Spot Welding Machine
Product Code : LSK-WEAWLM-10678
Spot Welding Machine (SKU LSK-WEAWLM-10678) is a resistance welder that joins overlapping steel sheets by clamping them between two electrodes and passing a high current through a small spot. It is offered in AC and three-phase MFDC (medium-frequency direct current) versions for sheet-metal fabrication and production-oriented training. Science Lab Supplies supplies it from Ambala, India to technical institutes, engineering colleges, industrial training centres, contractors and distributors.
Specifications
Every technical detail of the machine is listed in the table below. In short, it is an AC or three-phase MFDC resistance spot welder with an encapsulated transformer, low-loss secondary circuit, secondary current feedback control and a water-flow safety cut-off, rated from 50 kVA to 340 kVA AC or 100 kVA MFDC.
| Specification | Value |
|---|---|
| SKU | LSK-WEAWLM-10678 |
| Versions | AC, and three-phase MFDC |
| Rating, AC | 50 kVA to 340 kVA, AC 2 phase |
| Rating, MFDC | 100 kVA, 3 phase |
| Power saving, MFDC machines | 50 to 60% |
| Nominal electrode force | 350 kg to 1000 kg at 5.5 bar |
| Throat depth | 450 mm to 1200 mm |
| Transformer | High-efficiency, encapsulated |
| Secondary circuit | Low loss, for maximum welding current |
| Ram | Sturdy, for high-speed operation |
| Control | Secondary current feedback controller |
| Safety | Water-flow cut-off switch for transformer, thyristor and inverter |
| Supplied by | Science Lab Supplies, Ambala, India |
Applications and Experiments for the Spot Welding Machine
A spot welder is used to join lapped sheet-metal parts quickly without filler metal, the method behind car bodies, enclosures and appliance panels. In training it shows how current, weld time and electrode force together decide the size and strength of the weld nugget.
- Sheet-metal and welding trades: resistance spot welding of lap joints in sheet cut on the Electric Shear.
- Automotive body courses: panel joining practice, alongside seam welding on the MIG Welding Machine.
- B.Tech and diploma manufacturing labs: studying the effect of current and electrode force on weld quality.
The machine needs a suitable electrical supply, compressed air for the electrode force (for example from an Air Compressor) and a cooling-water feed. The electrodes close with high force, so hands must be kept clear and trainees supervised.
Standard Scope of Supply
The Spot Welding Machine is supplied as a single unit in the AC or MFDC version and rating you choose. Any optional electrodes, tooling or accessories are listed separately on the quotation, which also confirms the throat depth and electrode force of the model offered.
Packing, MOQ and Lead Time
Machines of this size are quoted individually. Tell us the version, rating and throat depth required and the quotation will state packing, delivery time and price for that quantity, together with any other vocational training equipment you add to the same enquiry.
As a registered exporter with an Importer-Exporter Code, Science Lab Supplies can ship to buyers in Oman, the Philippines, Nepal, Bangladesh, Zambia and Rwanda. State the AC or MFDC version you prefer when you write to us via the contact page or the enquiry cart, and see the lab tender page for tender-based buying.
Frequently Asked Questions
What is the difference between the AC and MFDC versions?
The AC version is rated from 50 kVA to 340 kVA on a 2-phase AC supply. The MFDC version is rated at 100 kVA on a three-phase supply and delivers medium-frequency direct current.
What electrode force and throat depth are available?
Nominal electrode force ranges from 350 kg to 1000 kg at 5.5 bar air pressure, and throat depth from 450 mm to 1200 mm, depending on the model.
Who supplies the Spot Welding Machine?
Science Lab Supplies supplies it from Ambala, India as part of its welding and workshop machine range for training institutes and colleges. Each machine is quoted individually by version and rating.
Does the machine need cooling water?
Yes. It has a safety cut-off switch that monitors water flow to the transformer, thyristor and inverter, so a cooling-water supply is required at the installation.
Related Sheet Metal, Cutting and Welding Equipment
Spot welding is one step in sheet-metal fabrication. These items from the welding machine range and the welding set cut and punch the sheet, provide arc-based alternatives for seams a spot welder cannot reach, test sample joints and protect hands, and can share one quotation.
- Manual Hand Shear — 12 in hardened high-carbon steel blade; cuts up to 6 mm thickness.
- Hydraulic Steel Worker — punching, shearing and bar cropping stations, with 10 punches and dies up to 38 mm.
- Plasma Cutting Machine — cuts mild steel, stainless steel and aluminium sheet, up to 30 mm thick.
- TIG Welding Machine — 200 A to 600 A with pulsing and water cooling, for thickness down to 0.6 mm.
- Arc Welding Machine — MOSFET inverter stick welder with auto-adaptive arc force.
- Bend Test Equipment — bends a specimen through 180 degrees in one step with a two-way hydraulic cylinder.
- Welding Leather Gloves — heavy split leather with cotton lining, in 12, 14 and 16 in sizes.
Browse the full Welding Equipment and Workshop Lab Machine range, the Standard Welding Equipment Set range or all TVET lab equipment.
Last updated: 9 October 2026
