Röhr MMA Welder -MMA-250FI-08

(3 customer reviews)


132 in stock

secure SSL Visa Maestro American Express Mastercard PayPal Worldpay
Free Delivery Within Mainland UK

Free UK Delivery

To Mainland UK. Same day dispatch on orders placed before 14:00 GMT. Full Shipping Terms.


Refined technology – Röhr power

Advanced MMA Welder, destroys expectations with extensive engineering from years of experience.

Exceed your Expectations

Röhr welders are built to last with high quality components that will ensure reliability for occasional or regular users. This welder uses the latest inverter technologies to dramatically reduce overall footprint. Inverters dramatically reduce the power required to weld by increasing efficiency by 30% and they produce a consistent power supply giving you the most stable welding arc. IGBT monotubing significantly increases efficiency compared to normal MOS tubing.

Perfect for a Wide Variety of Welding

This welder is multi-use so you can weld stainless steel, aluminium, carbon steel, copper and other coloured metals.

Röhr MMA Welder - MMA-250FI

The Latest IGBT Technology

The Latest IGBT Technology

IGBT is a bipolar transistor with an insulated gate electrode. This semi-conducting device is being increasingly used in power electronics because it combines the advantages of two transistor types: the easy controls of the field effect transistor and the fast switching and high breakdown voltage of the bipolar transistor. The IGBT also offers some robustness against short circuits because it limits the electrical continuity

Featuring ARC Force and Hot Starter

Featuring ARC Force and Hot Starter

With ARC Force, the current increases automatically when the arc is shorter. Hot Start automatically boosts the tension at the ignition of the arc, this function facilitates the electrical arc ignition. After ignition, the unit automatically returns to the preset voltage.

MMA ARC Welding

MMA ARC Welding

MMA is electrode welding with a coated electrode.



This function helps to prevent overheating of the electrode by switching off the welding current when the electrode sticks to the material.

Röhr Welders Come with a Variety of Accessories

When you buy Röhr, you will get the full package with a range of accessories to suit your welding needs. The welder comes with a welding mask, cleaning brush and a bag to store your accessories. Also the unit has a 2m electric cord so you can position your welder in a convenient place

3 reviews for Röhr MMA Welder -MMA-250FI-08

  1. Ramon

    This product is great and definitely what i’ve been looking for. It’s simple enough to use and does the job well. Portable and powerful.

  2. Euan Seel

    I think this is a very good portable welder, it is very adjustable, I am no welder, but even I can use it and get results.

    Very compact and lightweight, making it very easy to move about.

    Great piece of kit, and very promptly delivered.

  3. Jonathan Mosse

    This is a first class welder, more than powerful enough to weld 12mm mild steel, with power in reserve. Although it specifies a 60% duty cycle it has yet to stop while I’ve been working on the 250 amp full power setting. Incidentally, the claimed duty cycle at 190 amps is 100% which is more than believable based on my experience to date, so no more waiting an age for a transformer to cool down whilst desperate to continue with a job!

    It plugs into the standard 13 amp plug and is featherlight to carry. Indeed when the courier handed me the box I thought Union Mart had forgotten to pack the welder. It’s stylish too!

    Welcome to stick welding 2019!

Add a review

Your email address will not be published. Required fields are marked *

Shipping Information

Shipping – Fast & Free

We offer free shipping mainland UK (excluding Highlands/Grampians), on all orders under 70kg weight.

Your postage will be calculated when you enter your postcode at the checkout.

We use a variety of reliable 24-hour courier services on all of our machines – the courier depends on weight and locations. Parts & accessories are sent with Hermes Tracked Delivery.

Orders placed before 2pm on a weekday are dispatched the same working day.


  • Runs off a Standard UK Plug 240V AC
  • Input Current 43a / Output Current 20a – 250a
  • Duty Cycle 60%
  • Transfer Efficiency over 85%
  • Frequency 50Hz – 60Hz
  • Power Factor 0.73, No-load Voltage 56V
  • Insulation Grade F / Housing Protection Grade IP21
  • Suitable for 1.0mm – 4.0mm Electrodes

Choosing a Welder

Choosing the Correct Welder

Choosing the correct welding machine can be a daunting process. Our handy guide below explains some of the
terminology and different types of welders that we stock. This will help you to select the correct product that will be
fit for purpose for your specific welding tasks.



Traditional welding technique using a flux core. Simpler than other kinds of welding and quick to learn.

Suitable For:

  • Steels (non-Alloy)
  • Iron
  • Can be used for Aluminium, Copper etc


Uses an inert gas shroud around a continuously-fed reel filament to melt and join surfaces. Faster than TIG, suitable for most welding applications

Suitable For:

  • Aluminium
  • Steel/Stainless
  • Most welding applications


Uses a tungsten filament rod with inert gas shroud to melt and join surfaces. Produces a strong and higher quality weld than MIG.

Suitable For:

  • Stainless Steel
  • Thinner Metals
  • Fine Joinery


Reacts with the weld to produce less spatter or burn-in.

Suitable For:

  • Stainless Steel
  • High Strength Joins
  • Aluminium & Other Steels


Most recent technology using capacitors. Stores high voltages for steady release

Suitable For:

  • Multi Purpose TIG/MIG
  • Micor Controlled Current
  • Highly Efficient