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WELDING HINTS

  • Use a good quality wire with a large "cast". Check cast by pulling off 5 or 6 feet of wire, drop it on a hard floor, and measure the resulting diameter. If it is 48" or greater, you have a desirable cast wire...if diameter is under 48" you may experience slight weld bead instability.  TRY OUR NEW 70S6 SOLID ULTRA LARGE CAST WIRE AVAILABLE IN .030" and .035".  You'll Love It!  For .030" order part no. 1103, for .035" order part no. 1202
  • For steel welding we recommend a gas shield mixture of Argon and CO2.  Percentage of Argon minimum:75%, maximum: 92% flowrate varies but indoors generally 25--30 cfh is sufficient.  Outdoor welding may require that you cap the end of your bore with tin foil, this will help contain shielding gas if windy.
  • Use a power supply that allows voltage adjustment while you are welding. Click-type voltage adjusters do not allow fine adjustment once your bore welder has started.
  • For skip welds or bores where you only need to build up a portion of the bore, we recommend hooking your BOA up to a wirefeeder that has a burnback control installed. 
  • Set torch nozzle stick-out at about 1/8" from workpiece bore. 
  • Use proper torch rotation speed. Measure bore you will be welding in and refer to chart on borewelder for approximate speed setting.  To vary buildup thickness you may adjust rotation speed and/or wire feed rate. 

TIME REQUIRED FOR BORE BUILDUP

(helpful when estimating job times)

Metric: Calculate by multiplying the diameter (mm) by the length (mm) by .002

    Example: Diameter of the bore= 65mm; Length of the bore= 110mm

        Normal build up time=65 x 110 x .002 =14.3 minutes

 

English: Calculate by multiplying the diameter (in.) by the length (in.) by 1.25

    Example: Diameter of the bore= 4.2 inches; Length of the bore= 3.6 inches

        Normal build up time=4.2 x 3.6 x 1.25 =18.9 minutes

 

WIRE DEPOSITION RATE

(useful when calculating anticipated wire usage)

Metric: Calculate by multiplying the following:

    For .8mm wire- multiply the wire feed speed in mm/min by .00022

    For .9mm wire- multiply the wire feed speed in mm/min by .00033

    For 1.2mm wire- multiply the wire feed speed in mm/min by .00050

        Example: Wirefeed rate= 7400mm/min; wire size= .8mm

            Deposition rate= 7400 x .00022 = 1.63 kg/hr.

 

English: Calculate by multiplying the following:

    For .030 in. wire- multiply the wire feed speed in in./min by .0123

    For .035 in. wire- multiply the wire feed speed in in./min by .0167

    For .045 in wire- multiply the wire feed speed in in./min by .0277

        Example: Wirefeed rate= 320 in./min; wire size= .030 in.

            Deposition rate= 320 x .0123 = 3.94 lb./hr

THE BOA-308i AND BOA-450HD SERIES BORE WELDERS....DESIGNED SPECIFICALLY FOR WORKING ON 

HEAVY EQUIPMENT BORES.    TAKE ADVANTAGE OF THE BOA-308i FREE TRIAL PROGRAM TODAY. 

BELOW NOTE THE UNIQUE PASS-THROUGH DRIVE DESIGN OF THE BOA-308i PORTABLE BORE WELDER. 

THIS FEATURE, WHEN COUPLED WITH THE BOA REVERSIBLE, TELESCOPING TORCH EXTENSION MAKES

THE BOA PERFECTLY SUITED FOR REPAIRING CONSTRUCTION AND MINING EQUIPMENT BORES.  ALSO 

SHOWN IS THE OPTIONAL CENTERING CONE AND ROD KIT USED TO CENTER THE BORE WELDER THE 

SAME WAY A BORING BAR MAY BE CENTERED.  AS A BONUS, IF YOU ARE ALREADY USING A BORING

BAR SYSTEM THAT UTILIZES 32MM (1.25") BARS, YOU MAY ACTUALLY CENTER THE BORE WELDER DRIVE USING

YOUR EXISTING BAR.  

                     

 

Offering bore repair products worldwide, and heavy equipment bore repair services, bore welding, align boring by our sister company in New Hampshire, Connecticut, Massachusetts, Vermont, Maine, Rhode Island and New York. NH CT VT ME RI NY

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Last modified: September 19, 2012