RIDGID R4121 Operator's Manual
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RIDGID R4121 Operator's Manual

12 in. compound miter saw with adjustable laser double insulated
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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
SAVE THIS MANUAL FOR FUTURE REFERENCE
OPERATOR'S MANUAL
12 in. COMPOUND MITER SAW
WITH ADJUSTABLE LASER
Double Insulated
R4121
product.
®

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Summary of Contents for RIDGID R4121

  • Page 1 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.

  • Page 2: Table Of Contents

    TABLE OF CONTENTS Introduction ... 2  General Safety Rules ...3-4  Specific Safety Rules ...4-5   Symbols ...6-7 Electrical ... 8  Glossary of Terms ... 9  Features ...10-12  Tools Needed ... 13   Loose Parts ... 14 Assembly ...15-22 ...

  • Page 3: General Safety Rules

    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.

  • Page 4: Specific Safety Rules

    If a work clamp and length stop are used together, they must both be installed on the same side of the saw table to prevent the saw from catching the loose end and kicking up.

  • Page 5: Specific Safety Rules

     ALWAYS carry the tool only by the carrying handles.  AVOID direct eye exposure when using the laser guide.  THIS SAW CAN TIP OVER if the saw head is released suddenly and the saw is not secured to a work surface.

  • Page 6: Symbols

    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...
  • Page 7 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. ®...

  • Page 8: Electrical

    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.

  • Page 9: Glossary Of Terms

    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.

  • Page 10: Features

    FEATURES PRODUCT SPECIFICATIONS Blade Diameter ... 12 in. Arbor Hole ... 1 in. No Load Speed ...4,000 r/min. (RPM) Input ... 120 V, 60 Hz, AC Only, 15 Amps DUST BEVEL STOP SLIDING MITER FENCE FENCE SCREW WORK CLAMP Cutting Capacity with Miter at 0°/Bevel 0°: Maximum nominal lumber sizes: ...2 x 10 Cutting Capacity with Miter at 45°/Bevel 0°: Maximum nominal lumber sizes: ...2 x 6...

  • Page 11: Electric Brake

    12 IN. BLADE A 12 in. carbide tooth blade is included with your compound miter saw. It will cut materials up to 9-1/4 in. wide, depending upon the angle at which the cut is being made. 15 AMP MOTOR This saw has a powerful 15 amp motor with sufficient power to handle tough cutting jobs.

  • Page 12: Features

    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. SLIDING MITER FENCES The sliding miter fences provided with this saw help hold the workpiece securely when making most cuts.

  • Page 13: Tools Needed

    TOOLS NEEDED The following tools (not included) are needed for making adjustments or installing the blade: COMBINATION WRENCH, 12 mm PHILLIPS SCREWDRIVER FRAMING SQUARE COMBINATION SQUARE Fig. 6...

  • Page 14: Loose Parts

    LOOSE PARTS The following items are included with your miter saw:  Dust Bag  Dust Guide  Work Clamp  Blade Washer  Blade Bolt  Blade Wrench INSTALLED ON TOOL BOLT BLADE WASHER BLADE BOLT WORK CLAMP DUST BAG...

  • Page 15: Assembly

    This product requires assembly.  Carefully lift saw from the carton by the carrying handle and the saw base, and place it on a level work surface. NOTE: This tool is heavy. To avoid back injury, lift with your legs, not your back, and get help when needed.
  • Page 16 DUST BAG See Figure 10. A dust bag is provided for use on your miter saw. It fits over a dust guide or exhaust port. Then, squeeze the two metal clips to open the mouth of the bag and slide it on the exhaust port.

  • Page 17: Installing The Blade

    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.
  • Page 18 Next, adjust the bevel angle (left) to 48°, turn your saw on and allow the blade to reach full speed, then carefully make another cut through the zero clearance throat plate.
  • Page 19 ADJUSTING THE MITER LOCK LEVER See Figures 14 - 15. Prior to squaring the saw blade to the fence, check the miter lock lever for proper adjustment. The blade must be set at an “unindexed” miter position other than 0˚, 15˚, 22.5˚, 31.6˚, and 45˚...
  • Page 20  The edge of the square and the saw blade should be parallel as shown in figure 17.  If the front or back edge of the saw blade angles away from the square as shown in figures 18 and 19, adjust- ments are needed.

  • Page 21: Travel Pivot Adjustment

     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.

  • Page 22: Assembly

    SQUARING THE BLADE TO THE MITER TABLE See Figures 24 - 27.  Unplug the saw.  Pull the saw arm all the way down and lock in transport position.  Lift the miter lock lever to unlock. Rotate the miter table and set the saw at 0 miter.

  • Page 23: Operation

     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.
  • Page 24 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.
  • Page 25  Push the miter lock lever down to lock the miter table.  Pull the bevel lock lever forward, rotate the bevel stop pin to release, and move the saw arm to the left or right to the desired bevel angle.
  • Page 26 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.

  • Page 27: Clamping Wide Workpieces

    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.
  • Page 28 0˚. When making a bevel cut, the auxiliary fence MUST be removed. To attach the auxiliary fence to the saw:  Place the wood against the miter fence and mark the hole location from behind the fence using a pencil.

  • Page 29: Cutting Compound Miters

    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.
  • Page 30 CUTTING CROWN MOLDING The following chart illustrates the miter and bevel angle settings of the miter saw for both 52˚/38˚ and 45˚/45˚ crown molding, when the angle between the walls run from 67˚ to 146˚. With the crown molding laying flat, cut at the following angles: WALL 38˚...

  • Page 31: Cutting Crown Molding

    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.
  • Page 32 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.
  • Page 33 OPERATION CUTTING WARPED MATERIAL See Figures 40 - 41. When cutting warped material, always make sure it is positioned on the miter table with the convex side against the fence as shown in figure 40. If the warped material is positioned the wrong way as shown in figure 40, it will pinch the blade near the completion of the cut.

  • Page 34: Adjustments

     Use the work clamp or a C-clamp to secure a piece of scrap wood.  Plug the saw into the power source and make a slight cut to score the wood.  Release the switch trigger and allow the saw blade to stop rotating before raising the blade.
  • Page 35 Proceed as follows when replacement is required:  Unplug the saw. 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.

  • Page 36: Accessories

    NOTE: Cord must never touch the belt. To replace the belt: Take it in to an authorized service center for RIDGID You may obtain the location of the authorized service center nearest you by calling (toll free) 1-866-539-1710 or by logging on to the RIDGID website at www.ridgid.com.

  • Page 37: Warranty

    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.

  • Page 38: Parts Ordering/Service

    Double Insulated R4121 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.

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