Best Spot Welders 2021 – Reviews, Comparisons & Guide
Spot welders are designed to make small weld spots that clamp pieces of metal together.
These welds are often used on vehicles, watercraft and many other pieces of equipment and machinery.
The spot welders are the ones that can be used on the material types and thicknesses especially on the thinner metals that you work with most often.
We asked our fabrication welding specialist to tell us which spot welders they used, and which ones they would recommend for novices and professionals alike. The following four machines were the most frequently suggested items.
Comparison Chart Of Our Favorites
Provide Stable and firm welding
High output voltage able to bear heavy duty load
Suits for various sizes of battery pack
New panel design with intelligent welding function
Simple Lever Function
Maximum capacity: 20 gauge Autobody steel
Best Spot welders 2021 Reviews
1. Bestauto 3500A 12KW Spot Welder for Car Dent Repair
- Item Weight: 28.5 pounds
- Dimensions: 25 x 15 x 9
- Vehicle Panel Spot Puller
- Provides 9 welding modes
- Stable and firm welding
With 12KW power, this durable spot welder is a great tool for any perfect car repairing results. It is a perfect choice for professional car repairing, as the shell made of sturdy stainless steel with the coating of surface paint keeps it harmless and unaffected for years! Moreover, with supreme heat resistance and essential safety measures, it is an item to invest in!
Don't have to worry about overheating as the Bestauto 3500A comes equipped with an internal cooling system, providing more runtime without any issues.
Two welding guns come along with the product, giving you the ability to work on two different spots at once! Also, by switching the welding modes of the device, you can work on dents of different sizes and types with precision.
There are no confusions that Bestauto 3500A is an elegant machine made for professional tasks. It has great portability, solidly built, and a variety of options to assist you with dent repairing.
2. Solary 4200 Spot Welding Machine
- Item Weight: 96.8 pounds
- Dimensions: 22 x 15 x 37
- High output voltage
- Heavy duty load
- Adjustable welding current
A professional spot welding machine should come with a full set of gears to do various repairing projects at once. Some devices can easily fix small dents, sometimes leaving some damage on the paint. However, in the case of Solary 4200, the machine has great capability of working on large dents on your vehicle.
It weighs nearly a hundred pounds. As a result, it may not be the portable device you are looking for using at your garage. However, it is a suitable piece for professionals giving repairing services.
The dent puller comes with a ton of accessories, each usable with the help of the device. All these accessories provide you several different options to fix any dents or spots with ease.
The device also provides a range of options for adjustability! For example, a pre-programmable setting for the time of operation and control of welding current allows the dent puller to function more efficiently. Overall, it is a solid pick for professionals!
1. Mophorn 737G Automotive Spot Welders
- Item Weight: 12.08 pounds
- Dimensions: 9.1 x 5.5 x 8.3 inches
- Style: 737G
- Voltage: 110 volts
- Batteries Required: No
This welding device can be used for a wide variety of applications. It can be applied when working on a button battery, polymer battery and protection boards. It is useful for automotive body, stainless steel hardware repair and installation, stainless steel mesh installation and repair, or working on things like your mobile phone cameras.
It has foot pedal controls that give you the ability to weld a spot precisely where you need it at the temperature that you need for the material you are welding. It has a fixed welding type that is illuminated with LED lights. It is the pushup welding mode that is ideal for small battery pack work.
The LCD display panel shows you the pulse quantity and the current you are operating at. You can set or change the pulse and current with simple to use adjustments. It also has an efficient cooling system that uses a smart chip to help prevent the device from overheating.
2. SUNKKO 737G+ Battery Spot Welder
- Item Weight: 15.32 pounds
- Dimensions: 5.51 x 9.84 x 7.87 inches
- Model Number: 737G+
- Material: Iron, plastic, steel, copper
- Power Source: Ac
This welding device is battery powered. It has built-in temperature sensors, and it has a cooling system that automatically kicks in when the internal temperature of the machine reaches a pre-determined range.
This is a small device that is easy to carry and easy to use. It can be used to weld fixed copper that ranges in thickness from 0.03 to .03mm and can be used to weld nickel that is up to 0.15mm thick. It comes with a welding pen that is very easy to learn to control and use. The panel is designed to help you control the pen and keep your welding functions properly adjusted.
When you do not want to use the welding pen you have the option of using the fixed welding head and the foot pedal control to create the welds you need. You can use the welding pen in conjunction with the foot pedal to increase control or you can use the welding pen without the foot pedal. The variations of processes allow you to control the work you do.
3. Stark Professional Electric 240 Volt Pro Spot Welder
- Item Weight: 28.4 pounds
- Dimensions: 20.39 x 9.49 x 6.69"
- Model Number: 55010
- Manufacturer: Stark USA
- Material: Mixed
This welding equipment is constructed on the single-phase design. It allows you to weld together a large variety of materials and thicknesses. It is easy to operate and you simply put the materials into position and press the lever to start the weld.
The welding tips of the device are formed from high-quality steel material. They provide the strength and ability your machine needs to make welds on thicker items. The machine even comes with replacement tips for when your tips need to change. The tips easily twist off and the new tips are simply screwed into a position where the old one was.
There is a lever that activates the welding process. You press down on the lever and hold slight pressure against it to hold it in position and the machine does the work. It has a convenient handle designed into it so it is very portable.
It has a 240 volt rating and provides 2.5 KVA with a 50% duty cycle or operating factor. It can handle mild steel that is up to 1/8” thick. It is a 16 amp device with a six inch throat depth.
4. Lenco Autobody Portable Spot Welders
- Item Weight: 105 pounds
- Dimensions: 20-1/2"H X 11"W X 16"L
- Line fuse: 50 AMP
- Single phase: 60/50Hz KVA
- Welding cable length: 5'
This is a portable welding device that has wheels to help you move it. It weighs 105 pounds but the convenient handle and wheels help you to reposition the device with very little effort.
It has the ability to weld up to 20 gauge auto-body steel. It has a five foot welding cable, and a 50 foot power input cable. There is ample storage space for commonly used items included on the device so you can have everything you need readily available.
The control panel is protected so there are no accidental setting changes while you work. It has an easy to reach on and off switch and a solid-state timer.
This auto body spot welder is a solidly built machine that is durable and will provide you with the ability to weld on the majority of metals you want to use it on. It is a single-phase device that is rated 60/50Hz KVA. The primary voltage is 208/230 and the line fuse is a 50 amp.
How to Choose the Best Spot Welder
Spot welding requires you to have welding equipment that can perform the process on the thickness of materials that you will normally be using. Before you buy a machine familiarize yourself with the following terminology and common feature descriptions that manufacturers use. Then you will understand the product descriptions more clearly and be able to choose the best equipment based on your needs.
There are basically two types of spot welding machines to choose from. The design of the machine will be determined by the work you will be using it to do and where you will be working.
Stationary machines are larger, heavier and harder to use. They are often more powerful and can be used to work on thicker pieces of metal than the smaller portable machines can.
Portable machines give you the ability to take the welding equipment with you. The portable machines are very handy for repair work around a farm or on a large ranch. You cannot weld materials that are as thick as you could if you were using the stationary device.
The power supply for your machine will play a huge role in the capability of the machine. A generator that is a 230 volt machine will provide you with the ability to operate the typical portable spot welder. If you have a stationary welder you need a generator that is a 400 volt for sufficient power.
The operating factor will often be described on the machine package and if you are unfamiliar with this term it is the same as a duty cycle. If the machine is described as having an operating factor of 70% at 100 amps then in a ten minute time period of machine operation at 100 amps the device will work 7 out of those ten minutes and take 3 minutes to re-cooperate.
A machine that is a higher current machine will have a higher operating factor and be more efficient.
When you see something on the machine advertisement that says 3-6000A or 15000A spot currents you can see what quality of welds the machine is capable of producing. The higher the spot current number is the better the weld quality will be.
Secondary Vacuum Voltage
This will tell you the priming quality the machine has. This voltage is measured at the terminals of the device prior to the application of welding current.
An isolator fuse is a voltage surge protection feature and it can lengthen the normal life expectancy of the welding equipment.
Frequently Asked Questions
How strong is a spot weld?
A spot weld is as strong as a normal weld. It is a permanent weld solution that clamps or joins two pieces of metal together. These welds can be relied upon to hold under all types of situations. They are used frequently in automotive design and metal watercraft construction.
What is meant by spot welding?
Spot welding is the process of joining two pieces of metal with a very small weld. Spot welding does not create a large visible weld line and can be used when the materials being joined are different thicknesses or different metals. To know more about spot welding definition and uses, you may check this post.
What does a spot weld look like?
A spot weld looks like a small section of a weld. It is a process used to join two items without doing a solid bead line of welding. You really will not notice the spot welds on items, like the 5000 welds on a car body, unless you are looking very carefully for them.
How many spot welds do a car have?
On the typical car body, there are 5000 spot welds. These spot welds join components that make up the car, the frame and the body together so you have one complete and solid structure when you are finished.
What is the difference between spot welding and tack welding?
Tack welding is a process of welding something in place just enough to secure it and keep it in place while you do a more permanent welding process. Spot welding is a permanent process designed to be durable and create a long-lasting joining of the materials.
What is the difference between spot welding and resistance spot welder?
Projection welding is actually spot welding with a few changes so that the welds can be created on thicker substances of 0.035 inches or more. Pioneer resistance welding processes can be used on thinner materials but most people do not try to apply it to materials thinner than 0.035 inches.
If you are looking for the best spot welder machine for use on battery packs then we recommend the Mophorn 737G Pulse. It is small and powerful and has plenty of safety features designed into it so you can make the best welds on the items you need to work on.
If you are looking for a spot welder that can be used on larger items like when you are doing auto body work then we recommend the Lenco LNXL4000. It has wheels designed onto it to make it easy to move the machine around your shop, and it has the power to weld on most auto body parts.
Last Updated on February 24, 2021 by Richard Boyer