Operator's Manual CRAFTSMAN ++ _ PROFESSI ONAL_ 1 8" Metal Cutting BAND SAW WITH WELDER Model No. 351.21 4300 CAUTION: Read and follow all Safety Rules and Operating Instructions before First Use of this Product. Sears, Roebuck and Co., Hoffman www.sears.com/craftsman 25173.01 Draft (05/21/07) Estates, IL 60179 U.S.A.
BE PREPARED Warranty .................................... SafetyRules............................... Unpacking.................................. Assembly ................................... Installation ................................. Operation................................ Maintenance ................................ Troubleshooting ........................... PartsIllustrations andLists.................. 2 2-3 3 3 3-5 5-11 11 12-13 14-23 FOR JOB • Wear proper apparel.
• Avoid accidental start-up. Make sure that the tool is in the "off" position before plugging in. • Do not force tool. It will work most efficiently at the rate for which it was designed. • Keep hands away from moving parts and cutting surfaces. • Never leave tool running unattended. Turn the power off and do not leave tool until it comes to a complete stop. • Do not overreach. Keep proper footing and balance. • Never stand on tool.
POWER SOURCE Check with a qualified electrician if grounding instructions are not understood or if in doubt as to whether the tool is properly grounded. Band saw requires a 115 or 230 volt, 60 Hz power source. Band saw is shipped with motor and controls prewired for 115 volt operation. Line cord does not have plug. A 115 volt, 20/30A three-prong plug must be attached to the line cord. Green (or green and yellow) conductor in cord is the grounding wire.
Rewire saw motor to 230 volts (See Figure 3). EXTENSION CORDS • The use of any extension cord will cause some drop in voltage and loss of power. • Wires of the extension cord must be of sufficient size to carry the current and maintain adequate voltage. Use the table to determine the minimum wire size • (A.W.G.) extension cord. 115V • Use only 3-wire extension cords having 3-prong grounding type plugs and 3-pole receptacles which accept the tool plug.
SPECIFICATIONS Depth of throat ............................. 18" Maximum depth of cut ...................... 10s/4'' Table size ........................... 23% x 21%" Table tilt ............................ -15 to +15 ° Wheel diameter ............................ CAUTION: Do not operate the band saw and the welder at the same time. 18" Blade length .............................. 140" Blade width ............................. Blade speeds ....
TENSIONING BLADE 0.002" Refer to Figure 15. • Tension blade by rotating handwheel (Key No. 38). Be sure blade guides do not interfere with blade path. • Tighten blade until it is properly tensioned. 0.002" Blade Guide • A properly tensioned blade will ring slightly when back of blade is plucked (like a string on an instrument). NOTE: Check tension of new blade. Additional tension may be required after a few minutes of operation. TRACKING BLADE Refer to Figure 15.
MATERIAL Highcarbonsteel Freecuttingsteel Ferro-manganese Ferro-nickel Ferro-nickel-chrome Ferro-molybdenum Ferro-chrome (med.
ADJUSTING TABLE ANGLE MITER GAUGE Refer to Figure 16. • Angle cuts can be made by tilting table left to right. Loosen socket head bolts (Key No. 12) to tilt table up to 15 ° right or left. Use angle scale to set table angle (Key No. 18). Use miter gauge (not provided) for securing and holding workpiece at desired angle to produce angled cuts. Use scale to adjust gauge to desired angle. • Never at the piece. could TYPE OF CUT • Band saw can be used to perform a variety of cuts.
• Incorrect- BladesClampedAtAngle Tooth grinding procedure must be done carefully in order to grind the proper number of teeth and not to grind below gullet which would weaken the blade. BLADE WELDING Refer to Figures 7 and 12. • Incorrect - Blades Not Ground Square To set weld pressure adjustment knob, turn the knob counterclockwise to increase the pressure. The pressure adjustment knob controls force applied to the movable jaw.
Heat build-up in the tool can cause serious damage to the tool. Allow transformer to cool down to room temperature between each welding or each annealing operation. It is a safe procedure to let the transformer be idle for at least 3 minutes between successive welding/annealing operations. WARNING: Make certain that unit is disconnected from power source before attempting to service or remove any component.
SYMPTOM POSSIBLE Excessive blade breakage 1. Material not secure on table Premature blade dulling 2. Incorrect speed or feed 3. Blade too coarse for material 4. Incorrect blade tension 5. Teeth in contact with work before sawing 6. Blade rubs on wheel flange 7. Misaligned guides 8. Blade too thick for wheel diameter 9. Cracking at weld 9. Replace blade 1. Blade too coarse 1. Use finer tooth blade 2. Excessive blade speed 3. Inadequate feed pressure 4. Hard spots or scale in or on material 5.
SYMPTOM POSSIBLE Motor running too hot 1. Blade tension too great 2. Blade too coarse for work (typical when cutting pipe) 3. Blade too fine for work (typical when cutting slick or soft material) 4. Excessive dirt and chips 1. Reduce tension on blade 2. Use blade with finer teeth 1, Key switch not on 2. Not plugged in 3. Loose electrical connections 1. Turn key to on 2. Plug into supply 3. Have qualified electrician check electrical connections 4, Thermal overload relay tripped 5. Fuse blown 4.
Model 351.21 4300 Figure 13 - Replacement Parts Illustration for Switch, Shear and Deflector 8_ 4 13 20 14 ? 39 46 \1 29 28 26 38 37 29 26 2i 30 14 31 "30
KEY NO. PART NO. 1 2 20258.00 18637.00 3 4 5 17737.00 17738.00 STD863408 6 7 8 9 10 11 15561.00 STD863508 17739.00 16934.00 16935.00 17740.00 12 13 04493.00 18638.00 14 15 16 16760.00 16761.00 17400.00 17 18 19 17401.00 18006.00 17501.00 20 21 22 STD840409 05156.00 STD863635 23 24 20257.00 09845.00 * DESCRIPTION KEY NO. PART NO. QTY. Switch Plate DESCRIPTION QTY. 1 1 25 STD870625 6-1.0 x 25mm Socket Head Bolt* 2 1 1 6 26 20260.00 27 20261.00 23928.
Model 351.
KEY NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 2O 21 22 23 24 25 26 27 28 29 30 31 32 33 KEY PART NO. 18640.00 20229.00 20230.00 STD851006 STD840610 20231.00 18641.00 05991.00 09845.00 09442.00 20232.00 01833.00 05790.00 STD852005 STD511002 05297.01 20234.00 00964.00 20235.00 05324.00 18642.00 04696.00 05318.00 05374.00 18643.00 18653.00 05330.01 20233.00 18644.00 18645.00 18652.00 20236.00 20237.00 DESCRIPTION Welder Cover Spacer Grinding Wheel 6mm Flat Washer* 6-1.
Model 351.21 4300 Figure 15 - Replacement Parts Illustration for Wheels and Speed Handle 9 8 5 2 3 4 29 30 ] 26 70, 36 "_33 o_ J 61 \ 62 64 45 44 22 t t 51 18 54 55
KEY NO. PART NO. DESCRIPTION KEY NO. QTY. PART NO. DESCRIPTION 16992.00 16947.00 5 x 5 x 16mm Key Handwheel 2 1 06169.00 STD851006 25404.00 3AM1-18 Retaining Ring 6mm Flat Washer* Blade Guard 2 4 1 Cabinet Gasket 1 1 1 1 2 01900.00 18660.00 3AMI-25 Retaining Ring Tread 1 2 37 3 4 5 STD315555 04790.00 18662.00 6005ZZ Bearing* 2 2 1 39 6 7 8 16949.00 16954.00 16955.00 3BMI-47 Retaining Ring Upper Wheel Nut Stud Pivot 1 1 1 42 44 N/A 17694.00 18707.00 9 10 11 STD852010 16943.
Model 351.214300 Figure 16 - Replacement Parts Illustration for Table 1 46 55 30 \ 43 6 *'/28 11 10 49 5 r,o o 38 37 23 9 4( _ 28 26 20 24 44:25 \ 32 20 21 42 16 17 18
KEY NO. PART NO. 1 17697.00 2 17698.00 DESCRIPTION Table Support Frame 3 4 5 6 7 8 9 10 17699.00 17700.00 01002.00 STD851010 STD852010 STD841015 STD836030 STD836045 Left Table Bracket 11 12 QTY. 1 1 KEY NO. 29 30 PART NO. 08560.00 16962.00 DESCRIPTION 8-1.25 x 15mm Set Screw Knob QTY. 4 1 Air Nozzle Clamp Housing Spring 5-0.8 x lOmm Flat Head Screw Guide Post Rod Handle 1 1 1 1 4 1 1 1 31 Right Table Bracket 10-1.5 x 25mm Socket Head Bolt lOmm Flat Washer* lOmm Lock Washer* 10-1.
Model 351.
KEY NO. PART NO. 1 2 17716.00 16966.00 3 4 5 09849.00 15128.00 20069.00 6 7 20256.00 STD835020 DESCRIPTION Speed Change Shaft Housing Speed Change Shaft 1/2" Flat Washer 1/2"-12 Fiber Hex Nut KEY NO. QTY. 1 1 33 2 1 1 35 34 36 Variable Pulley Assembly Hex Nut 1 8-1.25 x 20mm Hex Head Bolt* 4 37 Reset Cover 1 1 1 40 38 39 8 9 10 20255.00 16968.00 17733.00 11 12 13 00256.00 16969.00 STD843015 Grease Fitting 3AMI-20 Retaining Ring Shaft Block 10-1.
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