Bmax – Building welding units

Quality and reliability at a reasonable price – this has been our objective ever since we launched of our family business in 1984. Our success is proven by our welding units which have been operating reliably for several decades. At first, we produced transformers. Bmax Ltd. was founded in 1990, when we started to develop welding units, and the company joined the field of welding technolgy.

Our products have been developed and designed by our company. Our product range includes compact welding units for DIY purposes, industrual CO2 welding units and plasma cutting units operating with compressed air. All machines and devices needed for unit production are available in our workshop, therefore we can meet special requirements as well. Our products are constantly developed and modernized in order to serve our customers' needs.

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Low-duty welding units (160–250A)

This group includes single-phase welding units MM161 and MM201, and three-phase welding units MM223, MM253 and MM253SYN. These devices are excellent for sheet metal work, bodywork, welding square tubes and other maintenance and repair tasks.

MM161, MM201, MM223, MM253, MM253SYN welding units

Single-phase welding units MM161 and MM201 are to be used at worksites where no three-phase network is available, or where on-site welding is frequently required. Material thickness is 0,8–5,0mm, recommended thickness of welding wire is 0,6 or 0,8mm. These devices are suitable for 2 phase, 4 phase, interval and spot welding. The burnback is to be set on the electronic panel.

Three-phase welding units MM223, MM253 and MM253SYN can be used for a wide variety of tasks in small-scale industry and maintenance. We recommend these machines for welding thin and medium thick sheets, square pipes and steel angle structures, but they are perfect for welding aluminum decorations as well. They are best for 0,8–6,0mm steel materials with 0,6/0,8/1,0mm thick welding wire, while for aluminum objects the welding wire should be 1,0/1,2mm thick. These devices include an NG433 electronic control panel, which is suitable for 2 phase, 4 phase, interval and spot welding as well, burnback can be set on the panel. However, if the customer requires, soft start, burnback and gas post flow functions with potentiometer (NG435 panel) can also be offered. Technical parameters of MM253SYN are identical with those of MM235.

To see the technical parameters of a certain welding unit, click on the relevant image. To print out the technical summary, press the Print icon.

Datasheet for Low-duty welding units
Type Mains voltage (V) Absorbed power (kVA) Mains fuse (A) Adjust­ment position Welding current (A) DC = 35%/60%/100% Wire (mm) Mat. thickness (mm) Size (mm) Weight (kg)
(SYN) Synergic / (W) Water cooled / (S) Separate wire feeder
MM161 1×230 4,5 1×16 7 35-160 160/120/95 0,6-0,8 0,6-4,0 750×380×600 62
MM201 1×230 5,5 1×25 7 35-200 200/150/120 0,6-1,0 0,6-5,0 750×380×600 65
MM223 3×400 7 3×15 7 35-200 220/170/130 0,6-1,0 0,6-6,0 750×380×600 79
MM253 3×400 8 3×15 10 40-250 250/190/150 0,6-1,2 0,8-8,0 750×380×600 83
MM253SYN 3×400 8 3×15 10 40-250 250/190/150 0,6-1,2 0,8-8,0 750×380×600 83
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Compact industrial welding units

MM323, MM323W, MM403, MM403W, MM453, MM453W and the corresponding SYNERG variants are designed and produced for industrial use. These units have an outstanding duty cycle (45%) and they also include a wire feed unit. They are excellent for the production of light, medium and heavy steel structures, but their wide welding range allows for the welding of thin sheets as well. Besides the options for traditional welding technologies (2 phase, 4 phase, spot, interval), soft start and the burnback regulation are also included, which make them suitable for a wide variety of industrial tasks. This product family is reliable and need little maintenance owing to the units’ robust and transparent structure, the tested high quality of built-in materials, the solely copper wound transformers and the installed 4-roller wire feeder unit. For heavy-duty work places we produce water-cooled variants besides the standard air-cooled series.

Besides the above traditional units, we also produce a corresponding series with SYNERG electronics, with the same technical parameters.

MM323, MM323W, MM323SYN, MM323WSYN welding units

This product family is designed for the production of light-weight steel structures and maintenance tasks both on-site and in workshops. The recommended welding wire thickness for steel (1–15mm) is 0,8/1,0/1,2mm. Owing to the built-in 4-roller wire feeder and soft start and burnback setting functions, these devices are excellent for welding aluminum and INOX structures. Technical parameters of the corresponding SYNERG variants are identical with those of the traditional series. On request, the devices are produced with water-cooling.

To see the technical parameters of a certain welding unit, click on the relevant image. To print out the technical summary, press the Print icon.

MM403, MM403W, MM403SYN, MM403WSYN welding units

This product family is designed for the production of medium-weight steel structures and maintenance tasks. Owing to their outstanding duty cycle, they are excellent for intensive, continuous tasks both on-site and in workshops. Type MM403W with water-cooling has proven to be highly successful for such tasks. The recommended welding wire thickness is 1,0/1,2mm, but excellent results are produced with 0,8mm wires in low ranges. Recommended material thickness is 1–20mm for steel. Owing to the built-in electronics, these devices are excellent for welding aluminum and INOX structures. Technical parameters of the corresponding SYNERG variants, which are suitable for varied tasks, are identical with those of the traditional series.

To see the technical parameters of a certain welding unit, click on the relevant image. To print out the technical summary, press the Print icon.

MM453, MM453W, MM453SYN, MM453WSYN welding units

This product family includes the largest compact welding units produced by Bmax Ltd. They are to be used for the production of medium and heavy-weight steel structures, the installation and maintenance of steel structures for buildings, and for heavy-duty tasks. Basically, they should be used with welding wires 0,8/1,0/1,2mm, but the built-in 4-roller wire feeder ensures that they operate excellently even with 1,6mm welding wire and 2,4mm fluxcored wire as well. We recommend these devices for welding 1–25mm thick steel. Technical parameters of the corresponding SYNERG variants are identical with those of the traditional series. Model MM453W is outstandingly productive for continuous high-current welding tasks owing to the built-in water-cooling cycle.

To see the technical parameters of a certain welding unit, click on the relevant image. To print out the technical summary, press the Print icon.

Datasheet for Compact industrial welding units
Type Mains voltage (V) Absorbed power (kVA) Mains fuse (A) Adjust­ment position Welding current (A) DC = 45%/60%/100% Wire (mm) Mat. thickness (mm) Size (mm) Weight (kg)
(SYN) Synergic / (W) Water cooled / (S) Separate wire feeder
MM323 3×400 12 3×25 3×7 35-320 320/270/215 0,8-1,2 0,8-15 880×390×770 105
MM323SW 3×400 12 3×25 3×7 35-320 320/270/215 0,8-1,2 0,8-15 960×540×1100 140
MM323SYN 3×400 12 3×25 3×7 35-320 320/270/215 0,8-1,2 0,8-15 880×390×770 105
MM323WSYN 3×400 12 3×25 3×7 35-320 320/270/215 0,8-1,2 0,8-15 960×540×1100 140
MM403 3×400 17 3×25 3×7 40-400 400/350/270 0,8-1,2 0,8-20 880×390×770 115
MM403W 3×400 17 3×25 3×7 40-400 400/350/270 0,8-1,2 0,8-20 960×540×1100 150
MM403SYN 3×400 17 3×25 3×7 40-400 400/350/270 0,8-1,2 0,8-20 880×390×770 115
MM403WSYN 3×400 17 3×25 3×7 40-400 400/350/270 0,8-1,2 0,8-20 960×540×1100 150
MM453 3×400 20 3×25 3×7 40-450 450/390/300 0,8-1,6 0,8-25 880×390×770 125
MM453W 3×400 20 3×25 3×7 40-450 450/390/300 0,8-1,6 0,8-25 960×540×1100 160
MM453SYN 3×400 20 3×25 3×7 40-450 450/390/300 0,8-1,6 0,8-25 880×390×770 125
MM453WSYN 3×400 20 3×25 3×7 40-450 450/390/300 0,8-1,6 0,8-25 960×540×1100 160
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Industrial welding units with a separate wire feeder

MM323S, MM323SW, MM403S, MM403SW, MM453S, MM453SW and the welding units in the corresponding SYNERG series are made up of three parts: the power source, a separate wire feeder and a connecting cable. This product family is recommended for light, medium-weight and heavy-weight steel structures both for on-site and workshop welding. This product line is especially suitable to construct or repair steel building structures and even large containers on-site, as the separate wire feeder makes safe welding inside a tank possible. The standard connecting cable is 10 meters long. However, on request the cable can be lengthened if the diameter of the welding cable inside is increased, both for air-cooled and water-cooled variants. This product line includes the general electronic control panel (2 phase, 4 phase, interval, spot welding) complemented with extra functions, such as soft start, burnback and gas post flow control (NG435).

MM323S, MM323SW, MM323SSYN, MM323SWSYN welding units

This product family is primarily used for the production and repair of light-weight steel structures and vehicle bodies. It is especially often used in the field of vehicle bodies, because only the separate wire feeder must be taken to the vehicle itself. Their excellent performance make them especially suitable for the production and repair of aluminum vehicle bodies. Recommended wire thickness for steel structures is 0,8/1,0/1,2mm, while for aluminum structures it is 1,0/1,2mm. The series can be used to weld 1–20mm thick materials. The product family also includes a SYNERG series.

To see the technical parameters of a certain welding unit, click on the relevant image. To print out the technical summary, press the Print icon.

MM403S, MM403SW, MM403SSYN, MM403SWSYN welding units

This product line including air-cooled and water-cooled devices is suitable for the production of medium and heavy-weight steel structures, and for the construction and repair of large containers in an industrial setting. The units include solely copper wound transformers cooled by a ventilation system ensures continuous work with 45% duty cycle. The optimal welding wire thickness is 1,0/1,2mm, but with a special wire feeder roller even 2,4mm fluxcored wire can be used. The recommended material thickness for steel is between 1 and 20mm. On request, the standard 10-meter-long connecting cable can be replaced by a longer one. Technical parameters of the corresponding SYNERG variants are identical with those of the traditional series.

To see the technical parameters of a certain welding unit, click on the relevant image. To print out the technical summary, press the Print icon.

MM453S, MM453SW, MM453SSYN, MM453SWSYN welding units

These welding units are the largest one in their category in Bmax’s product range. These industrial devices are excellent for the production of heavy steel structures. Owing to their wide welding current range, they are also suitable for welding thin sheets both on-site and in a workshop. On request, the standard 10 meter long connecting cable can be replaced by a longer one, especially for container construction tasks. The optimal welding wire thickness is 0,8/1,0/1,2/1,6mm, but fluxcored wires can be also be used up to the thickness of 2,4mm. Both types are available with SYNERG electronic system as well.

To see the technical parameters of a certain welding unit, click on the relevant image. To print out the technical summary, press the Print icon.

Datasheet for Industrial welding units with a separate wire feeder
Type Mains voltage (V) Absorbed power (kVA) Mains fuse (A) Adjust­ment position Welding current (A) DC = 45%/60%/100% Wire (mm) Mat. thickness (mm) Size (mm) Weight (kg)
(SYN) Synergic / (W) Water cooled / (S) Separate wire feeder
MM323S 3×400 12 3×25 3×7 35-320 320/270/215 0,8-1,2 0,8-15 880×390×1220 130
MM323SW 3×400 12 3×25 3×7 35-320 320/270/215 0,8-1,2 0,8-15 960×540×1550 150
MM323SSYN 3×400 12 3×25 3×7 35-320 320/270/215 0,8-1,2 0,8-15 880×390×1040 130
MM323SWSYN 3×400 12 3×25 3×7 35-320 320/270/215 0,8-1,2 0,8-15 960×540×1370 150
MM403S 3×400 17 3×25 3×7 40-400 400/350/270 0,8-1,2 0,8-20 880×390×1220 140
MM403SW 3×400 17 3×25 3×7 40-400 400/350/270 0,8-1,2 0,8-20 960×540×1550 160
MM403SSYN 3×400 17 3×25 3×7 40-400 400/350/270 0,8-1,2 0,8-20 750×380×600 140
MM403SWSYN 3×400 17 3×25 3×7 40-400 400/350/270 0,8-1,2 0,8-20 960×540×1370 160
MM453S 3×400 20 3×25 3×7 40-450 450/390/300 0,8-1,6 0,8-25 880×390×1220 150
MM453SW 3×400 20 3×25 3×7 40-450 450/390/300 0,8-1,6 0,8-25 960×540×1550 170
MM453SSYN 3×400 20 3×25 3×7 40-450 450/390/300 0,8-1,6 0,8-25 880×390×1040 150
MM453SWSYN 3×400 20 3×25 3×7 40-450 450/390/300 0,8-1,6 0,8-25 960×540×1370 170
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Heavy-duty industrial welding units

Bmax produces two heavy-duty industrial welding units: MM450SW and MM600SW, which are made up of three parts: the power source, a separate wire feeder and a 10 meter long connecting cable between these two parts. These devices are excellent for high current welding with an outstanding duty cycle. A great advantage for welding steel structures and large containers is that the power source need not be moved, as the separate wire feeder ensures mobility. The copper wound transformer is cooled by a ventilator, which together with the separate wire feeder ensures stable conditions for continuous welding. The devices include a digital voltmeter and ammeter. The meter saves the last measured data after concluding a task. The robust MB501 wire feeder has 4 rollers. Besides the traditional functions (2 phase, 4 phase, spot), the WEL1.2 electronics includes the following functions: wire threading, gas test, soft start, burnback, gas after flow control. Although we recommend these devices for the production of heavy-weight steel structures, with a suitable welding wire they can also be used for welding materials from the thickness of 2mm.

To see the technical parameters of a certain welding unit, click on the relevant image. To print out the technical summary, press the Print icon.

Datasheet for Heavy-duty industrial welding units
Type Mains voltage (V) Absorbed power (kVA) Mains fuse (A) Adjust­ment position Welding current (A) DC = 45%/60%/100% Wire (mm) Mat. thickness (mm) Size (mm) Weight (kg)
(SYN) Synergic / (W) Water cooled / (S) Separate wire feeder
MM450SW 3×400 22 3×35 3×10 40-450 -/450/350 0,8-2,4 0,8-25 960×540×1550 220
MM600SW 3×400 35 3×50 3×10 40-600 600/450/350 0,8-2,4 0,8-25 880×390×1040 235
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