ZOJAN ARC140 Stick Welder: up to 140 A, 110 V

What it welds

The ZOJAN ARC140 Stick Welder is a stick inverter with a maker-stated output of up to 140 amps on 110-volt input.

Miller's starting rule, 1 amp for each 0.001 inch of steel, puts 140 amps at roughly 0.140 in of steel in one pass; thicker work means bevels and more passes. Run the amperage selector.

The listing doesn't give a duty cycle with its amperage, which makes long beads hard to plan; the rating plate or manual should state it. Why it matters.

Household 120-volt power caps its output; check the circuit size the manual asks for. What input voltage changes.

Use a lens of at least OSHA's minimum shade for the current: shade 8 or darker for typical TIG or stick work here. Shade chart.

Also on the listing: dimensions of 12.99 x 12.99 x 5.12 inches and a weight of 7 lb.

Is it the right machine for the job?

Buy it for

Farm and structural repairs
Sheet metal to about 0.140 in

Skip it for

Steel much past 0.140 in in one pass
Aluminium

What it does well, where it falls short

Does well

Up to 140 A output
Runs on household 120 V

Falls short

Duty cycle not stated with amps
120 V caps output
Slag cleanup

Power and setup notes

Ratings are the maker's own, stated under the maker's conditions. Follow the manual, wear eye protection of at least OSHA's minimum shade, keep combustibles away, ventilate, and have a licensed electrician install new circuits.

Rated output and specs

Every figure below comes from the source shown in brackets. Where the maker doesn't state something, we say so instead of estimating.

Model number	ARC140	Retailer
Product weight	7 lb	Retailer
Dimensions (seller)	12.99 x 12.99 x 5.12 inches	Retailer
Power	dc	Retailer
Output range	140a	Retailer
Input power	110v	Retailer