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                        OPERATOR’S MANUAL
12 in. SLIDING COMPOUND MITER 
™
SAW WITH EXACTLINE LASER
Double Insulated
MS1290LZ1
Your miter saw has been engineered and manufactured to our high standard for dependability, ease of operation, and
operator safety. When properly cared for, it will give you years of rugged, trouble-free performance.
 WARNING:
To reduce the risk of injury, the user must read and understand the operator’s manual before using this product.
®
Thank you for buying a RIDGID product.
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                        TABLE OF CONTENTS  Introduction ......................................................................................................................................................................2 � General Safety Rules .....................................................................................................................................................3-4 � Specific Safety Rules .................................................................................................
                    
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                        GENERAL SAFETY RULES  SECURE WORK. Use clamps or a vise to hold work when  practical, it is safer than using your hand and frees both   WARNING: hands to operate the tool. Read and understand all instructions. Failure to   DO NOT OVERREACH. Keep proper footing and balance  follow all instructions listed below, may result in  at all times. electric shock, fire and/or serious personal injury.  MAINTAIN TOOLS WITH CARE. Keep tools sharp and  clean for better and safer performance. Follow instruc
                    
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                        GENERAL SAFETY RULES  NEVER USE IN AN EXPLOSIVE ATMOSPHERE. Normal   DO NOT USE TOOL IF SWITCH DOES NOT TURN IT  sparking of the motor could ignite fumes. ON AND OFF. Have defective switches replaced by an  authorized service center.  INSPECT TOOL CORDS PERIODICALLY. If  damaged,  have repaired by a qualified service technician at an   USE ONLY CORRECT BLADES. Do not use blades with  authorized service facility. The conductor with insulation  incorrect size holes. Never use blade washers or 
                    
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                        SPECIFIC SAFETY RULES  NEVER hand hold a workpiece that is too small to be  MAKE SURE WORK AREA HAS AMPLE LIGHTING to  clamped. Keep hands clear of the cutting area. see the work and that no obstructions will interfere with  safe operation BEFORE performing any work using your   NEVER reach behind, under, or within three inches of the  saw. blade and its cutting path with your hands and fingers for  any reason.  ALWAYS TURN OFF THE SAW before disconnecting it  to avoid accidental starting wh
                    
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                        SYMBOLS Some of the following symbols may be used on this tool. Please study them and learn their meaning. Proper interpretation of these symbols will allow you to operate the tool better and safer. SYMBOL NAME DESIGNATION/EXPLANATION V Volts Voltage A Amperes Current Hz Hertz Frequency (cycles per second) W Watt Power min Minutes Time Alternating Current Type of current Direct Current Type or a characteristic of current n No Load Speed Rotational speed, at no load o Class II Construction Double
                    
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                        SYMBOLS The following signal words and meanings are intended to explain the levels of risk associated with this product.   SYMBOL SIGNAL       MEANING Indicates an imminently hazardous situation, which, if not avoided, will  DANGER: result in death or serious injury. Indicates a potentially hazardous situation, which, if not avoided, could  WARNING: result in death or serious injury. Indicates a potentially hazardous situation, which, if not avoided, may  CAUTION: result in minor or moderate inj
                    
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                        ELECTRICAL DOUBLE INSULATION EXTENSION CORDS Double insulation is a concept in safety in electric power When using a power tool at a considerable distance from  tools, which eliminates the need for the usual three-wire a power source, be sure to use an extension cord that has  grounded power cord. All exposed metal parts are isolated the capacity to handle the current the tool will draw. An  from the internal metal motor components with protect- undersized cord will cause a drop in line voltage,
                    
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                        GLOSSARY OF TERMS Anti-Kickback Pawls (radial arm and table saws) Non-Through Cuts A device which, when properly installed and maintained, Any cutting operation where the blade does not extend  is designed to stop the workpiece from being kicked back completely through the thickness of the workpiece. toward the front of the saw during a ripping operation. Pilot Hole (drill presses) Arbor A small hole drilled in a workpiece that serves as a guide for  The shaft on which a blade or cutting tool is
                    
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                        FEATURES PRODUCT SPECIFICATIONS Cutting Capacity with Miter at 0°/Bevel 0°: Blade Diameter .......................................................... 12 in.  Maximum nominal lumber sizes: ....................2 x 12, 4 x 4 Blade Arbor Hole ..........................................................1 in. Cutting Capacity with Miter at 45°/Bevel 0°: No Load Speed .....................................4,000 r/min. (RPM)  Maximum nominal lumber sizes: ..............................2 x 10 Input ........
                    
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                        FEATURES KNOW YOUR COMPOUND MITER SAW ELECTRIC BRAKE See Figure 1. An electric brake quickly stops blade rotation after the switch  trigger is released. The safe use of this product requires an understanding of  the information on the tool and in this operator’s manual as  ™ EXACTLINE LASER GUIDE well as a knowledge of the project you are attempting. Before  For more accurate cuts, an Exactline™ laser guide is  use of this product, familiarize yourself with all operating  included with your mite
                    
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                        FEATURES MITER LOCK LEVER SWITCH TRIGGER See Figure 4. The miter lock lever securely locks the saw at the desired  miter angle. The saw will not start until you depress the switch lock with  your thumb then squeeze the switch trigger. To prevent MITER SCALE unauthorized use of the compound miter saw, disconnect  ° ° ° The miter scale has index points provided at 0 , 15 , 22.5 ,  it from the power supply and lock the switch in the OFF  ° ° ° 31.6 , 45 , and 60. position. To lock the switch, insta
                    
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                        TOOLS NEEDED The following tools (not included) are needed for making adjustments or installing the blade: RATCHET COMBINATION WRENCH, 12 mm SOCKET, 19 mm PHILLIPS SCREWDRIVER COMBINATION SQUARE FRAMING SQUARE Fig. 6 13                                                                                                                                                                                                                                                                                         
                    
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                        LOOSE PARTS The following items are included with your Compound Miter Saw:  Dust Bag  Blade Wrench ™  Dust Bag Frame  Exactline Laser Guide  Dust Guide  Flat Head Socket Cap Screw  Work Clamp  Operator’s Manual (not shown) DUST BAG WORK CLAMP DUST BAG  BLADE  ™  EXACTLINE FRAME WRENCH LASER GUIDE FLAT HEAD  SOCKET CAP  DUST  SCREW GUIDE Fig. 7   WARNING: The use of attachments or accessories not listed in this manual might be hazardous and could cause serious  personal injury. 14        
                    
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                        ASSEMBLY UNPACKING  WARNING: This product requires assembly.  Carefully lift saw from the carton by the carrying handle Do not connect to power supply until assembly is  and the saw base, and place it on a level work surface. complete. Failure to comply could result in acciden- tal starting and possible serious personal injury.  NOTE: This tool is heavy. To avoid back injury, lift with  your legs, not your back, and get help when needed.  This saw has been shipped with the saw arm secured in  
                    
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                        ASSEMBLY NOTE: Many of the illustrations in this manual show only  DEPTH CONTROL  portions of the compound miter saw. This is intentional KNOB SAW ARM DEPTH  so that we can clearly show points being made in the GUIDE illustrations. Never operate the saw without all guards  securely in place and in good operating condition. LOCKING / UNLOCKING THE SAW ARM See Figure 9. When locking and unlocking the saw arm, it is not necessary  to loosen the depth control knob. To unlock and raise the saw arm: 
                    
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                        ASSEMBLY INSTALLING THE DUST BAG See Figure 11.  Squeeze the metal clips on the dust bag, then slide the  metal ring over the end of the dust guide. Position the  metal ring so it is between the two molded rings on the  dust guide. Release the dust bag clips. DUST BAG FRAME   Snap the frame onto the slide bar by squeezing the dust  bag frame, then pushing it down over the slide bar.  Insert the dust guide inside the exhaust port in the upper  blade guard.  Slip the dust bag over the frame wi
                    
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                        ASSEMBLY SCREW  WARNING: Make sure the spindle lock button is not engaged  before reconnecting saw to power source. Never  engage spindle lock button when blade is rotat- LOWER ing. BLADE  GUARD SCREW INSTALLING / REPLACING THE BLADE See Figure 13. BLADE  WARNING: BOLT  BLADE COVER A 12 in. blade is the maximum blade capacity of  the saw. Never use a blade that is too thick to allow  OUTER BLADE  outer blade washer to engage with the flats on the  WASHER spindle. Larger blades will come in conta
                    
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                        ASSEMBLY ™ SCREW MOUNTING THE EXACTLINE LASER GUIDE LOWER See Figure 14. BLADE  GUARD  Unplug the saw.  Remove hex bolt, washer, and outer blade washer. Store  BLADE for future use. BOLT COVER  Make sure inner blade washer is in place before BLADE  positioning saw blade on the spindle of the saw.  NOTE: The laser guide replaces the outer blade washer.  Place the laser guide onto the spindle, aligning the double  TO “D” flats in the laser guide with the flats on the spindle. LOOSEN  Position
                    
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                        ASSEMBLY REMOVING / REPLACING THE ZERO CLEAR- ANCE THROAT PLATE See Figure 16. When squaring the saw blade, it may be necessary to  move the throat plate away from the blade. Once the saw’s  alignment has been confirmed, return the throat plate to its  original position. Never operate the saw without a throat  plate installed.  Unplug the saw.  Using the blade wrench provided, loosen the screws  BLADE   securing the right side of the zero clearance throat WRENCH plate.  Slide the throat plate