Instruction/ maintenance manual of the product 137.21194 Craftsman
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1 1 Operator’s Manual 7 - 1 / 4 i n . S L I D I N G C O M P O U N D M I T E R S A W W I T H L A S E R T R A C ® M o d e l N o . 1 3 7 . 2 1 1 9 4 0 CAUTION: Before using this Miter Saw, read this m.
2 3 2 3 SECTION PAGE Warranty ......................................................................................... 2 Product Specifications .................................................................... 3 Symbols...........................
2 3 2 3 ROTATING TABLE: Diameter............................................................................ 9-1/32 in. Miter Detent Stops ............................................................ 0 , 1 5 , 2 2 . 5 , 3 1 . 6 , 4 5 º R & L Bevel Positive Stops .
4 5 4 5 WARNING ICONS Your power tool and its Operator’s Manual may contain “WARNING ICONS” (a picture symbol intended to alert you to, and/or instruct you how to avoid, a potentially hazardous condition). Understanding and heeding these symbols will help you operate your tool better and safer.
4 5 4 5 GENERAL SAFETY INSTRUCTIONS BEFORE USING THIS POWER TOOL Safety is a combination of common sense, staying alert and knowing how to use your power tool. CAUTION To avoid mistakes that could cause seriou s injury , do not plug th e tool in until you have read and understood the following.
6 7 6 7 and any other conditions that may affect its operation. A guard or other part that is damaged should be properly repaired or replaced. 20. NEVER LEAVE THE TOOL RUNNING UNATTENDED. TURN THE POWER “OFF”. Do not walk away from a running tool until the blade comes to a complete stop and the tool is unplugged from the power source.
6 7 6 7 SPECIFIC SAFETY INSTRUCTIONS FOR THIS COMPOUND MITER SAW 1. DO NOT operate the miter saw until it is completely assembled and installed according to these instructions. 2. IF YOU ARE NOT thoroughly familiar with the operation of miter saws, seek guidance from your supervisor, instructor or other qualified person.
8 9 8 9 21. NEVER cut small pieces. If the workpiece being cut would cause your hand or fingers to be within 6-3/4 in. of the saw blade the workpiece is too small. 22. PROVIDE adequate support to the sides of the saw table for long work pieces. 23. NEVER use the miter saw in an area with flammable liquids or gases.
8 9 8 9 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. Double insulation does not take the place of normal safety precautions when operating this tool.
10 11 10 11 now be started and the cut finished. 4. FUSES may “blow” or circuit breakers may trip frequently if: a. MOTOR is overloaded – overloading can occur if you f eed too rapidly or make too many start/stops in a short time. b. LINE VOLTAGE is more than 10% above or below the nameplate voltage rating.
10 11 10 11 RECOMMENDED ACCESSORIES ● Use only accessories recommended for this miter saw. Follow instructions that accompany accessories. Use of improper accessories may cause hazards. ● The use of any cutting tool except 7-1/4 i n. saw b lades wh ich meet the requirements under recommended accessories is prohibited.
12 13 12 13 COMBINATION SQUARE MUST BE TRUE Should not gap or overlap when square is flipped over (see dotted figure). Should not gap or overlap when square flipped over (see dotted figure). Draw light line on board al ong this edge . Straight edge or a 3/4 in.
12 13 12 13 UNPACKING YOUR MITER SAW To avoid injury from unexpected starting or electrical shock, do not plug the power cord into a source of power during unpacking and assembly. This cord must remain unplugged whenever you are working on the saw. 1.
14 15 14 15 KNOW YOUR SLIDING COMPOUND MITER SAW Upper blade guard Switch handle ON/OFF trigger switch Lower blade guard Base Miter handle Bevel lock handle Mounting hole Turntable Hold-down clamp Bev.
14 15 14 15 AMPERAGE (AMPS) – A measure of the flow of electric current. Higher ratings generally means the tool is suited for heavier use. ARBOR LOCK – Allows the user to keep the blade from rotating while tightening or loosening the arbor bolt during blade replacement or removal.
16 17 16 17 POSITIVE STOP LOCKING LEVER – Locks the mit er saw at a preset po sitive stop for the desired miter angle. SWITCH HANDLE – The switch handle contains the trigger switch and the laser on/off switch. The blade is lowered into the workpiece by pushing down on the handle.
16 17 16 17 To avoid injury, do not connect this miter saw to the power source until it is completely assembled and adjusted, and you have read and understood this Operator’s Manual. INSTALLING THE SUPPORT BRACKET (FIG. A) 1 . Place the su ppor t bracket ( 1 ) in front of the miter saw as shown.
18 19 18 19 RELEA SING C UTTING HEAD (F IG. G) To avoid injury and damage to the saw, transport or store the miter saw with the cutting head locked in the down position. Never use the hold down latch to hold the cutting head in a down position for cutting operations.
18 19 18 19 NOTE: Your miter saw was adjusted at the factory. However, during shipment slight m isalignment may have oc curred. Check the following settings and adjust if necessary prior to using this miter saw. REMOVING AND INSTALLING THE TABLE INSERT (FIG.
20 21 20 21 REMOVING OR INSTALLING THE BLADE Removing Blade (Fig. K, L, M) ● To avoid injury from an accidental start, make sure the switch is in the OFF position and plug is not connected to the power source outlet. ● Only use a 7-1/4 inch diameter blade.
20 21 20 21 INSTALLING BLADE (FIG. K, L, M) Un-plug the miter saw before changing/installing the blade. 1. Install a 7-1/4 in. blade with a 5/8 in. arbor making sure the rotation arrow on the blade matches the clockwise rotation arrow on the upper guard, and the blade teeth are pointing downward.
22 23 22 23 saw must be connected to the power source and the laser on/off switch must be turned on for the laser line to show. AVOID DIRECT EYE CONTACT ● Laser is radiated when laser guide is turned on. Avoid direct eye contact. Always un-plug the miter saw from power source before making any adjustments.
22 23 22 23 BEVEL STOP ADJUSTMENTS (FIG. O, P, Q) To avoid injury from unexpected starting or electrical shock, make sure the trigger is released and remove the power cord from the power source. 90°(0°) Bevel adjustment (Fig. O) 1. Loosen bevel lock handle (1) and tilt the cutting arm completely to the right.
24 25 24 25 bevel angle adjustment bolt (10) and use a 10 mm wrench to adjust the stop bolt (10) depth in or out to increase or decrease the bevel angle. 4. Tilt the cutting arm to the left to 45° bevel and recheck for alignment. 5. Repeat steps 1 through 4 until the blade is at 45° to the miter table.
24 25 24 25 Fig. S ADJUSTING CUTTING DEPTH (FIG. T) The maximum depth travel of the cutting head was set at the factory. Check to see that the blade does not extend more than 1/4 in. below the table insert, and does not touch the control arm throat or any part of the base or table.
26 27 26 27 SAFETY INST RUCTIONS FOR BAS IC SAW OPERATION BEFORE USING THE MITER SAW To avoid mistakes that could cause serious, permanent injury, do not plug the tool in until the following steps are completed: ● Completely assemble and adjust the saw, following the instructions.
26 27 26 27 CAUTION: This machine is not designed for cutting masonry, masonry products, ferrous metals (steel, iron, and iron-based metals.) Use this miter saw to cut only wood, wood-like products, or non- ferrous metals. Other material may shatter, bind the blade, or create other dangers.
28 29 28 29 “no hands zone” area marked on the saws table. ● When cutting odd shaped workpieces, plan your work so it will not bind in the blade and cause possib le injury. Molding, for exam ple, must lie flat or be held by a fixture or jig that will not let it move when cut.
28 29 28 29 BODY AND HAND POSITION (FIG. U) Never place hands near the cutting area. Proper positioning of your body and hands when operating the miter saw will make cutting easier and safer. Keep children away. Keep all visitors at a safe distance from the miter saw.
30 31 30 31 Fig. V SLIDING CARRIAGE SYSTEM (FIG. W) To reduce the risk of injury, return carriage to the full rear position after each crosscut operation. 1. For a chop cutting operations on small workpieces, slide the cutting head assembly completely toward the rear of the unit and tighten the carriage lock knob (1).
30 31 30 31 WARNING ! SLIDE CUTTING WIDE BOARDS UP TO 8 in. WIDE (FIG. AA) To avoid injury: ● Never pull the cutting head assembly and spinning blade toward you during the cut. The blade may try to climb up on the top of th e workpiece, causing the cutting assembly and spinning blade to kick back forcefully.
32 33 32 33 WARNING ! ROUGH CUTTING A DADO (FIG. CC) DO NOT USE A DADO BLADE, use only the standard saw blade for this operation. 1. Mark lines identifying the width and depth of the desired cut on CUTTING BOWED MATERIAL (FIG.
32 33 32 33 Fig. DD AUXILIARY WOOD FENCE (FIG. EE) When making multiple or repetitive cuts that result in cut-off pieces of one inch or less, it is possible for the saw blade to catch the cut-off piece and throw it out of the saw or into the blade guard and housing, possibly causing damage or injury.
34 35 34 35 angles that, when added together, 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°.
34 35 34 35 Bevel/Miter Settings KEY BEVEL SETTING MITER SETTING TYPE OF CUT Inside corner-Left side IL 33.9° 31.6° Right 1. Position top of molding against fence. 2. Miter table set at RIGHT 31.6°. 3. LEFT side is finished piece. Inside corner-Right side IR 33.
36 37 36 37 CROWN MOLDING CHART Compound Miter saw Miter and bevel Angle settings Wall to Crown Molding Angle 52 /38 ° Cr ow n M old ing 45 /45 ° Cr ow n M old ing Angle Between Walls Miter Setting Bevel Setting Miter Setting Bevel Setting 67 42.93 41.
36 37 36 37 NOTE: To reinstall the same brushes, first make sure the brushes go back in the way they came out. This will avoid a break-in period that reduces motor performance and increases wear. Fig. II LOWER BLADE GUARD Do not use the saw without the lower blade guard.
38 39 38 39 Fig. JJ Fig. KK SAWDUST Periodically, sawdust will accumulate under the work table and base. This could cause difficulty in the movement of the worktable when setting up a miter cut. Frequently blow out or vacuum up the sawdust. Wear proper eye protection to keep debris from entering eyes when removing sawdust from unit.
38 39 38 39 To avoid injury from accidental starting, always turn switch OFF and unplug the tool before moving, replacing the blade or making adjustments. TROUBLESHOOTING GUIDE - MOTOR PROBLEM PROBLEM CAUSE SUGGESTED CORRECTIVE ACTION Brake does not st op blade within 10 seconds.
40 41 40 41 PROBLEM PROBLEM CAUSE SUGGESTED CORRECTIVE ACTION Blade hits table. 1. Misalignment. 1. See ADJUSTMENT -Setting Cutting Depth section. Angle of cut not accurate. Can not adjust miter. 1. Miter table unlocked. 2. Sawdust under table. 1. See OPERATION - Miter Angle Adjustment section.
40 41 40 41 7-1/4 in. COMPOUND MITER SAW MODEL NO . 137.21 1940 When servicing use only CRAFTSMAN replacement parts. Use of any other parts many create a HAZARD or cause product damage. Any attempt to repair or replace electrical parts on this Miter Saw may create a HAZARD unless repair is done by a qualified service technician.
42 43 42 43 7-1/4 in. COMPOUND MITER SAW MODEL NO . 137.21 1940 SCHEMATIC O P E R A T O R ’ S M A N U A L.
42 43 42 43 7-1/4 in. COMPOUND MITER SAW MODEL NO . 137.21 1940 PARTS LIST FOR MOTOR I.D. Description Size Qty 0HX7 NEEDLE ROLLER BEARING 1 0JX2 HEX. SOC. SET SCREW M5*0.8-6 2 0KCP CR. RE. PAN HEAD TAPPING & WASHER SCREW M5*12-60 2 0KNE HEX. NUT M6*1.
44 44 Y our Home For expert troubleshooting and home solutions advice: www .managemyhome.com For repair – in your home – of all major brand appliances, lawn and garden equipment, or heating and co.
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