MasterForce 240-0024 Operating Manual
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MasterForce 240-0024 Operating Manual

MasterForce 240-0024 Operating Manual

12-in.compound miter saw with dual-laser line
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OPERATING MANUAL
12-in.Compound Miter Saw with
Dual-Laser line
240-0024
IMPORTANT :
Carefully read this Owner's Manual before using this tool. Pay close atten-
tion to all Safety Instructions, Warnings, and Caution sections. Use this tool
properly, and only for its intended use.
Safety symbols in this manual are used to flag possible dangers. The safety
symbols and their explanations require the operator's full understanding. The
safety warnings do not, by themselves, eliminate any danger, and they are not
a substitute for proper accident prevention measures.
This Safety Alert Symbol indicates caution, warning, or danger. Failure to
obey a safety warning can result in serious injury to yourself or others. To reduce
the risk of injury, fire, or electric shock, always follow the safety precautions.

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Summary of Contents for MasterForce 240-0024

  • Page 1 OPERATING MANUAL 12-in.Compound Miter Saw with Dual-Laser line 240-0024 IMPORTANT : Carefully read this Owner’s Manual before using this tool. Pay close atten- tion to all Safety Instructions, Warnings, and Caution sections. Use this tool properly, and only for its intended use.

  • Page 2: Table Of Contents

    Operation ......................Page 20 Maintenance....................Page 34 Troubleshooting ....................Page 39 Exploded View & Part List ................Page 40 Warranty ......................Page 48 PRODUCT SPECIFICATIONS Model 240-0024 Supply power 120V, 60Hz Rated current No load speed 4000RPM Saw blade 12”x/1” 60T Miter angle 50°...

  • Page 3: Rules For Safe Operation

    RULES FOR SAFE OPERATION KNOW YOUR TOOL Before operating this tool, carefully read this operating manual and all of the labels affixed to the router. Keep this manual available for future reference. IMPORTANT This tool should only be serviced by a qualified service technician. READ ALL INSTRUCTIONS THOROUGHLY GENERAL SAFETY RULES FOR ALL POWER TOOLS WARNING! Read and understand all instructions.
  • Page 4 Recommended sizes of extension cords Tool’s Ampere Volts Total length of cord in feet Cord size in rating A.W.G.(minimum) 25’ 50’ 100’ 150’ 120V~ 6-10 10-12 12-16 Not Recommended 10. WEAR PROPER APPAREL Do not wear loose clothing, gloves, neckties, rings, bracelets, or other jewelry which may get caught in moving parts.
  • Page 5 20. DIRECTION OF FEED. Feed work into a blade or cutter against the direction of rotation of the blade or cutter only. 21. NEVER LEAVE TOOL RUNNING UNATTENDED. TURN POWER OFF. Don’t leave tool until it comes to a complete stop. DOUBLE-INSULATED TOOLS 1.
  • Page 6 AVOID body contact with grounded surfaces, such as pipes, radiators,  ranges and refrigerators. There is an increased risk of electric shock if your body is grounded. DO NOT expose power tools to rain or wet conditions or use power tools in ...
  • Page 7 WARNING: The use of optical instruments such as, but not limited to, tele- scopes or transits to view the laser beam will increase eye hazard. 1. The laser shall be used and maintained in accordance with the manufacture’s instruction. 2. Never aim the beam at any person or an object other than the work piece. 3.
  • Page 8 11. ALWAYS be sure that the blade clears the workpiece. NEVER start the saw with the blade touching the workpiece. ALWAYS allow the motor to come up to full speed BEFORE starting a cut. 12. SUPPORT long workpieces when cutting to minimize the risk of blade pinching or kickback.
  • Page 9 24. DO NOT turn the motor switch on and off rapidly. This could cause the blade to loosen, which could create a hazard. Should this ever occur, stand clear and allow the saw blade to come to a complete stop. Disconnect the saw from the power source and securely tighten the blade bolt.
  • Page 10 A LWAYS check the tool for damaged parts. Before further use of the  tool, a guard or other part that is damaged should be carefully checked to determine if it will operate properly and perform its intended function. Check for misalignment or binding of moving parts, breakage of parts, and any other condition that may affect the tool’s operation.

  • Page 11: Description

    DESCRIPTION KNOW YOUR MITER SAW (Fig. 1a) Fig. 1a Safety Lock-off Button Motor On/Off Trigger Brushes Switch Work light On/Off Switch Dust Bag Laser On/Off Switch Lower Blade Guard Work Light Head Assembly Extension Locking Pin Table Saw Arm/Chop Fence Pivot Fence Lock- Throat...
  • Page 12 WARNING: Your saw should NEVER be connected to the power source when you are assembling parts, making adjustments, installing or removing blades, cleaning or when it is not in use. Disconnecting the saw will prevent accidental starting, which could cause serious personal injury. Laser On/Off Switch To turn on/off laser, press the laser button.
  • Page 13 bevel scale. The blade can be positioned at any angle, from a 90° straight cut (0° on the scale) to a 48° left and right bevel (Fig. 1a). Tighten the bevel lock knob to secure the saw head. NOTE: It is necessary to adjust the 48° left and right bevel angle specially. Miter Fence The miter fence is in two pieces, with numbered ruler on the left and right side and a slightly taller left and right side for additional support.
  • Page 14 ASSEMBLY MOUNTING THE MITER SAW TO WORK SURFACE (Fig. 2) To prevent your miter saw from Fig. 2 sliding, falling or tipping during operation, the saw must be permanently mounted to a firm, stable supporting surface, such as a workbench or piece of plywood. Four bolt holes have been provided in the saw base (one in each corner) for mounting purposes.

  • Page 15: Adjustments

    SAWDUST EJECTION PORT Fig. 3 This miter saw comes with a dust bag to help you keep the work area clean. The dust bag is ideal for smaller jobs. Dust Ejection Use a 2 1/2-in. vacuum hose adapter Port to hook up your saw to a wet/dry vacuum (sold separately).
  • Page 16 4. If the blade is not 90° to the Fig. 4a fence, unscrew the fence locking knobs completely out and remove the fence extensions. 5. Loosen all hex-head bolts (Fig.4a). Rotate the fence until the protractor is flush over its entire length.
  • Page 17 SQUARING THE BLADE TO THE MITER TABLE (Fig. 6, Fig.6b) WARNING: Failure to unplug your saw could result in accidental starting causing serious injury. Fig. 6 1. Set the bevel and miter angle scales to 0°and lock in place. 2. Lower and lock the saw arm into the “DOWN”...
  • Page 18 BEVEL ANGLE INDICATOR ADJUSTMENT (Fig. 7) If Necessary 1. Check to see if the bevel angle Fig. 7 indicator is pointing to 0° on the bevel scale. 2. If the indicator is not on 0°, loosen the bevel angle indicator screw, adjust the indicator to 0°...
  • Page 19 These setting bolt are to your left Fig. 9 and right as you face the back of the saw. (Fig.9) 6. Lift up to unlock the bevel angle lock knob (Fig.10),then adjust the blade to 45°by adjusting Stop Pawl the setting bolt clockwise or counterclockwise.

  • Page 20: Operation

    OPERATION CAUTION: ALWAYS make sure the arbor lock button is released so the blade can rotate freely. MAKE SURE that the locking pin is loose and that the saw head moves freely up and down. ENSURE that all clamps and locks are tightly in place and that there is no excessive play in any parts.
  • Page 21 SUPPORTING LONG WORKPIECES (Fig.11a) Long workpieces require extra Fig. 11a supports. The supports should be placed along the workpiece so it does not sag. The support should allow the workpiece to lay flat on the base of the saw and work table during the cutting operation.
  • Page 22 1. Release the tightening knob Fig. 12a counterclockwise, and separate the two parts. (Fig.12a, Fig12b). 2. Insert the hold down clamp in the hole as shown, press the lock button to adjust the the width according to the workpiece. (Fig.12c) 3.
  • Page 23 USING THE MITER SAW CAUTION: Always hold the cutting handle firmly when making a cut, be- cause the starting and stopping action of the motor may cause the handle to move up or down slightly. NOTE: Make the ON/OFF trigger Fig.
  • Page 24 To Crosscut With Your Miter Saw WARNING: Failure to unplug your saw could result in accidental starting causing serious injury. 1. Unplug the saw. 2. Lock the saw arm in the down position by pushing in the locking pin. 3. Raise miter lock lever and Fig.
  • Page 25 11. When cutting long workpieces, Fig. 14b pull out extension wing for extra support for the long workpieces. (Fig. 14b) CAUTION: NEVER use another person as an additional support for a work- piece that is longer or wider than the basic saw table, or to help feed, sup- port, or pull the workpiece.
  • Page 26 BEVEL CUTTING (Fig. 15) Fig. 15 A bevel cut is a cut made across the grain of the workpiece with the blade at an angle to the workpiece. A straight bevel cut is made with the miter table set in the 0° position and the saw arm set at a bevel angle between 0°...
  • Page 27 CAUTION: NEVER use another person as an additional support for a work- piece that is longer or wider than the basic saw table, or to help feed, sup- port, or pull the workpiece. WARNING: To avoid serious personal injury, ALWAYS keep your hands outside the “no hands zone”, as marked on the saw table, which is at least 3 inches from the blade.
  • Page 28 3. Splintering typically happens due to incorrect blade style, dull blade, thinness of workpiece, or improperly dried wood. NOTE: Always perform a dry run cut so you can determine if the operation being attempted is possible before power is applied to miter saw. 4.
  • Page 29 To Make a Compound Miter Cut with your Miter Saw 1. Unplug the saw. WARNING: Failure to unplug your saw could result in accidental starting causing serious injury. 2. Release the saw arm by pulling out the locking pin. 3. Raise miter lock lever and pressing the detent locking knob to loosen the miter table.
  • Page 30 WARNING: To avoid serious personal injury, ALWAYS keep your hands outside the “no hands zone”, as marked on the saw table, which is at least 3 inches from the blade. Also, NEVER perform any cutting operation “freehand” (i.e. without holding the workpiece against the fence); the blade could grab the workpiece, causing it to slip and twist.
  • Page 31 Each B (Bevel) and M (Miter) Setting is listed to the closest 0.005° COMPOUND-ANGLE SETTINGS FOR POPULAR STRUCTURES *Pitch of Side = Angle of side from vertical. Example: NUMBER OF SIDES PITCH OF SIDE M-45.00 M-36.00 M-30.00 M-25.71 M-22.50 M-20.00 M-18.00 B- 0.00 B- 0.00...
  • Page 32 CUTTING CROWN MOLDING (Fig. 18) Your miter saw is ideal for cutting Fig. 18 crown molding. In order to fit properly, crown molding must be compound-mitered with extreme accuracy. To fit flat against the ceiling and wall, the sum of the angles of the crown molding’s two connecting surfaces must equal 90°(Fig.18)
  • Page 33 COMPOUND BEVEL /MITER SETTINGS Bevel Miter Type of cut Setting Setting 33.9° Left 31.6°Right Inside corner - Left side 1. Position top of molding against fence. 2. Miter table set at RIGHT 31.6° 3. LEFT side is finished piece. 33.9° Right 31.6°Left Inside corner - Right side 1.

  • Page 34: Maintenance

    CUTTING WARPED MATERIAL (Fig.19 and 20) WARNING: To avoid kickback Fig. 19 Top View and to avoid serious personal in- jury NEVER position the concave side of bowed or warped material against the fence. When cutting warped material, BE CERTAIN that the material to be cut is positioned on the miter table with the convex side against the fence, as shown (Fig.
  • Page 35 WARNING: Always wear safety goggles or safety glasses with side shields during power tool operations, or when blowing dust. If operation is dusty, also wear a dust mask. ROUTINE MAINTENANCE WARNING: DO NOT at any time let brake fluid, gasoline, petroleum-based products, penetrating oils, etc.
  • Page 36 WARNING: To prevent personal injury, ALWAYS disconnect the plug from power source BEFORE assembling parts, making adjustments or changing blades. WARNING: Be sure to wear protective work gloves while handling a saw blade. The blade can injure unprotected hands. 1. Raise the saw arm. 2.
  • Page 37 REPLACEMENT OF CARBON BRUSHES (Fig. 22, 23) The factory installed carbon Fig. 22 brushes in the motor assembly inspect it regularly by unplugging tool. Keep brushes clean and sliding freely in their guides. Plastic Cap Always replace a used brush in the same orientation in the holder as it was prior to its removal.
  • Page 38 LOWER BLADE GUARD WARNING: DO NOT use the saw without the lower blade guard. The low- er blade guard is attached to the saw for your protection. Should the lower blade guard become damaged, do not use the saw until the damaged guard has been replaced.

  • Page 39: Troubleshooting

    TROUBLE SHOOTING PROBLEM PROBLEM CAUSE SUGGESTED CORRECTIVE ACTION Brake does not Motor brushes not sealed Inspect/clean/ stop blade within or lightly sticking replace brushes See 5 seconds. MAINTENANCE section Motor brake overheated Use a recommended blade. from use of defective or wrong size blade or rapid ON/OFF cycling.

  • Page 40: Exploded View & Part List

    Exploded View...

  • Page 42: Part List

    Part List No. Part Name Quantity page Base Screw M4X10 Foot Rubber Ring Bevel Bracket 45 Bevel Override Lever Screw M6X30 Nut M6 Screw M6X10 Screw M10X25 Screw M5X10 D Handle Up D Handle Down Miter Lock Cam D Handle Support Screw ST4.2X16 Bolt M5X28 Nut M5...
  • Page 43 Bevel Lock Baffle Bevel Lock Bracket Cam Shaft Bevel Lock Pole Nut M6 Bevel Change Pole Bevel Change Knob Turn Table Gasket Ø105X1 Bevel Lock Linker Miter Lock Pad 33.9 Bevel Stop Pawl Bevel Lock Shaft Bevel Shaft Shoulder Screw ML35 Ø6 M4X6 Shoulder Screw ML35 Ø8 M5X8 Spring Board Miter Lock Pole...
  • Page 44 E Ring 9 Screw M12X12 Screw M5X16 Bolt M8X30 Nut M8 Gear Case Cover Arbor Lock Pin Plate Pinion Arbor Lock Pin Spring Screw M4x8 Rolling Bearing 6201-2RS Needle Bearing HK1010 Big Gear Gear Shaft Key 5X10 Twins Laser Set LED Snake Light LED Mount Gear Case...
  • Page 45 101 Inner Wire Trough 102 Dust Board 103 Washer Ø13xØ22x0.5 104 Rivet M4X6 105 Rolling Bearing 106 Washer 5 107 Key 4X16 108 Spring Washer 109 Screw M3X20 15mm, 110 Screw M3X12 111 Screw M3X8 112 Rotor 113 Rolling Bearing 114 Rolling Bearing 115 Stator 116 Brush...
  • Page 46 135 Torsion Spring 136 Bolt M6X16 137 Washer 6 138 Control PCB 139 Switch PCB 140 Switch Panel 141 Switch Knob 142 Transparent Cover 143 Screw ST2.9X6 144 Stepdown Transformer 145 Inner Wire Assy 146 Screw M3X12 147 Closed-end Wire Connecter 148 Inner Wire Assy 149 Inner Wire Assy 150 Fixed Fence...
  • Page 47 169 Miter Pointer 170 Bevel Pointer 171 Inner Flange 172 Outter Flange 173 Flange Screw 174 Pivot Shaft 175 Turn table Axis 176 Lock Down Pin 177 Shoulder Screw 178 Shoulder Screw 179 Quick Lock Screw(L) 180 Quick Lock Screw(R) 181 Miter Scale 182 Bevel Scale 183 Torsion Spring...

  • Page 48: Warranty

    203 Dust Spout 204 Left Sliding Base 205 Extend Pole 206 Right Sliding Base 207 Wrench 208 Dust Bag Set 209 Work Piece Clamp 210 Screw 211 Terminal 212 Spring 213 Screw M4X6 WARRANTY If, during normal use, this MASTERFORCETM power tool breaks or fails due to a defect in material or workmanship within three years from the date of original purchase, simply bring this tool and its sales receipt back to your nearest Menards®...

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