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For technical questions, please call 1-888-866-5797.

Item 57921 

        

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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. 

Safety instructions for mitre saws

a. 

Mitre saws are intended to cut wood or 

wood-like products, they cannot be used 

with abrasive cut-off wheels for cutting 

ferrous material such as bars, rods, studs, 

etc. 

Abrasive dust causes moving parts 

such as the lower guard to jam. Sparks from 
abrasive cutting will burn the lower guard, 
the kerf insert and other plastic parts.

b. 

Use clamps to support the workpiece 

whenever possible. If supporting the 

workpiece by hand, you must always keep 

your hand at least 100 mm from either side 

of the saw blade. Do not use this saw to 

cut pieces that are too small to be securely 

clamped or held by hand.

 If your hand is 

placed too close to the saw blade, there is an 
increased risk of injury from blade contact.

c. 

The workpiece must be stationary and 

clamped or held against both the fence 

and the table. Do not feed the workpiece 

into the blade or cut 

freehand

 in any way. 

Unrestrained 

or moving workpieces could 

be thrown at high speeds, causing injury.

d. 

Push the saw through the workpiece. Do 

not pull the saw through the workpiece. To 

make a cut, raise the saw head and pull it out 

over the workpiece without cutting, start the 

motor, press the saw head down and push 

the saw through the workpiece.

 Cutting on 

the pull stroke is likely to cause the saw blade 
to climb on top of the workpiece and violently 
throw the blade assembly towards the operator.

e. 

Never cross your hand over the intended 

line of cutting either in front or behind 

the saw blade. 

Supporting the workpiece 

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to the right of the saw blade with your left 
hand or vice versa is very dangerous.

f. 

Do not reach behind the fence with either 

hand closer than 100 mm from either 

side of the saw blade, to remove wood 

scraps, or for any other reason while 

the blade is spinning. 

The proximity of the 

spinning saw blade to your hand may not be 
obvious and you may be seriously injured.

g. 

Inspect your workpiece before cutting. If the 

workpiece is bowed or warped, clamp it with 

the outside bowed face toward the fence. 

Always make certain that there is no gap 

between the workpiece, fence and table along 

the line of the cut. 

Bent or warped workpieces 

can twist or shift and may cause binding on the 
spinning saw blade while cutting. There should 
be no nails or foreign objects in the workpiece.

h. 

Do not use the saw until the table is clear 

of all tools, wood scraps, etc., except for 

the workpiece. 

Small debris or loose pieces 

of wood or other objects that contact the 
revolving blade can be thrown with high speed.

i. 

Cut only one workpiece at a time. 

Stacked multiple workpieces cannot be 
adequately clamped or braced and may 
bind on the blade or shift during cutting.

j. 

Ensure the mitre saw is mounted or placed 

on a level, firm work surface before use. 

A level and firm work surface reduces the 
risk of the mitre saw becoming unstable.

k. 

Plan your work. Every time you change the 

bevel or mitre angle setting, make sure the 

adjustable fence is set correctly to support 

the workpiece and will not interfere with 

the blade or the guarding system. 

Without 

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on the table, move the saw blade through a 
complete simulated cut to assure there will be 
no interference or danger of cutting the fence.

l. 

Provide adequate support such as table 

extensions, saw horses, etc. for a workpiece 

that is wider or longer than the table top. 

Workpieces longer or wider than the mitre saw 
table can tip if not securely supported. If the 
cut-off piece or workpiece tips, it can lift the 
lower guard or be thrown by the spinning blade.

m. 

Do not use another person as a substitute 

for a table extension or as additional 

support. 

Unstable support for the workpiece 

can cause the blade to bind or the workpiece 
to shift during the cutting operation pulling 
you and the helper into the spinning blade.

n. 

The cut-off piece must not be jammed or 

pressed by any means against the spinning 

saw blade. 

If confined, i.e. using length 

stops, the cut-off piece could get wedged 
against them blade and thrown violently.

o. 

Always use a clamp or a fixture designed 

to properly support round material such as 

rods or tubing. 

Rods have a tendency to roll 

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pull the work with your hand into the blade.

p. 

Let the blade reach full speed before 

contacting the workpiece. 

This will reduce 

the risk of the workpiece being thrown.

Summary of Contents for 57921

Page 1: ...a safe and dry place for future reference 21l 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 Frei...

Page 2: ... 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 ter...

Page 3: ...rotection 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 cou...

Page 4: ...obvious and you may be seriously injured g Inspect your workpiece before cutting If the workpiece is bowed or warped clamp it with the outside bowed face toward the fence Always make certain that there is no gap between the workpiece fence and table along the line of the cut Bent or warped workpieces can twist or shift and may cause binding on the spinning saw blade while cutting There should be n...

Page 5: ... 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 ...

Page 6: ...lood circulation to the hand past hand injuries nervous system disorders diabetes or Raynaud s Disease should not use this tool If you feel any symptoms related to vibration such as tingling numbness and white or blue fingers seek medical advice as soon as possible b Do not smoke during use Nicotine reduces the blood supply to the hands and fingers increasing the risk of vibration related injury c...

Page 7: ...er outlet installed by a qualified electrician Extension Cords Note Extension cords must not be used with this item s Charger Symbology V Volts Direct 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 Read the manual before set up and or use WARNING marking concerning Risk of Fire Do no...

Page 8: ... 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 18 Mounting 1 Use the four bolt holes provided in the Base to mount the Miter Saw to a stable support before use Mounting hardware not included 2 Ensure that the Miter Saw is always stable and secure e g fixed to a bench Assembly 1 Squeeze the metal c...

Page 9: ... separately Functions Dust Bag Slide Bar Adjustment Knob Clamp Safety Lock Button Spindle Lock Motor Lower Blade Guard Fence Miter Scale Miter Scale Pointer Miter Detent Lever Miter Lock Knob Miter Table Base Depth Stop Bevel Scale Trigger Handle Bevel Lock Knob Battery Battery Release Button Upper Blade Guard Kerf Board Slide Lock Knob Guide System Power Switch Wrench Detent Override Head Lock Do...

Page 10: ... the material to be cut 2 Use only a saw blade diameter in accordance with the markings on the saw See specification table for the bore diameter and the maximum kerf of the saw blade 3 Use only saw blades that are marked with a speed equal or higher than the speed marked on the tool Guard Setup Check that the Lower Blade Guard is in place moves freely and closes instantly Dust Extraction Setup 1 T...

Page 11: ...Bolt Spindle Lock 6 Remove the Arbor Bolt Flat Washer and Outer Flange IMPORTANT The Arbor Bolt has a left handed thread and removes by turning CLOCKWISE Arbor Bolt Washer Outer Flange Spindle Blade Note Make sure the Inner Flange stays in place on the Spindle 7 Install the new Blade Make sure that the Blade s rotation arrow points in the same direction as the rotation arrow on the Upper Blade Gua...

Page 12: ...Tighten the Miter Lock Knob after adjusting the miter angle 5 With the Table adjusted to the desired angle place the workpiece flush against the Fence secure it with the Clamp and make the cut Adjusting the Bevel Angle A bevel cut is one that is at an angle vertically Bevel cuts can be used to miter relatively wide and thin material Bevel cuts can be used in combination with a miter cut to form a ...

Page 13: ...en cutting 1 Press the Power Switch located above the Battery Pack to activate the Guide System Blade Guide Power Switch 2 Lower the Saw Head Assembly so that the blade is 1 4 inches from the workpiece The shadow of the blade will appear on the workpiece showing where the blade teeth will make contact as the cut is made Workpiece Set Up 1 Secure loose workpieces using a vise or clamps not included...

Page 14: ...ial in place using the Clamp Ensure that the work material is level and supported securely Use saw horses or supports if necessary DANGER Saws can quickly amputate fingers if misused Keep hands well clear of cutting area 8 Grip the Saw Handle press the Trigger Lock Button with your thumb and squeeze the Trigger to start the Saw 9 Use two hands and hold workpiece securely against table and fence at...

Page 15: ...ERLY Do not short incinerate or open battery 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 Checking and Calibrating the Fence The Fence holds the workpiece in a fixed position while the Table and or the Saw Head Assembly are adjusted in a miter or bevel angle To make...

Page 16: ...to the left loosen the Lock Nut on the 0 Bevel Angle Adjustment Bolt and adjust the Bolt in or out with a hex key to increase or decrease the bevel angle 7 Tilt the Saw Head back to the right at 0 bevel and recheck for alignment 8 After alignment is achieved tighten the Bevel Lock Knob and Adjustment Bolt Lock Nut 0 Bevel Angle Adjustment Bolt Framing Square Blade WARNING TO PREVENT SERIOUS INJURY...

Page 17: ...tery Pack burnt out 4 Internal damage or wear Trigger 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 prop...

Page 18: ...45 Elastic Pin 4 46 Cushion 2 47 Slide Bar 2 48 Wool Felt 4 49 Bearing End Cover 1 50 Linear Bearing 3 51 Bearing Bush 2 52 Slide Lock Knob 1 53 Spring 1 Part Description Qty 54 Bevel Pointer 1 55 Bearing End Cover 1 56 Cross Sunk Head Screw 5 57 Kerf Board 1 58 Hex Bolt 1 59 Bevel Scale Label 1 60 Miter Pointer 1 61 Miter Table 1 62 Pin 1 63 Miter Lock Knob 1 64 Handle Cap 1 65 Dust Collection Pl...

Page 19: ...Page 19 For technical questions please call 1 888 866 5797 Item 57921 SAFETY OPERATION MAINTENANCE SETUP Assembly Diagram ...

Page 20: ...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 lim...

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