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Craftsman 351.21 4300 Operator's Manual

18" metal cutting band saw with welder
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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
Estates, IL 60179 U.S.A.
www.sears.com/craftsman
25173.01 Draft (05/21/07)

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Summary of Contents for Craftsman 351.21 4300

  • Page 1 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)
  • Page 2 ONE-YEAR FULL WARRANTY CRAFTSMAN PROFESSIONAL If this Craftsman tool fails due to a defect in material or workmanship within one year from the date of purchase, call 1-800-4-MY-HOME® TO ARRANGE FOR FREE REPAIR (or replacement if repair proves impossible). This warranty does not include expendable parts, such as lamps, batteries, bits or blades.
  • Page 3 Before band saw is installed, a suitable location should be chosen. Band saw weighs approximately 1. Band saw needs to be set on a flat, level surface. 2. Make sure there is ample room for moving the work- piece through the entire cut. There must be enough room that neither the operator nor bystanders will have to stand in line while using the tool.

  • Page 4: Power Source

    POWER SOURCE 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.

  • Page 5: Extension Cords

    V 230V Craftsman 18" Vertical Metal Cutting Band Saw provides precision metal cutting for tool and die makers, machine shops and production work. Blade speed is infinitely variable and ranges from 80 FPM to 385 FPM for cutting ferrous and non-ferrous metal.

  • Page 6: Specifications

    OFF - Red color push button that deenergizes the magnetic contactor to stop the band saw. To restart the saw, turn the knob to reset and depress the ON button. KEY - Key switch locks machine to prevent unauthorized use.
  • Page 7 • Set screws (Key No. 23) are used to align the track- ing bracket to the saw frame. • Turn idler wheel (Key No. 5) by hand and observe how blade rides on the wheels.

  • Page 8: Changing Blade Speed

    BLADE Refer to Figure 15. WARNING: Never adjust blade speed unless machine is running or damage to saw may result. • Blade speed is adjusted by rotating handwheel (Key No. 50) while machine is running. Rotate handwheel clockwise to increase blade speed. Rotate hand-...

  • Page 9: Type Of Cut

    15 ° right or left. Use angle scale to set table angle (Key No. 18). TYPE OF CUT • Band saw can be used to perform a variety of cuts. Cutting procedure used depends on size and desired shape of cut. •...

  • Page 10: Blade Welding

    Incorrect - Blades Clamped AtAngle Incorrect - Blades Not Ground Square Incorrect - Blades Overlap Correct - Grind Blades Square and Clamp Straight Correct - Clamp Blades Flat with no Overlap Figure 10 - Blade Mounting and Clamping TOOTH SPACING Refer to Figure 11.
  • Page 11 Repeat "Blade Annealing" step. • After second blade annealing operation, the blade is ready for installation onto band saw. Follow band saw instruction when installing and adjusting blade. WARNING: Make certain that unit is disconnected from power source before attempting to service or remove any component.
  • Page 12 2. Check Blade Speed (page 7) 3. Use finer pitch blade 4. Tension blade properly; see "Operation" 5. Place blade in contact with work after saw is started and has reached full speed 6. Adjust wheel alignment properly 7. Adjust blade guides properly 8.
  • Page 13 (typical when cutting pipe) 3. Blade too fine for work (typical when cutting slick or soft material) 4. Excessive dirt and chips Saw will not start Key switch not on Not plugged in Loose electrical connections Thermal overload relay tripped...
  • Page 14 Model 351.21 4300 Figure 13 - Replacement Parts Illustration for Switch, Shear and Deflector "30...
  • Page 15 PART NO. DESCRIPTION 20258.00 Switch Plate 18637.00 Magnetic Starter 17737.00 Stop Switch Assembly 17738.00 Start Switch Assembly STD863408 4-0.7 x 8mm Pan Head Screw* 15561.00 Bracket STD863508 5-0.8 x 8mm Pan Head Screw* 17739.00 Key Switch with Two Keys 16934.00 LED Readout with Sensor 16935.00 Legend Plate...
  • Page 16 Model 351.21 4300 Figure 14 - Replacement Parts Illustration for Welder _,_----...
  • Page 17 PART NO. DESCRIPTION 18640.00 Welder Cover 20229.00 Spacer 20230.00 Grinding Wheel STD851006 6mm Flat Washer* STD840610 6-1.0mm Hex Nut* 20231.00 Grinder Cover 18641.00 Grinder Guard 05991.00 #10-24 x 1/2" Flat Head Screw 09845.00 3CMI-6 E-Ring 09442.00 Knob 20232.00 Right Clamping Lever 01833.00 5-0.8 x 8mm Flat Head Screw 05790.00...
  • Page 18 Model 351.21 4300 Figure 15 - Replacement Parts Illustration for Wheels and Speed Handle "_33 44 22...
  • Page 19 PART NO. DESCRIPTION 01900.00 3AMI-25 Retaining Ring 18660.00 Tread STD315555 6005ZZ Bearing* 04790.00 3BMI-47 Retaining Ring 18662.00 Upper Wheel 16949.00 16954.00 Stud 16955.00 Pivot STD852010 10-1.5 x 30mm Hex Head Bolt* 16943.00 Guide 16957.00 Shaft 16948.00 Slide Block 16942.00 Housing 00088.00 5/8"-11 Hex Nut (LH Thread) 16956.00...
  • Page 20 Figure 16 - Replacement Parts Illustration 44:25 Model 351.214300 for Table *'/28 9 4(...
  • Page 21 PART NO. DESCRIPTION 17697.00 Table Support 17698.00 Frame 17699.00 Left Table Bracket 17700.00 Right Table Bracket 01002.00 10-1.5 x 25mm Socket Head Bolt STD851010 lOmm Flat Washer* STD852010 lOmm Lock Washer* STD841015 10-1.5mm Hex Nut* STD836030 10-1.5 x 30mm Hex Head Bolt* STD836045 10-1.5 x 45mm Hex Head Bolt* 17729.00...
  • Page 22 Model 351.21 4300 Figure 17 - Replacement Parts Illustration for Motor and Blade Drive 33 32...
  • Page 23 PART NO. DESCRIPTION 17716.00 Speed Change Shaft Housing 16966.00 Speed Change Shaft 09849.00 1/2" Flat Washer 15128.00 1/2"-12 Fiber Hex Nut 20069.00 Variable Pulley Assembly 20256.00 Hex Nut STD835020 8-1.25 x 20mm Hex Head Bolt* 20255.00 Reset Cover 16968.00 Pulley Shaft 17733.00 Grease Fitting 00256.00...
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