Learn How To Weld

Lincoln Mig Welder

REDI-MIG 325 with 4D Remote Wire Feeder

Here is a workshop grade industrial mig welder from the lincoln electric company. It is the REDI-MIG 325 Remote, the model of the rremote wire feeder is called a 4D. It is a 3 phase mig welder and has 4 drive rolls to feed the mig wire through the welding gun. It also has about 8 meters worth of cables going from the welding power source to the wire feeder unit.

lincoln welder, redi-mig 325 This machine can be used for mild steel mig welding, stainless steel, gasless, flux cored welding and also aluminum welding (aluminium welding). This makes it a good choice for a range of welding applications.

Welder power supply

It has 32 voltage settings which are shown here in the photo below.

For each shitch position A, B, C or D. There are another 8 finer voltage settings called a, b, c, d, e, f, g, h. So that mean you have 4 main settings multiplied by the 8 smaller setting and it give you a total of 32 voltage settings. It also has volt and amp meters as well.

lincoln mig welder settings and controls

Remote wire feeder 4D

Here is the lincoln 4D remote wire feeder.

lincoln 4D remote wire feeder traveller

The door on this particular wire feeder machine opens upwards, some machines will swing open like a car door. I guess this one swings up like a lamborghini car door.

wire feeder unit on the lincoln welder

Looking inside we can see the mig wire that is installed onto the hub or axle. At the top in silver is the identification plate which has the machine details and serial number etc.

Below that is the burnback control knob.

And the last part we see is the complete drive roll feeder system.

insid ethe lincoln mig welder remote feeder

Close up of the 4 drive rolls

This machine has 4 driving feed rollers as opposed to just 2 drive rolls. This give the machine a lot more better control and smoother wire feedability of the welding wires. You can seet the shiny tall pipe, or canister at the back. This is the electrical motor that drives the feed rollers.

There is also that black plastic tension knob which is used to tension down the wire.

close up of the lincoln 4D drive rolls

Mig welder setting chart

When you open up the door to the feeder, it has a nice desciptive chart that tells you how ot set your mig welding machine up. It gives you the weldig wire type and the plate thickness you need to weld. And then from that information you can look up some voltage and wire feed speed settings to get you started in mig welding.

Also it clearly shows you how to connect the power leads up for different welding applications. And what I really think is neat is that it has a list of all the welding consumables and part numbers for you. This makes ordring parts really easy as you can just quote part numbers then.

settings for the welder

Controls of the front of the wire feeder

4D front panel controls

In this photo we can see the front panel of the wire feeder. You can see the switches for the 2 step and 4 step trigger lock function.

The second switch controls the gas purge function and the wire inching function. Both useful for setting up the mig welder.

Then we have the wire feed speed knob, which controls speed of which the wire comes out of the end of the mig gun.

And finally there is an adjustment for the spot timer. Those settings are used for tack welding or stitch welding.

The mig welding gun that came with this machine was not that good at all. It actuall had trouble feeding wire through it. And that original gun was swapped for another brand of mig gun, problem solved.

These machines come with a 3 year warranty.

Size wize the machine is this big: (mm) H x W x D : 760 x 447 x 905, and weights in at about 130kgs.