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.
GENERAL SAFETY RULES WARNING: Read and understand all instructions. Failure to follow all instructions listed below, could result in electric shock, fire and/or serious personal injury. READ ALL INSTRUCTIONS KNOW YOUR POWER TOOL. Read the operator’s manual carefully. Learn the applications and limitations as well as the specific potential hazards related to this tool.
MAKE SLIDING CUTS by pushing the saw blade down on top of the workpiece then sliding it back toward the rear of the saw. DO NOT pull the saw toward you while making a cut. ALWAYS carry the tool only by the carrying handles.
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 Volts Amperes Hertz Watt Minutes Alternating Current Direct Current...
To avoid serious personal injury, do not attempt to use this product until you read thoroughly and un- derstand completely the operator’s manual. If you do not understand the warnings and instructions in the operator’s manual, do not use this product. Call RIDGID customer service for assistance. ®...
ELECTRICAL DOUBLE INSULATION Double insulation is a concept in safety in electric power tools, which eliminates the need for the usual three-wire grounded power cord. All exposed metal parts are isolated from the internal metal motor components with protect- ing insulation. Double insulated tools do not need to be grounded.
The area over, under, behind, or in front of the blade. As it applies to the workpiece, that area which will be or has been cut by the blade. The distance that the tip of the saw blade tooth is bent (or set) outward from the face of the blade. Snipe (planers) Depression made at either end of a workpiece by cutter blades when the workpiece is not properly supported.
DEPTH GUIDE See Figure 2. The depth guide is used for locking the saw arm in the down position or as a guide for limiting downward movement of the saw arm. NOTE: Controlling depth of cut is necessary when rough cutting a dado.
SELF-RETRACTING LOWER BLADE GUARD The lower blade guard is made of shock-resistant, see- through plastic that provides protection from each side of the blade. It retracts over the upper blade guard as the saw is lowered into the workpiece. SLIDE BAR...
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...
LOOSE PARTS The following items are included with your miter saw: Dust Bag Dust Bag Frame Dust Guide Work Clamp DUST BAG DUST BAG FRAME FLAT HEAD SOCKET CAP SCREW WARNING: The use of attachments or accessories not listed in this manual might be hazardous and could cause serious personal injury.
This saw has been shipped with the saw arm secured in the down position. To release the saw arm, push down on the top of the saw arm, cut the tie-wrap, and pull out on the depth guide. Lift the saw arm by the handle. Hand pressure should remain on the saw arm to prevent sudden rise upon release of the tie wrap and/or depth guide.
The work clamp provides greater control by clamping the workpiece to the miter table. It also helps to prevent the workpiece from creeping toward the saw blade. This is very helpful when cutting compound miters. Depending on the cutting operation and the size of the workpiece, it may be necessary to use a C-clamp instead of the work clamp to secure the workpiece prior to making the cut.
WARNING: A 12 in. blade is the maximum blade capacity of the saw. Never use a blade that is too thick to allow outer blade washer to engage with the flats on the spindle. Larger blades will come in contact with the blade guards, while thicker blades will prevent the hex bolt from securing the blade on the spindle.
See Figure 14. The laser guide will generate a laser line on the work surface when the saw blade is spinning. The laser line will appear as a broken line on the workpiece when the blade assembly is in the uppermost position and the motor switch is activated.
If adjustment is required: Unplug the saw. With the miter at 0˚ and the bevel at 0˚, lock the saw into the transport position. Loosen the jam nuts on the two top and two bottom gib screws as shown.
Loosen the screws holding the throat plate and move the throat plate as far away from the saw blade as possible. Pull the saw arm all the way down and lock in transport position. Lift the miter lock lever.
The edge of the square and the saw blade should be parallel as shown in figure 20. If the front or back edge of the saw blade angles away from the square as shown in figures 21 and 22, adjust- ments are needed.
The saw arm should rise completely to the up position by itself. If the saw arm does not raise by itself or if there is play in the pivot joints, have saw repaired at the nearest authorized service center.
Cross cutting wide workpieces. NOTE: The blade provided is fine for most wood cutting operations, but for fine joinery cuts or cutting plastic, use one of the accessory blades available from the RIDGID dealer. WARNING: Before starting any cutting operation, clamp or bolt the miter saw to a workbench.
Turn the saw on (let blade reach maximum speed), then push the blade down on top of the workpiece then back toward the rear of the saw to make a cut. Cuts are made by: (1) pushing the saw blade away from you and toward the bevel scale at the back of the saw stopping when the full rear position has been reached after each cut.
Use the work clamp or a C-clamp to secure the workpiece when possible. Before turning on the saw, perform a dry run of the cut- ting operation to make sure that no problems will occur when the cut is made.
Long workpieces need extra supports. Supports should be placed along the workpiece so it does not sag. The support should let the workpiece lay flat on the base of the saw and miter table during the cutting operation. Use the work clamp or a C-clamp to secure the workpiece.
Using the marks on the depth guide, set the blade to the correct cutting depth. With the saw off, pull the saw arm forward. Turn the saw on (let blade reach maximum speed), then push the blade down on top of the workpiece then back toward the rear of the saw to make a cut.
OPERATION CUTTING COMPOUND MITERS To aid in making the correct settings, the compound angle setting chart below has been provided. Since compound cuts are the most difficult to accurately obtain, trial cuts should be made in scrap material, and much thought and planning made, prior to making your required cut.
OPERATION CUTTING CROWN MOLDING The compound miter saw does an excellent job of cutting crown molding. In general, compound miter saws do a better job of cutting crown molding than any other tool made. In order to fit properly, crown molding must be compound mitered with extreme accuracy.
23 in. long, place the wood on the miter table against the miter fence. From the back side of the saw, use a pencil to mark the wood through the holes in the miter fences. Drill holes through the wood then countersink the holes to accept flat head screws.
Light oil or a pressurized light spray oil to the torsion spring. BRUSH REPLACEMENT See Figure 50. The saw has externally accessible brush assemblies that should be periodically checked for wear. Proceed as follows when replacement is required: Unplug the saw.
MAINTENANCE WARNING: Failure to unplug the saw could result in accidental starting causing serious injury. Remove brush cap with a screwdriver. Brush assembly is spring loaded and will pop out when you remove brush cap. Remove brush assembly.
ACCESSORIES Look for these accessories at The Home Depot. AC9940 ... Miter Saw Utility Vehicle WARNING: Current attachments and accessories available for use with this tool are listed above. Do not use any attachments or accessories not recommended by the manufacturer of this tool. The use of attachments or accessories not recommended can result in serious personal injury.
Tools covers all defects in workmanship or materials and nor- mal wear items such as brushes, chucks, motors, switches, cords, gears and even cordless batteries in this RIDGID tool for three years following the purchase date of the tool. Warranties for other RIDGID products may vary.
Double Insulated MS1290LZA CUSTOMER SERVICE INFORMATION For parts or service, contact your nearest RIDGID authorized service center. Be sure to provide all relevant information when you call or visit. For the location of the authorized service center nearest you, please call 1-866-539-1710 or visit us online at www.ridgid.com.