RIDGID R4121 Operator'S Manual Download Page 4

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GENERAL SAFETY RULES

 

NEVER USE IN AN EXPLOSIVE ATMOSPHERE. 

Normal 

sparking of the motor could ignite fumes.

 

INSPECT TOOL CORDS PERIODICALLY.

 If  damaged, 

have  repaired  by  a  qualified  service  technician  at  an 
authorized service facility. The conductor with insulation 
having an outer surface that is green with or without yellow 
stripes is the equipment-grounding conductor. If repair 
or replacement of the electric cord or plug is necessary, 
do not connect the equipment-grounding conductor to a 
live terminal. Repair or replace a damaged or worn cord 
immediately. Stay constantly aware of cord location and 
keep it well away from the rotating blade.

 

INSPECT  EXTENSION  CORDS  PERIODICALLY 

and 

replace if damaged.

 

POLARIZED PLUGS. 

To reduce the risk of electric shock, 

this tool has a polarized plug (one blade is wider than 
the other). This plug will fit in a polarized outlet only one 
way. If the plug does not fit fully in the outlet, reverse the 
plug. If it still does not fit, contact a qualified electrician 
to install the proper outlet. Do not change the plug in any 
way.

 

KEEP TOOL DRY, CLEAN, AND FREE FROM OIL AND 
GREASE. 

Always use a clean cloth when cleaning. Never 

use brake fluids, gasoline, petroleum-based products, or 
any solvents to clean tool.

 

STAY ALERT AND EXERCISE CONTROL. 

Watch what 

you are doing and use common sense. Do not operate 
tool when you are tired. Do not rush.

 

DO NOT USE TOOL IF SWITCH DOES NOT TURN IT 
ON AND OFF.

 Have defective switches replaced by an 

authorized service center.

 

USE ONLY CORRECT BLADES. Do not

 use blades with 

incorrect size holes. Never use blade washers or blade 
bolts that are defective or incorrect. The maximum blade 
capacity of the saw is 12 in.

 

BEFORE  MAKING  A  CUT,  BE  SURE  ALL  ADJUST-
MENTS ARE SECURE.

 

BE SURE BLADE PATH IS FREE OF NAILS. 

Inspect for 

and remove all nails from lumber before cutting.

 

NEVER TOUCH BLADE 

or other  moving parts during 

use.

 

NEVER  START  A  TOOL  WHEN  ANY  ROTATING 

  COMPONENT IS IN CONTACT WITH THE WORKPIECE.

 

DO  NOT  OPERATE  A  TOOL  WHILE  UNDER  THE 

  INFLUENCE  OF  DRUGS,  ALCOHOL,  OR  ANY
  MEDICATION.

 

WHEN SERVICING

 use only identical replacement parts. 

Use  of  any  other  parts  may  create  a  hazard  or  cause 
product damage.

 

USE ONLY RECOMMENDED ACCESSORIES 

listed 

in this manual or addendums. Use of accessories that 

are  not  listed  may  cause  the  risk  of  personal  injury. 

Instructions for safe use of accessories are included 

with the accessory. 

 

DOUBLE CHECK ALL SETUPS.

 Make sure blade is 

tight and not making contact with saw or workpiece 

before connecting to power supply.

SPECIFIC SAFETY RULES

 

FIRMLY CLAMP OR BOLT

 the tool to a workbench or 

table at approximately hip height.

 

KEEP HANDS AWAY FROM CUTTING AREA.

 Do not 

reach underneath work or in blade cutting path with your 
hands and fingers for any reason. Always turn the power off.

 

ALWAYS SUPPORT LONG WORKPIECES 

while cutting 

to minimize risk of blade pinching and kickback. Saw may 
slip, walk, or slide while cutting long or heavy boards.

 

ALWAYS USE A CLAMP

 to secure the workpiece when 

possible.

 

BE SURE THE BLADE CLEARS THE WORKPIECE. 

Never 

start the saw with the blade touching the workpiece. Allow 
motor to come up to full speed before starting cut.

 

MAKE SURE THE MITER TABLE AND SAW ARM (BEVEL 
FUNCTION)  ARE  LOCKED  IN  POSITION  BEFORE

  OPERATING YOUR SAW.

 Lock the miter table by securely 

tightening the miter lock lever. Lock the saw arm (bevel 
function) by securely tightening the bevel lock lever.

 

USE THIS SAW TO CUT WOOD, WOOD PRODUCTS, 
AND SOME PLASTICS ONLY. DO NOT CUT METALS, 
CERAMICS OR MASONRY PRODUCTS.

  BEFORE MOVING THE SAW,

 unplug the saw then lock 

the miter, bevel, and saw head positions.

 

NEVER USE A LENGTH STOP ON THE FREE SCRAP 
END OF A CLAMPED WORKPIECE. NEVER 

hold onto 

or bind the free scrap end of the workpiece in any opera-
tion. 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.

 

NEVER 

cut  more  than  one  piece  at  a  time. 

DO  NOT 

STACK

 more than one workpiece on the saw table at a 

time.

 

NEVER  PERFORM  ANY  OPERATION  FREEHAND.

 

Always place the workpiece to be cut on the miter table 
and position it firmly against the fence as a backstop. 
Always use the fence.

Summary of Contents for R4121

Page 1: ...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 mu...

Page 2: ...13 Loose Parts 14 Assembly 15 22 Operation 23 33 Adjustments 33 Maintenance 34 36 Accessories 36 Warranty 37 Parts Ordering Service 38 INTRODUCTION This tool has many features for making its use more...

Page 3: ...SAFETY GLASSES WITH SIDE SHIELDS Everyday eyeglasses have only impact resistant lenses they are NOT safety glasses GENERAL SAFETY RULES SECURE WORK Use clamps or a vise to hold work when practical it...

Page 4: ...ILE UNDER THE INFLUENCE OF DRUGS ALCOHOL OR ANY MEDICATION WHENSERVICINGuse only identical replacement parts Use of any other parts may create a hazard or cause product damage USE ONLY RECOMMENDED ACC...

Page 5: ...r other reproductive harm Some examples of these chemicals are lead from lead based paints crystalline silica from bricks and cement and other masonry products and arsenic and chromium from chemically...

Page 6: ...peed orbits etc per minute Do not expose to rain or use in damp locations To reduce the risk of injury user must read and understand operator s manual before using this product Eye Protection Precauti...

Page 7: ...which if not avoided may result in minor or moderate injury Without Safety Alert Symbol Indicates a situation that may result in property damage DANGER WARNING CAUTION The operation of any power tool...

Page 8: ...ble check the power supply EXTENSION CORDS When using a power tool at a considerable distance from a power source be sure to use an extension cord that has the capacity to handle the current the produ...

Page 9: ...dropped into the blade or being placed inadvertently in contact with the blade Workpiece or Material The item on which the operation is being done Worktable Surface where the workpiece rests while pe...

Page 10: ...LATE MITER SCALE MITER LOCK LEVER MITER TABLE SAW BASE SLIDING MITER FENCE BEVEL LOCK LEVER FENCE SCREW CARRYING HANDLE BEVEL STOP PIN WORK CLAMP MITER THUMBWHEEL Cutting Capacity with Miter at 0 Beve...

Page 11: ...K LEVER The bevel lock lever securely locks your compound miter saw at desired bevel angles Pulling the lever forward will release the saw allowing the blade to be tilted either left or right for beve...

Page 12: ...s may require that the sliding fence be removed completely to avoid interference between the fence and the blade Loosen the fence screw before attempting to slide the fences or lift them for removal O...

Page 13: ...13 The following tools not included are needed for making adjustments or installing the blade COMBINATION SQUARE TOOLS NEEDED Fig 6 COMBINATION WRENCH 12 mm FRAMING SQUARE PHILLIPS SCREWDRIVER...

Page 14: ...ol Hex Key 4 mm Hex Key 5 mm Hex Key 1 16 in Blade Operator s Manual not shown Fig 7 WARNING The use of attachments or accessories not listed in this manual might be hazardous and could cause serious...

Page 15: ...teration or modification is misuse and could result in a hazardous condition leading to possible serious personal injury WARNING Do not connect to power supply until assembly is complete Failure to co...

Page 16: ...erfere with the operation of the blade guard assembly Always make sure there is no interfer ence with the blade guard prior to beginning any cutting operation to reduce the risk of serious personal in...

Page 17: ...blade washer and the laser guide or outer blade washer where they contact the blade WARNING If inner blade washer has been removed replace it before placing blade on spindle Failure to do so could ca...

Page 18: ...ing 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 This broken line will let you see your mark and...

Page 19: ...t of the miter lock lever is required To adjust Unplug the saw Lift the miter lock lever to unlock Locate the set screw under the miter lock lever Using a hex key adjust the set screw until the proper...

Page 20: ...Place one leg of the square against the fence Slide the other leg of the square against the flat part of saw blade NOTE Make sure that the square contacts the flat part of the saw blade not the blade...

Page 21: ...een made push the bevel lock lever back to relock the bevel Recheck and readjust as needed ADJUSTING THE BEVEL PIVOT See Figure 23 The saw should smoothly pivot when the bevel lock lever is unlocked a...

Page 22: ...he saw blade should be parallel as shown in figure 25 If the top or bottom of the saw blade angles away from the square as shown in figures 26 and 27 adjustments are needed Using a hex key loosen the...

Page 23: ...ng can result in serious personal injury WARNING To avoid serious personal injury always tighten the miter lock lever and the bevel lock lever securely before making a cut Failure to do so could resul...

Page 24: ...ired angle on the miter scale NOTE You can quickly locate 0 15 22 5 31 6 and 45 left or right by spinning the miter thumbwheel up The lock plate will seat itself in one of the index points located in...

Page 25: ...is warped place the convex side against the fence If the concave edge of a board is placed against the fence the board could collapse on the blade at the end of the cut jamming the blade See Figures 4...

Page 26: ...5 31 6 and 45 left or right by spinning the miter thumbwheel up The lock plate will seat itself in one of the index points located in the miter table base Push the miter lock lever down to lock the mi...

Page 27: ...Use the work clamp or a C clamp to secure the workpiece NOTE When making a compound miter cut as shown in figure 34 it may be necessary to adjust or remove the sliding miter fence to insure proper cle...

Page 28: ...el 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 Drill holes t...

Page 29: ...2 B 11 60 M 28 48 B 9 85 M 24 35 B 8 53 M 21 27 B 7 52 M 18 88 B 6 72 M 16 98 B 6 07 M 33 36 B 14 38 M 27 62 B 12 20 M 23 56 B 10 57 M 20 58 B 9 31 M 18 26 B 8 31 M 16 41 B 7 50 M 32 18 B 17 09 M 26 5...

Page 30: ...62 33 86 31 17 33 53 30 73 33 19 30 30 32 85 29 86 32 51 29 43 32 17 29 00 31 82 28 58 31 48 28 16 31 13 27 74 30 78 27 32 30 43 26 91 30 08 26 50 29 73 26 09 29 38 25 69 29 02 25 29 28 67 24 89 28 3...

Page 31: ...ogether equal exactly 90 Most crown molding has a top rear angle the section that fits flat against the ceiling of 52 and a bottom rear angle the section that fits flat against the wall of 38 LAYING M...

Page 32: ...wood NOTE Keep nails away from the area around the blade cutting path Securely reattach the jig to the miter fence Make a full 45 left miter cut and a 45 right miter cut through the completed jig Beve...

Page 33: ...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 Fig 40 RIGHT WRONG WARNING...

Page 34: ...NG Before performing any adjustment make sure the tool is unplugged from the power supply Failure to heed this warning could result in serious personal injury TO ADJUST THE LASER GUIDE See Figure 42 N...

Page 35: ...ely Do not overtighten CHANGING THE BATTERIES See Figure 44 Unplug the saw Rotate and hold lower blade guard up Using the hex key 1 16 in provided loosen the screw then separate the cover from the las...

Page 36: ...tension Using a phillips screwdriver remove the screws holding the drive pulley cover on the left side of the saw arm Lift off the cover Remove the screws holding the carrying handle on the saw arm th...

Page 37: ...at www ridgid com When requesting warranty service you must present the original dated sales receipt The authorized service center will repair any faulty workmanship and either repair or replace any p...

Page 38: ...er nearest you please call 1 866 539 1710 or visit us online at www ridgid com The model number of this tool is found on a plate attached to the motor housing Please record the serial number in the sp...

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