WELDCLASS ULTRA 175MST MIG, Stick & TIG Welder – 170A | 10A Plug | Synergic MIG | Made in Italy | WC-175MST

European-Made Multi-Process Welder for Site Work, Maintenance and Light Fabrication

Supply Solutions Group supplies the WELDCLASS ULTRA 175MST MIG, Stick & TIG Welder (Product Code WC-175MST) for professional welding, maintenance, fabrication, construction and workshop applications throughout Australia.

The WELDCLASS ULTRA 175MST is a compact, European-made multi-process welding machine combining MIG, Stick/MMA and DC Lift-Arc TIG capability in one highly portable unit. Manufactured in Italy to WELDCLASS specifications, the 175MST is designed for tradespeople who need professional welding performance without the size and weight of a traditional workshop machine.

Producing up to 170A MIG output, the ULTRA 175MST can MIG weld mild steel up to approximately 6mm thick while operating from a standard 240V 10A power supply. Its compact 9kg design makes it particularly well suited to site work, field repairs, mobile maintenance and light fabrication.

One of the key advantages of the 175MST is its easy-to-use Synergic MIG control system. The operator adjusts the control according to material thickness, and the machine automatically coordinates voltage and wire speed, significantly simplifying machine setup for everyday welding jobs.

The machine supports gas and gasless MIG welding, Stick/MMA welding and DC Lift-Arc TIG welding, providing excellent versatility for workshops, maintenance departments and mobile tradespeople.

Important availability note: WELDCLASS now lists the ULTRA 175MST as a discontinued/phased-out model, with the FORCE 160MST and FORCE 180MST identified as recommended replacements. This listing is therefore best suited to remaining or existing stock rather than representing a current-production model.

Product Type

• Product Type: Multi-Process Inverter Welder
• Welding Processes: MIG / Stick / TIG
• Maximum MIG Output: 170A
• Input Supply: 240V
• Power Plug: 10A
• Manufacture: Made in Italy
• Best For: Maintenance, Site Work & Light Fabrication

Key Features

• Genuine WELDCLASS ULTRA Series welder
• Product Code: WC-175MST
• MIG, Stick/MMA and TIG functionality
• Gas and gasless MIG capability
• DC Lift-Arc TIG
• Maximum MIG output of 170A
• Maximum Stick/MMA output up to 150A
• Maximum TIG output up to 150A
• MIG welding capacity up to approximately 6mm mild steel
• Easy-to-use Synergic MIG controls
• Standard 240V 10A plug fitted
• Industrial-quality Euro torch connection
• European-made heavy-duty MIG torch
• Compact and portable 9kg design
• Accepts 1kg and 5kg wire spools
• Generator compatible
• Adjustable Stick/MMA Arc Force
• Made in Italy to WELDCLASS specifications

Technical Specifications

MIG Welding Capability

The ULTRA 175MST supports a versatile selection of welding wires, including:

• Mild steel solid wire: 0.6–0.9mm
• Gasless flux-cored wire: 0.8–0.9mm
• Stainless steel wire: 0.8mm
• Aluminium wire: 0.9–1.0mm
• Bronze/brazing wire: 0.8mm

This versatility makes the machine suitable for general fabrication, repairs, maintenance and a broad range of trade applications.

Stick / MMA Capability

The 175MST provides Stick/MMA output up to approximately 150A and supports common 2.0–3.2mm electrodes, including electrodes for:

• Mild steel
• Stainless steel
• Hardfacing
• General maintenance
• Repair applications

Adjustable Arc Force provides additional control over arc characteristics during Stick welding.

TIG Welding Capability

The machine provides DC Lift-Arc TIG welding up to 150A and can be used for materials including:

• Mild steel
• Stainless steel
• Copper
• Chrome-moly

WELDCLASS specifies TIG welding capacity of up to approximately 3mm depending on material and conditions.

Note: The 175MST is not suitable for TIG welding aluminium, as aluminium TIG applications generally require an AC/DC TIG machine. Aluminium can, however, be MIG welded with the 175MST using the appropriate setup.

Standard Package Includes

• WELDCLASS ULTRA 175MST welding machine
• 3m heavy-duty BZL 25 / 250A Euro-fit MIG torch
• 3m earth lead
• Gas regulator
• Drive roller for 0.6 / 0.8 / 0.9mm solid steel wire
• Drive roller for 0.8 / 0.9mm gasless wire
• Input lead
• 10A plug fitted

Typical Applications

• Light fabrication
• Site welding
• Field repairs
• Equipment maintenance
• Trailer repairs
• Agricultural maintenance
• Automotive fabrication
• Structural repairs
• Workshop fabrication
• General engineering
• Stainless steel fabrication
• Construction maintenance

Suitable Industries

• Construction
• Manufacturing
• Engineering
• Agriculture
• Automotive
• Mining maintenance
• Transport
• Facility maintenance
• Civil works
• General fabrication

Why Choose the WELDCLASS ULTRA 175MST?

The ULTRA 175MST offers an excellent combination of portability, simplicity and multi-process capability. At only around 9kg and fitted with a standard 10A plug, it is particularly useful for tradespeople who regularly move between worksites.

Its Synergic MIG controls simplify setup by coordinating voltage and wire speed according to the selected material thickness, while MIG, Stick and Lift-Arc TIG capability means one machine can handle a broad range of fabrication and repair jobs.

Why Buy from Supply Solutions Group?

Supply Solutions Group is an Indigenous-owned Australian supplier of welding equipment, industrial consumables, PPE and trade products, supporting businesses with streamlined procurement and Australia-wide supply.

Benefits of Partnering with Supply Solutions Group

• Australia-wide supply capability
• Indigenous-owned and operated business
• Genuine WELDCLASS products
• Procurement support services
• Trade account options
• Industrial welding supply capability
• Bulk purchasing solutions
• Product sourcing assistance
• Responsive customer service
• Ongoing industrial supply arrangements

Frequently Asked Questions

What welding processes can the WELDCLASS 175MST perform?
The machine supports gas and gasless MIG, Stick/MMA and DC Lift-Arc TIG welding.

Does it require a 15A outlet?
No. The ULTRA 175MST is supplied with a 240V 10A plug, making it particularly convenient for site and maintenance applications.

How thick can it MIG weld?
WELDCLASS specifies a maximum MIG welding capacity of approximately 6mm mild steel.

Can it weld aluminium?
Yes, aluminium can be MIG welded using suitable 0.9–1.0mm aluminium wire and the appropriate setup. It cannot AC TIG weld aluminium.

How heavy is the machine?
The ULTRA 175MST weighs approximately 9kg, making it highly portable for field and site work.

Can it run from a generator?
Yes. WELDCLASS specifies a minimum 7kVA generator, with 8kVA or greater recommended.

Is the ULTRA 175MST still a current WELDCLASS model?
No. WELDCLASS currently lists the 175MST as discontinued, with the FORCE 160MST and FORCE 180MST nominated as replacement models.