CK Worldwide MT375-AC/DC TIG Welding System

Name: CK Worldwide MT375-AC/DC TIG Welding System – Brochure
Brand: CK Worldwide
SKU: MT375-AC/DC

Complete 375 A water-cooled AC/DC TIG system on a cart

The CK Worldwide MT375-AC/DC is a dual-voltage inverter TIG welding system for 230 V or 460 V single-phase supplies. On 460 V it delivers up to 375 A DC and 360 A AC for TIG, and up to 300 A DC for stick welding; on 230 V the TIG ranges are 275 A DC and 260 A AC. It is sold as a complete system, with the power source, a dual-pump WC375 water cooler and a utility cart, plus a TL18 flex-head water-cooled torch.

The control panel uses analog dials for AC balance, AC frequency, post-flow and pulse settings, with high-frequency arc start. CK Worldwide’s Steady-Grip foot pedal is included: the red foot pedal quick-releases and converts to fingertip amperage control on the torch.

Technical specifications

Parameter	Specification
Manufacturer / model	CK Worldwide / MT375-AC/DC water-cooled TIG welding system
Processes	GTAW (TIG) AC/DC with high-frequency arc start; SMAW (stick), DC
Input voltage	230 VAC +/-10% or 460 VAC +/-10%, 50/60 Hz, single phase
Input current	230 V: 44 A / 26 A; 460 V: 38 A / 23 A
GTAW output range, 230 V	5 – 275 A DC; 5 – 260 A AC
GTAW output range, 460 V	5 – 375 A DC; 5 – 360 A AC
SMAW output range	230 V: 10 – 200 A DC; 460 V: 10 – 300 A DC
Rated output GTAW, 230 V	275 A at 21.0 VDC, 35% duty; 260 A at 20.4 VAC, 35% duty
Rated output GTAW, 460 V	375 A at 25.0 VDC, 35% duty; 360 A at 24.2 VAC, 35% duty
Rated output SMAW	230 V: 200 A at 28.0 VDC, 40% duty; 460 V: 300 A at 32.0 VDC, 40% duty
Maximum open circuit voltage	84 V
Gas pre-flow / post-flow	0.5 s / 0.5 – 20 s
AC frequency / pulse frequency	20 – 200 Hz / 1 – 200 Hz
Pulse width / base current	50% / 10 – 100%
Machine dimensions H x W x L	381 x 267 x 521 mm (15 x 10.5 x 20.5 in)
Machine weight	14.5 kg (82 lb)
WC375 water cooler input	110 VAC, 50/60 Hz, 5 A maximum
WC375 capacity / heat rating	9 litres (2.5 gal) / 14,200 BTU maximum
WC375 coolant	Binzel BTC-15 recommended; 80% distilled water, 20% organic coolant
WC375 dimensions H x W x L	457 x 267 x 610 mm (18 x 10.5 x 24 in)
Certification shown in brochure	CSA E60974-1

What the system includes

CK Worldwide lists the complete welding system as follows.

Item	Details
MT375-AC/DC machine with utility cart
WC375 dual-pump water cooler
TL18 flex-head torch with 3.8 m (12.5 ft) Super-Flex cables	TL18-12SF FX, 350 A ACHF or DCSP at 100%, water-cooled
Dinse connector	SLWHAT-35
Gas Saver Series 3 accessory and consumable kit	AK-3GS
Steady-Grip foot pedal amperage control
Ground clamp with 3.8 m cable
Single-flow regulator
Nylon zipper hose cover	CC-3-10
Gas hose, 1.8 m (6 ft)	ARH-6

Applications and installation planning

With AC output and pulse, the MT375 covers aluminium and magnesium TIG as well as DC TIG on stainless and carbon steel, and the stick mode allows electrode repair work from the same machine. The 35% rating at full TIG output means long welds at maximum current should be planned around the duty cycle; at lower currents the machine runs continuously for longer.

Before installation, confirm the available supply: 230 V draws 44 A at maximum and 460 V draws 38 A, with the effective currents being lower (26 A and 23 A). The water cooler takes a separate 110 V, 5 A supply and holds 9 litres of coolant, for which CK recommends a mix of 80% distilled water and 20% organic coolant (Binzel BTC-15 recommended). Other CK Worldwide torches are listed separately, for example the CK20 water-cooled TIG torch.

Documents and quotation

The attached CK Worldwide MT375-AC/DC brochure (form MT375) contains the system contents, machine and cooler specifications and the Steady-Grip pedal details. More machines are listed under TIG welding machines.

For a quotation, state the available supply voltage, the torch and cable length needed and any spare consumable kits required.

CK Worldwide product groups

The TIG torch program covers the Standard, MasterTIG, Diamond and UltraTIG series, machine torches and Airco torches, in gas-cooled and water-cooled versions. Accessories include Gas Saver kits, wedge collets, cables and hoses, cable connectors, trailing shields, purge cups and torch parts. The range also includes remote amperage controls, cold wire feed equipment, a purge chamber, tungsten electrodes with a grinder, and TIG machines with a water cooler.

Frequently Asked Questions