Tweco FP-235DC - Manual (Page 18)

DC STRAIGHT POLARITY WELDING
The electrode in DC straight polarity (DCSP) welding is negative and the work surface is
positive. The current flow is from the electrode to the work.
Ideal Current for:
• Hard Facing.
• Build Up - Heavy Deposits.
• Cutting Steel.
ROD METAL
AWS ROD NO. USE SIZE AMPERAGE THICKNESS
R52 Hard Surface
General Purpose Tillage Tools 1/8” 80 - 140 amps 1/16” - Up
Subject to Impact and Abrasion
R88 Tung Rod To Resist Serious Abrasion 1/8” 70 - 90 amps 1/16” - Up
ARC CUTTING Cutting and Drilling All Metals 1/8” 80 - Max. 1/16” - Up
Drilling All Metals
E6011 Deep 1/8” Maximum Dial Any Thickness
Penetrating 5/32” Setting
ARC GOUGING
E6011 Deep
Arc Gouging 5/32” Maximum Dial Any Thickness
Penetrating
DC REVERSE POLARITY WELDING
The electrode in DC reverse Polarity (DCRP) welding is positive and the work surface is negative. The current
flow is from the work to the electrode.
Ideal Current For:
• Overhead.
• Vertical.
• Cast Iron Welding.
• Heavy Aluminum.
• Rivet Welding.
• Sheet Metal.
• Low Hydrogen Welding.
• Arc Bronze Rod.
ROD METAL
AWS ROD NO. USE SIZE AMPERAGE THICKNESS
E6011 Deep Overhead and Vertical 1/8” 80 - 150 amps 1/8” - 1/2”
Penetrating Welding or Rusty Metals 5/32” 100 - 170 amps 1/4” - Up
E7018 Low High Carbon Spring Steel 1/8” 80 - 140 amps 1/8” - 1/2”
Hydrogen or Cast Steel 5/32” 100 - 170 amps 1/4” - Up
ENiCl Nickel Cast Iron 3/32” 50 - 70 amps 1/16” - 1/4”
Machineable 1/8” 80 - 120 amps 1/8” - Up
E308-16 Cast Iron 3/32” 50 - 100 amps 1/16” - 1/4”
Stainless Steel Stainless Steel or Unknown
Metal Max. Strength
1/8” 90 - 150 amps 1/4” - Up
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