Miller 907909 Stick Welder: up to 110 A, 120 V

What it welds

The Miller 907909 Stick Welder is a stick inverter with a maker-stated output of up to 110 amps on 120-volt input.

By Miller's rule of thumb of 1 amp per 0.001 inch of steel, 110 amps reaches about 0.110 in in a single pass. Amps by thickness.

The maker's thickness claim reads "up to 1/8"".

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: a weight of 13 lb.

Is it the right machine for the job?

Buy it for

Farm and structural repairs
Sheet metal to about 0.110 in

Skip it for

Steel much past 0.110 in in one pass
Aluminium

What it does well, where it falls short

Does well

Up to 110 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	907909	Retailer
Power	Corded Electric	Retailer
Features (seller)	Portable	Retailer
Input power	120 V AC	Retailer
Product weight	13 lb	Retailer
Output range	110a	Retailer
Max steel (maker)	up to 1/8"	Retailer