A Definite Guide To Buy Used MIG Welders

When buying a used MIG welder you don’t want to buy one just because it’s cheap! The features of the used and new MIG welder machine are extremely the same. The only difference is that you are buying second-hand items. Sometimes, welders find it hard in choosing the best used MIG welder machines. The main features of the cheap MIG welder are its simple navigation control and high efficiency.

Depending on its brand and model, used MIG welder machine covers is best suited for solid, cored and welding wire. It is also user-friendly and with deep welding pool. Over-all, used welders must function effectively similar to new ones. Identifying features of used and cheap MIG welder is totally simple through reading online reviews. Once you have this used mig welder machine, your next move is to use it effective. If you are not quite familiar on its actual usage, you can simply ask assistance to any professionals or just read its instructional manual.The following is what you should take into consideration buying used MIG welder.

How Many Amps Maximum?

When it comes to the maximum amps you want your used MIG welder to have this will be determined by what kind of projects you will be using the welder for and how often you will be using it.

Manufacturers claims vary, but they’ll generally claim to be able to weld unreasonably high thickness. Ignore what they say and use this chart instead:

Max Amps

90 Amp

110 Amp

130 Amp

150 Amp

180 Amp

Maximum steel thickness (butt weld)

2.00mm

2.50mm

3mm

4mm

5mm

Maximum steel thickness (with V and root gap)

3mm

3.8mm

4.5mm

6mm

7.5mm

Read the spec sheets to determine maximum amps and don’t go by the model name. Welder manufacturers used to have the max amps in their name, but marketing departments have started to become creative. For example, the Lincoln SP-135T still offers a maximum current of 135 amps but the Clarke 135TE only goes up to 130 amps.

How Many Amps Minimum?

Most smaller MIG welders have a minimum of 30 amps which is fine for 1.0 mm sheet, and passable on 0.8 mm steel with a bit of care and technique. Some welders have 20 or 25-amp minimum which would be more usable on 0.8 mm steel.

Any welder with a minimum of more than 30 amps (normally only very cheap or very powerful welders) would be unusable on car bodywork. One really cheap 100-amp welder has a minimum setting of 85 amps. That will give a range of 1.5 mm to 2 mm steel which is all but useless for most jobs. Many big welders designed to run all day at 300 amps will not go below a 40-amp minimum.

Workshop Power Supply

A used MIG welder should be able to run a welder up to around 150 amps on a 13-amp plug. Larger MIG welders would need a 32 amp round blue plug and suitable dedicated wiring, although they can be operated on a 13 amp plug on the lower settings. A 13-amp plug should be changed about once a year as they aren’t really up to supplying high currents for long duration.

Some of the cheaper welders blow fuses at surprisingly low outputs. So for your used MIG welder if you want to avoid issues with blown fuses respect the advice on power supplies and fuses.

Avoid Permanently Live Torches!

MIG welder manufacturers save a few pennies by leaving the contactor out of the welder. The contactor is the part that switches the electricity supply to the torch when the trigger is depressed. Without the contactor the torch is constantly live, so if you happen to touch anything while positioning the torch you’ll get arc eye.

Manufacturers will not mention the permanently live torch in their literature so ask before buying.

Duty Cycle

This is the percentage of a 5 or 10-minute period (depending on manufacturer) that you can weld before the welder overheats. For example, if a welder has a 60% duty cycle at 100 amps over 10 minutes, then the welder can be operated continuously at 100 amps for 6 minutes before it will need a 4-minute break.

Generally, duty cycle isn’t important for automotive repair work, as the amps tend to be low (higher duty cycle at lower amps), and 9 minutes out of 10 is normally spent setting up, so any welder with fan cooling should have a good enough duty cycle. It would be a big consideration for a fab shop welding steel I beams together all day.

Smaller welders without fans (non-turbo welders) running at full power will tend to have a very low duty cycle and owners report that the thermal cut outs can be annoying even for car restorations.

So the above are some things that you should definitely consider when looking at used MIG welders before actually buying one.

Supplier’s Reputation 

 The reputation of a certain company and supplier is extremely essential. To ensure the efficiency of its services and products, you need to know the feedback of their customers.

Aside from the above mentioned, you can get the best used mig welder for sale through depending online. With the use of your computer, you can easily trace the background of your suppliers and even their company set-ups, how they work and what item they are trying to sell. However, since there are several shops online, you need to be more conscious in purchasing high quality devices. Furthermore, you can also purchase used mig welder for sale through visiting local shops. Depending on their promotional event, some shops offer discount items and other incentives.

​Bottom Line

Purchasing used mig welder machines is extremely essential particularly to welders who have limited budget. By simply buying used machines, you can still perform your daily task. If you buy used mig welder machines, it doesn’t mean that it has a low-quality as compared to new ones. Take note that they are the same, the only difference is that it is slightly used by other welders. If you purchase used mig welder machine for sale, you can save great amount of money. That is why, large number of people desire to have this.

It is true that buying poor quality welder machines might put you in a dangerous state. So, before buying any used mig welder machines see to it that you know where and what to buy. In that way, you are free from any unexpected situations that can affect your welding procedures

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