Harbor Frieght Mill Drill [Welding] Repair.WMV

Here's what happens when you "over torque" cast iron, and leave it subjected to temperature extremes[ from 65 deg heated shop to winter overnight temps of15- 20degs F ] bi-metalic contraction[steel to cast iron] may the weaker metal loose!
WELDING PROCEDURE: Contrary to popular belief, that cast iron should always be arc welded with nickel [EnCi, Ni-rod ext.] electrodes. E-7018 low hydrogen produces a much stronger [very hard non-machinable] weld. The key is to pre-heat and hold temps under control, always use NEW and /or OVEN HELD electrodes, lower heat settings. I have had a long, successful track record of cast iron weld repairs this way. Of course, NI rod is used where the weld must be machined, but will be 20-30 % weaker than a weld made with a steel electrode.

Category:

Education

Tags:

• cast
• iron
• welding
• welder
• machine
• shop
• machinist
• fabrication
• blacksmithing
• mechanic
• repair