Purchasing a Small Spot Welder

Even while a spot welder might be a highly expensive purchase, if purchased wisely, it can also be quite effective. To help you choose the ideal spot welder for you, Phonefix has put together this guide that walks you through the variables to take into account.

Spot welders are widely used in manufacturing, welding shops, and numerous industries because they are simple to use, dependable, and affordable.

When it comes to purchasing a small spot welder, you should be aware that there are many different options available to you. Whether you are looking for one that fits into your small workshop or a professional welding machine, you will be able to find a unit that fits your needs. These machines will be ideal for a range of welding applications and can be found in a wide variety of prices.

In this type of spot welding, two electrodes are positioned against the metal workpieces on opposing sides, and an electrical current is sent through the metal to join the two objects.

Factors to Consider Before You Buy A Spot Welder

Type Of Project

Finding the right machine requires knowing what work needs to be done. Almost anything, including battery packs and automobile detailing, may be successfully welded with spot welding.

You cannot, however, expect a spot welder designed for small 18650 batteries to be sensitive enough to handle small batteries or a spot welder designed for autos to be robust enough to join automotive parts.

Input Voltage

Any type of welder must have a certain input voltage. It is important to pick a spot welder that is compatible with the kind of outlets at home if you don’t want to spend extra money on adapters for your home.


Consumables vary depending on the project, and without them, some tasks may be difficult to do. Because a filler material is needed to serve as a bridge between the batteries during battery fusing, China Phonefix 3GOA Spot Welder includes nickel-plated strips specifically for that purpose.

Consumables are not always included with the purchase of every machine. If a purchase contains extra consumables, note it so you can plan ahead.


Obtain a larger and more durable spot welder if you want to remain in one place or if you won’t be moving about too much.

It can be wise for you to get a portable, tiny spot welder if you anticipate travelling around the workplace or between locations.

Material being welded

Some spot welders won’t be as adept at working with particular metals as others. Make sure the spot welder you’re considering can handle the task at hand by conducting thorough web research.

Related – What to Look For in a Mig Welder


The X-Torch 737G small spot welder is a rechargeable battery machine with a high-rate battery capacity of 5000 mAh. It can be fully charged in three hours via its USB interface. It also offers several safety features, including overcurrent protection and intelligent output current. It also comes with a nickel-plated steel belt and a user manual. However, its build quality isn’t up to par.

The 737G spot welder is easy to use, and it comes with a manual or automatic mode for the user’s convenience. It also has a 400-amp load capacity, rechargeable lithium battery, and type-C interface. It has a temperature protection circuit and shuts down automatically when the welding area reaches 140°F. In addition, it also comes with a 10-foot cord and an electrode holder.

When buying a spot welder, consider the brand and the specifications. If you’ll only use it occasionally, it might be better to go with a cheaper model. However, if you’re a professional, you should consider purchasing a more expensive machine. This way, you won’t end up with a faulty machine.

Another good feature of the 737G welder is that it has an LCD panel that shows the pulse and current during welding. This helps you set the right parameters quickly and accurately. The machine also has an intelligent radiator that keeps the welding process cool and prevents overheating. Moreover, the compact design and easy-to-use handle make it easy to move around.


If you’re looking for a small spot welder for small jobs, you can’t go wrong with a 240v model. These portable welders are easy to use and are compatible with both 220 and 240 volts. They can run at up to 16 amps.

This portable spot welder makes strong, quick spot welds on a variety of materials. It can handle mild steel, galvanized steel, stainless steel, and more. It features 6-inch tongs for easy spot welds. It also features a safety shut-off switch and a built-in voltage regulator.

The SQ-SW2 features a 1.8-inch color LCD display. It can be switched between automatic and manual working modes. It also has a high-temperature reminder and a screen flip function. It also has a firmware upgrade option. It comes with a one-year warranty, and is easy to use.

Another consideration is portability. Some people use these welders for welding small batteries. Likewise, some people use them to weld small 18650 batteries. If you’re looking for a portable welder, you’ll probably want to look for a high-powered model that can be carried around easily.

One of the features of this small spot welder is the Auto Weld mode, which enables you to weld with full force in an auto-welding mode. This feature is the first of its kind in the industry. Another feature is the C2X arm. This arm fits snugly into the i5 and requires no assembly, cables, or electrode changes. The C2X Arm transfers current through a pivoting copper conductor. This allows the electrode to build up its force.


The Kerpu small spot welder is compact, lightweight, and rechargeable. Its maximum power output is 650A and it is ideal for spot welding cylindrical lithium, nickel metal hydride, and cadmium nickel batteries. It features a unique overheating and overcharge protection device.

It comes with an English-language instruction manual. The welding pen is 16 inches long and made from low-resistance oxygen-free copper material to ensure stability during welding. The package also includes a small file for maintaining the pen. It can be used manually or automatically and is safe for individuals. It is a bit pricey compared to some battery-powered spot welders.

When buying a spot welder, be sure to read product reviews and ask questions to make sure that it meets your needs. Some reviews are negative and you should verify whether or not the product is really the one for you. You don’t want to end up buying a faulty product or one that isn’t worth the price. Also, make sure that you buy it from a reputable seller and avoid purchasing it from unscrupulous sellers.

The Kerpu small spot welder is one of the best-known brands when it comes to mini spot welders. While it offers standard performance numbers, it also has extra features that make it stand out from the crowd. Its safety features include overheating, overcharge, and overtemperature protection. It is also equipped with an adjustable output power of six grades for more accurate welding.

Related – Miller AC DC Welder – Multimatic 220 AC/DC

Squeeze time

Squeeze time is the amount of time the electrode must be under pressure in order to complete a weld. The time is often programmed into the weld controller before the electric current is turned on. It is important to program the squeeze time accurately to ensure that the weld process results in a good weld. It is also important to keep in mind that a long squeeze time can result in arcing and premature electrode wear.

The length of the squeeze time will be determined by the thickness of the sheets to be welded. For example, if the thickness of two sheets is 1 mm each, then the squeeze time for each sheet would be 10 periods at 50 Hz. When a large sheet is clamped between two electrodes, the weld time will be doubled.

A small spot welder is an excellent choice if you are working on a project that requires precise spot welds. The small design of this welder allows for fast spot welding on a variety of projects, including car body shells. These welders are also useful for a variety of sheet metal projects.

Another important parameter to consider is the electrode force. This determines the amount of energy needed to join metal sheets. A lower electrode force produces a smaller weld area, while a high electrode force causes cracking. Furthermore, a high electrode pressure can lead to thinning of the metal.

Work cycle

The work cycle of a small spot welder is a complex process that involves multiple processes. The electrodes, secondary winding, cables, and workpiece all create resistance during welding. In addition to these, there is also the contact resistance between the electrodes and workpiece. These processes are coupled to produce a complex weld that results in residual stresses.

The work cycle of a small spot welder depends on the load that it is welding. A small spot welder with a high load capacity can be used to weld various materials. It can handle a variety of loads, including stainless steel sheets, iron sheets, and nickel-metal hydride batteries. Its design also allows for its portability.

Another important feature of a small spot welder is its simple welding mechanism. It allows you to insert different materials quickly. You can start the welding process by pushing a button, which saves you time by reducing the need for manual work. Moreover, the handle on the machine makes it easy to carry it from one place to another.

Another factor that affects the work cycle of a small spot welder is the weld nugget size. This determines the amount of heat and pressure that is generated during welding. It is important to choose an electrode with the correct size for the job you are working on.

Input voltage

A small spot welder is a simple tool that can be operated with a battery. The welder is compatible with 240 and 220 volts and can deliver 16 amps of current. The built-in LED is helpful for working in low-light conditions or during the night. This tool also allows you to reach a soldering temperature of 300degC within seven to eight seconds.

In order to weld safely, you must understand the concept of upslope and downslope. The upslope is the period of time in which the electrical current reaches its peak, and the downslope is the span during which it is cut off. In addition, the hold time is the period of rest for molten metal. During this period, the electrodes are still applied to the molten metal, allowing it to conduct heat away from the weld.

Typically, the force applied by a small spot welder is around 90N per mm2. The mushroom electrode tip helps increase the contact surface area, and the sides of the electrode tip will make contact with the metal piece. The increased force helps keep the piece in place. In addition, a small spot welder can work with different types of electrodes.

When using a small spot welder, adjusting the amount of energy applied to the spot is essential to producing high-quality welds. Using too little energy will result in a weak weld nugget, while too much energy will cause overheating. A good rule of thumb is to keep the electrode’s depression no deeper than 25 percent of the sheet metal’s thickness.

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