anyone using vibrating tools regularly or for an extended period should first be examined by a doctor and then have regular medical check-ups to ensure medical problems are not being caused or worsened from use. Pregnant women or people who have impaired blood circulation to the hand, past hand injuries, nervous system disorders, diabetes, or Raynaud’s Disease should not use this tool. If you feel any medical or physical symptoms related to vibration (such as tingling, numbness, and white or blue fingers), seek medical advice as soon as possible.

2. Do not smoke during use. Nicotine reduces the blood supply to the hands and fingers, increasing the risk of vibration-related injury.
3. Wear suitable gloves to reduce the vibration effects on the user.
4. Use tools with the lowest vibration when there is a choice between different processes.
5. Include vibration-free periods each day of work.
6. Grip tool as lightly as possible (while still keeping safe control of it). Let the tool do the work.
7. To reduce vibration, maintain the tool as explained in this manual. If any abnormal vibration occurs, stop use immediately.

SAVE THESE INSTRUCTIONS.

SETUP

OPERATION

MAINTENANCE

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Grounding

TO PREVENT ELECTRIC SHOCK AND DEATH FROM INCORRECT GROUNDING WIRE CONNECTION: Check with a qualified electrician if you are in doubt as to whether the outlet is properly grounded. Do not modify the power cord plug provided with the tool. Never remove the grounding prong from the plug. Do not use the tool if the power cord or plug is damaged. If damaged, have it repaired by a service facility before use. If the plug will not fit the outlet, have a proper outlet installed by a qualified electrician.
Extension Cords
Note: Extension cords must not be used with this item’s Charger.

Symbology

Double Insulated

V

Volts

~

Alternating Current

A

Amperes

n0

xxxx/min.

No Load 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 NIOSHapproved 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.

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Specifications

Battery Type
Charger Type No Load Speed Spindle Thread Capacity

Bauer 20V Li-Ion Battery Pack (64816) Bauer 20V Li-Ion Charger (57006)
n0: 10,500/min 5/8-11 UNC
4-1/2″ (115mm)

SAFETY

SETUP

OPERATION

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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.
TO PREVENT SERIOUS INJURY FROM ACCIDENTAL OPERATION: Make sure that the Power Switch/Trigger is in the off-position and remove its Battery Pack before performing any procedure in this section. Note: For additional information regarding the parts listed in the following pages, refer to the Assembly Diagram near the end of this manual.
Components

Spindle Lock Button

Side Handle Power Switch

Wheel (sold separately)

Wheel Guard

Main Handle

Battery Pack (sold separately)

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SAFETY

SETUP

Installing Wheel Guard

TO PREVENT SERIOUS INJURY: Do not operate this tool without the Wheel Guard properly installed.

Note: Grinding Wheel sold separately.
Note: Make sure Battery Pack is removed and tool is off before installing Wheel or Wheel Guard.
1. Depress the Spindle Lock Button and rotate the Clamp Nut until the Spindle Locks.
2. Loosen and remove Clamp Nut from the Spindle. Remove Disc Flange.

5. Replace Disc Flange. Make sure the flats on bottom of the Disc Flange are engaged with the depressed center of the Wheel Guard.
6. Check the Wheel Guard to ensure it is firmly in place. Adjust if necessary before proceeding.
Disc Flange

3. Install Wheel Guard over the Spindle.

Wheel Guard

4. Rotate the Wheel Guard as needed to shield you during the planned work.

Spindle
Spindle Lock Button
Figure A: Guard Installation

Installing Side Handle

TO PREVENT SERIOUS INJURY: Do not operate this tool with one hand only or without the Auxiliary Handle properly installed.

1. The Side Handle can be installed on the left, or right side of the grinder, depending on operator preference.
2. Insert the Side Handle into the desired operating position.
3. Turn the side handle clockwise to securely tighten.

4. Reposition Wheel Guard if necessary. Wheel Guard should be installed opposite the Side Handle.
a. Make sure Battery Pack has been removed and tool is off.
b. Unlock Guard Clasp by pulling Clasp out (away from Grinder).
c. Rotate Guard to correct position.
d. Relock the Guard Clasp by pushing Clasp in.

Note: Raised ridge on Wheel Guard should be seated in the groove on the Bearing Cap.

OPERATION

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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 Power Switch/Trigger is in the off-position and remove its Battery Pack before performing any procedure in this section.
Installing a Non-threaded Grinding Wheel

1. The Grinding Wheel MUST be: · rated to at least 10,500 RPM. · no larger than 4-1/2 (115 mm) in diameter. · fitted with a 5/8 round arbor hole. · 0.3 thick or less. · suitable for surface grinding, not edge grinding. · dry and clean. · undamaged by inspection.
2. Press in and hold the Spindle Lock Button to prevent the Spindle from turning.
3. Remove the Clamp Nut. Keep the Disc Flange in position on the Spindle.
4. Closely inspect the wheel before mounting.
WARNING! TO PREVENT SERIOUS INJURY: Do not use worn or damaged wheels.
5. Place Grinding Wheel on the Spindle.
6. Thread the Clamp Nut on the Spindle. Tighten by hand.
Note: The Clamp Nut 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 Clamp Nut so this step is on the outside.

7. Depress the Spindle Lock Button and rotate the wheel clockwise until the Spindle locks in position.
8. Tighten the Clamp Nut with a wrench. Tighten only enough so that the wheel is securely held on the spindle. See Figure B. WARNING: To prevent serious injury, do not overtighten. Overtightening can damage the wheel, causing wheel failure.
Wrench Clamp Nut Grinding Wheel (not included)
Disc Flange
Wheel Guard
Spindle
Spindle Lock Button
Figure B: Wheel and Guard Installation

Installing a Threaded Accessory

TO PREVENT INJURY: Wear heavy-duty work gloves when handling wire wheels and brushes. These accessories are sharp and can cause injury.

1. The accessory MUST be: · rated to at least 10,500 RPM. · no larger than 4-1/2 (115 mm) in diameter. · fitted with a threaded opening of 5/8-11 UNC. · undamaged. · a sanding disc and backing pad, or a sanding flap disc; a wire wheel, or a wire cup brush; (accessories not included).

2. Press in and hold the Spindle Lock Button to prevent the Spindle from turning.
3. Remove the Clamp Nut and the Disc Flange and keep in a safe place.
4. Thread disc accessory firmly onto the Spindle. Wrench tighten onto the spindle.

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SAFETY

Charging

Charge battery before using this tool. Follow instructions included with battery charger.

Workpiece and 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. 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.

Grinding and Wire Brushing Instructions

TO PREVENT SERIOUS INJURY: Grip the tool firmly in both hands.

1. Make sure that the Switch Trigger is in the off-position, then attach Battery Pack.
2. Press the back of the Switch Trigger down and then push it forward to start the tool. To turn the tool off, release the Switch Trigger.

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.

3. To lock the tool in the on position, press the back of the Switch Trigger down and then push it forward. Then press the front end of the Switch Trigger down. To release the lock, press the back of the Switch Trigger.
4. Allow the tool to come up to full speed before touching the work material.

7. TO PREVENT ACCIDENTS, AFTER USE: Turn off the tool. WARNING! TO PREVENT SERIOUS INJURY: Allow the tool to come to a complete stop before setting it down. Remove Battery Pack. Clean, then store the tool indoors out of children’s reach.

SETUP

OPERATION

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Sanding Instructions

TO PREVENT SERIOUS INJURY: Grip the tool firmly in both hands.

1. Wipe the work surface clean of all dirt and debris, especially that of previous coarser sanding sessions, which will scratch the surface of a finer grit sanding session.
2. Attach the desired grit Sanding Disk (sold separately) onto the Backing Pad.
3. Make sure that the Switch/Trigger is in the off-position, then attach Battery Pack.
4. Press the back of the Switch Trigger down and then push it forward to start the tool. To turn the tool off, release the Switch Trigger.
5. To lock the tool in the on position, press the back of the Switch Trigger down and then push it forward. Then press the front end of the Switch Trigger down. To release the lock, press the back of the Switch Trigger.

6. Allow the tool to come up to full speed before touching the work material, then gently contact the surface.
7. Keep heavy pressure off of the tool when operating. Allow the tool to do the work.
8. Move the tool in a uniform pattern up and down or side to side while sanding to ensure even sanding.
9. Periodically, stop the tool and check for disc wear. Replace worn sanding discs as needed.
10. TO PREVENT ACCIDENTS, AFTER USE: Turn off the tool. WARNING! TO PREVENT SERIOUS INJURY: Allow the tool to come to a complete stop before setting it down. Remove Battery Pack. Clean, then store the tool indoors out of children’s reach.

SETUP

OPERATION

MAINTENANCE

Item 58308

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Page 15

SAFETY

SETUP

Maintenance and Servicing
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 Power Switch/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. AFTER USE, wipe external surfaces of the tool with clean cloth.
Replacing Wheel Guard

3. 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.
4. Always check Wheel Guard for damage before use. Replace Wheel Guard if damaged.
5. 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.

1. Depress the Spindle Lock Button and rotate the Clamp Nut until the Spindle Locks.
2. Loosen and remove Clamp Nut from the Spindle. Remove Disc Flange and Grinding Wheel.
3. Unlock Guard Clasp by pulling the clasp out, away from Grinder.
4. Open Clasp fully and twist guard to release it from the locking groove and tool housing.

5. Remove Wheel Guard and place new Wheel Guard on the shoulder of the Bearing Cap.
6. Rotate Guard to correct position (opposite the Side Handle).
Note: Make sure the raised ridge on the Guard is seated in the groove on the Bearing Cap.
7. Reinstall Disc Flange, Grinding Wheel, and Clamp Nut according to instructions on Page “Installing Wheel Guard” on page 12.

Accessory Storage and Handling

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 wheels exposed to humidity or freezing temperatures must not be used.

OPERATION

MAINTENANCE

Page 16

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Item 58308

SAFETY

Troubleshooting

Problem
Tool will not start.

Possible Causes
1. Battery Pack not properly connected.

2. Battery Pack not properly charged.

3. Battery Pack worn.

4. Tool’s thermal reset breaker tripped(if equipped).
5. Internal damage or wear. (Switch, for example.)
Tool operates slowly. 1. Excess pressure applied to workpiece.
2. Battery Pack power low.
3. Battery Pack worn.

Performance

Battery Pack wearing out.

decreases over time.

Excessive noise or rattling. Overheating.

Internal damage or wear. (Bearings, for example.) 1. Forcing tool to work too fast.
2. Blocked motor housing vents.

Tool does not operate effectively.

1. Accessory loose.
2. Accessory damaged, worn or wrong type for the material.

Likely Solutions
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.
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.
Battery Pack capacity will gradually decrease through use. If symptoms are severe, recycle old Battery Pack (or dispose of properly) and replace it. Have technician service tool.
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.
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.

Follow all safety precautions whenever diagnosing or servicing the tool. Disconnect power supply before service.

SETUP

OPERATION

MAINTENANCE

Item 58308

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Page 17

SAFETY

Parts List and Diagram

PLEASE READ THE FOLLOWING CAREFULLY

THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDED THE PARTS DIAGRAM IN THIS MANUAL AS A REFERENCE TOOL ONLY. NEITHER THE MANUFACTURER NOR 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

1 Clamp Nut

3 Disc Flange

4 Wheel Guard

5 Screw, M5X16

6 Trigger Cover

7 Dust Cap

8 Output Shaft

9 Screw M4X14

10 Gear Box Cover

11 O-Ring

12 Dust Ring

13 Ball Bearing, 6001-RS

14 Wave Washer

15 Circlip

16 Output Gear

17 Needle Bearing

18 Gear Box

19 Screw, ST4.2X30

20 Spindle Lock Button

21 Spring

22 O-Ring

23 Shaft Circlip

24 Side Handle

Qty.
1 1 1 1 1 1 1 4 1 1 1 1 1 1 1 1 1 6 1 1 1 1 1

Part

Description

25 Nut, M6

26 Pinion

27 Oil-Proof Washer

28 Ball Bearing, 608

29 Bearing Plate, 608

30 Screw, M4X10

31 Rotor

32 Ball Bearing, 627

33 Stator

34 Left Housing

35 Switch Trigger

36 Switch Trigger Lever

37 Spring

38 Switch Rocker

39 Locating Pin

40 Switch

41 Controller

42 Battery Socket

43 Rating Label

44 Right Housing

45 Screw, ST4.2X14

46 Warning Label

47 Wrench

Qty.
1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 6 1 1

SETUP

OPERATION

MAINTENANCE

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 193175436825 when ordering parts.

Page 18

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Item 58308

Assembly Diagram

SAFETY

SETUP

OPERATION

MAINTENANCE

Item 58308

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Page 19

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.
26541 Agoura Road · Calabasas, CA 91302 · 1-888-866-5797

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