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For automotive body work, panel repair, and thin-sheet fabrication — 100-150 amp single-phase MIG welders cover the working range, with the lower amperage suited to thin sheet (under 2mm). For general workshop fabrication on mild steel up to 8-10mm — 180-220 amp single-phase machines are the standard. For heavy fabrication and structural work over 10mm — 250-350 amp machines, single-phase or three-phase depending on supply. Match the machine's amperage range to the typical material thickness.

Duty cycle is the percentage of a 10-minute cycle the welder can run at its rated current before needing cool-down. A 200A welder rated 60% duty cycle at 200A can weld continuously for 6 minutes before needing 4 minutes of cool-down. Lower duty cycles mean shorter welding sessions; higher duty cycles allow more continuous welding work. For production-style welding, choose machines rated 60% or higher at your operating amperage. The duty cycle is listed on product pages and varies with the operating current.

Single-phase MIG welders run on 230V household-style supply (13A or 16A 230V plug, depending on the machine) and are suitable for most independent garages, fleet workshops, and smaller fabrication shops. Three-phase MIG welders run on 400V three-phase supply (typically a 32A or larger three-phase outlet) and are needed for the highest-output machines (350+ amp) used in industrial fabrication. Three-phase machines have higher duty cycles, smoother arc characteristics, and lower running costs at sustained high output — but only available where three-phase supply is installed.

Yes for the majority of common MIG welder platforms. Replacement drive rolls (sized to wire diameter), torch liners, contact tips, gas nozzles, gas diffusers, and the typical wear parts of the wire-feed mechanism are available. For control-board-level repairs or motor replacements on older machines, search by the machine model code or WhatsApp 07754288583 with the model details and a clear photograph.

Returns are accepted within 30 days of purchase, in original packaging, on orders delivered within the United Kingdom. For damaged-on-arrival items, report within 24 hours with photographs to [email protected] — we will typically arrange collection and replacement at no cost to you. For parts that don't fit your machine, the Fit Guarantee covers a hassle-free return at no cost. For buyer's remorse — you've changed your mind or ordered the wrong item, email us first to obtain a Return Merchandise Number; a restocking fee may apply. Refunds are issued to the original payment method once the return is inspected.

Delivery time depends on the product, your destination, and availability — the estimated time for any item appears on the product page, and 'Check where we deliver' confirms coverage for your postcode before you order. Next-day delivery is available on most products; the option appears at checkout when applicable. We deliver across the UK, Europe, the Middle East, and Africa. Use the country selector at checkout to confirm coverage and delivery options for your destination.

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Mig Welder

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Within Welding Machines, MIG Welder covers the metal-inert-gas (MIG) and metal-active-gas (MAG) welding machines used in fabrication, automotive bodywork, agricultural repair, and general workshop steel-welding applications. MIG/MAG is the workhorse welding process for trade and professional use — fast, reliable, easy to learn, and capable of producing strong welds across thin sheet up to thick structural section.

Parts For Machines supplies MIG welders across the trade and professional ranges — typical machine sizes from compact 100-150 amp single-phase machines (suited to bodywork and light fabrication) up through 200-300 amp single-phase machines (general workshop use), to 350+ amp three-phase machines (heavy fabrication and industrial applications). Parts For Machines is an Authorised Distributor and Seller of Sealey and SIP across the MIG welder range.

Sealey carries the deepest line of compact and mid-range MIG welders, while SIP extends into industrial-rated three-phase machines. Clarke extends the range at competitive trade pricing. Product pages list welding output current (in amps — the typical operating range and maximum), input voltage and phase (single-phase 230V or three-phase 400V — match to your workshop's electrical supply), duty cycle (the percentage of a 10-minute cycle the machine can weld at the rated current — e.g., 60% duty cycle at 200A means 6 minutes welding, 4 minutes cooling per 10-minute cycle), wire-spool capacity (5kg or 15kg spools), and welding-mode features (synergic adjustment, pulse welding, and TIG/MMA crossover capability on multi-process machines).

Welding consumables — MIG wire across diameters and grades, contact tips, gas nozzles, gas hoses, and welding helmets — are listed in the separate Welding Consumables & Accessories section. Trade pricing on multi-machine and workshop fit-out orders is available; contact the team via WhatsApp 07754288583.

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FAQs

For automotive body work, panel repair, and thin-sheet fabrication — 100-150 amp single-phase MIG welders cover the working range, with the lower amperage suited to thin sheet (under 2mm). For general workshop fabrication on mild steel up to 8-10mm — 180-220 amp single-phase machines are the standard. For heavy fabrication and structural work over 10mm — 250-350 amp machines, single-phase or three-phase depending on supply. Match the machine's amperage range to the typical material thickness.

Duty cycle is the percentage of a 10-minute cycle the welder can run at its rated current before needing cool-down. A 200A welder rated 60% duty cycle at 200A can weld continuously for 6 minutes before needing 4 minutes of cool-down. Lower duty cycles mean shorter welding sessions; higher duty cycles allow more continuous welding work. For production-style welding, choose machines rated 60% or higher at your operating amperage. The duty cycle is listed on product pages and varies with the operating current.

Single-phase MIG welders run on 230V household-style supply (13A or 16A 230V plug, depending on the machine) and are suitable for most independent garages, fleet workshops, and smaller fabrication shops. Three-phase MIG welders run on 400V three-phase supply (typically a 32A or larger three-phase outlet) and are needed for the highest-output machines (350+ amp) used in industrial fabrication. Three-phase machines have higher duty cycles, smoother arc characteristics, and lower running costs at sustained high output — but only available where three-phase supply is installed.

Yes for the majority of common MIG welder platforms. Replacement drive rolls (sized to wire diameter), torch liners, contact tips, gas nozzles, gas diffusers, and the typical wear parts of the wire-feed mechanism are available. For control-board-level repairs or motor replacements on older machines, search by the machine model code or WhatsApp 07754288583 with the model details and a clear photograph.

Returns are accepted within 30 days of purchase, in original packaging, on orders delivered within the United Kingdom. For damaged-on-arrival items, report within 24 hours with photographs to [email protected] — we will typically arrange collection and replacement at no cost to you. For parts that don't fit your machine, the Fit Guarantee covers a hassle-free return at no cost. For buyer's remorse — you've changed your mind or ordered the wrong item, email us first to obtain a Return Merchandise Number; a restocking fee may apply. Refunds are issued to the original payment method once the return is inspected.

Delivery time depends on the product, your destination, and availability — the estimated time for any item appears on the product page, and 'Check where we deliver' confirms coverage for your postcode before you order. Next-day delivery is available on most products; the option appears at checkout when applicable. We deliver across the UK, Europe, the Middle East, and Africa. Use the country selector at checkout to confirm coverage and delivery options for your destination.

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