The INWELT TW Series is a family of gas-cooled MIG/MAG welding guns designed for professional fabrication, repair, industrial production and aftermarket replacement applications.
The current product range includes:
TW200 – 200A CO₂ gas-cooled MIG welding gun
TW300 – 300A CO₂ gas-cooled MIG welding gun
TW400 – 400A CO₂ gas-cooled MIG welding gun
All current TW Series models use gas-cooled torch architectures and are rated at a 60% duty cycle according to the current INWELT product specifications.
The series covers welding-wire diameters from 0.6 mm to 2.0 mm and supports multiple cable lengths, front-end consumables and rear-connector configurations.
| Model | Cooling | CO₂ Rating | Mixed-Gas Rating | Duty Cycle | Wire Size | Cable Length |
|---|---|---|---|---|---|---|
| TW200 | Gas Cooled | 200A | 150A | 60% | 0.6–1.2 mm | 3 / 4 / 5 m |
| TW300 | Gas Cooled | 300A | 250A | 60% | 0.8–1.6 mm | 3 / 4 / 5 m |
| TW400 | Gas Cooled | 400A | 350A | 60% | 0.8–2.0 mm | 3 / 4 / 5 m |
These are current INWELT product specifications.
Similarly named Tweco-style MIG guns from other manufacturers may use different current ratings, wire ranges, consumables or rear connectors.
Always select replacement torches according to the verified INWELT specification and welding-machine interface.
The TW200 is the lower-current model in the current INWELT TW Series.
Current specifications include:
200A with CO₂
150A with mixed shielding gas
60% duty cycle
0.6–1.2 mm welding wire
Gas-cooled construction
3 m / 4 m / 5 m cable options
Approx. 12.7 mm gas nozzle
Replaceable Tweco-style front-end consumables
The TW200 is suited to medium-duty welding applications where a relatively compact and maneuverable MIG gun is required.
Typical applications include:
Automotive repair
Agricultural equipment
General fabrication
Workshop welding
Machinery maintenance
Metal repair
The TW300 provides additional welding-current capacity for professional fabrication and industrial maintenance.
Current INWELT specifications include:
300A with CO₂
250A with mixed shielding gas
60% duty cycle
0.8–1.6 mm welding wire
Gas-cooled construction
3 m / 4 m / 5 m cable options
Approx. 16 mm gas nozzle
Replaceable Tweco-style consumables
The TW300 is suitable for applications requiring more current capacity than the TW200 while maintaining a gas-cooled torch architecture.
Typical applications include:
Machinery manufacturing
Structural fabrication
Agricultural machinery
Automotive fabrication
Industrial maintenance
General production welding
The TW400 is the highest-current model currently displayed in the INWELT TW Series.
Current specifications include:
400A with CO₂
350A with mixed shielding gas
60% duty cycle
0.8–2.0 mm welding wire
Gas-cooled construction
3 m / 4 m / 5 m cable options
Approx. 16 mm gas nozzle
Multiple rear-adapter options
The TW400 is designed for heavier fabrication and production applications requiring higher current and larger welding-wire diameters.
Typical applications include:
Structural steel fabrication
Heavy machinery
Construction equipment
Truck and trailer production
Agricultural machinery
Industrial manufacturing
The correct MIG welding gun should be selected according to the actual welding process rather than model name alone.
Current INWELT CO₂ ratings are:
TW200 – 200A
TW300 – 300A
TW400 – 400A
Do not continuously operate a torch above its verified current rating.
MIG/MAG torch ratings can differ between CO₂ and mixed shielding gas.
Current INWELT ratings are:
| Model | CO₂ | Mixed Gas |
|---|---|---|
| TW200 | 200A | 150A |
| TW300 | 300A | 250A |
| TW400 | 400A | 350A |
Always use the correct gas-specific rating when selecting a torch.
Current wire-size ranges are:
TW200 – 0.6–1.2 mm
TW300 – 0.8–1.6 mm
TW400 – 0.8–2.0 mm
The contact tip, liner, drive rolls and wire-feed system must all match the selected wire diameter.
The current TW200, TW300 and TW400 specifications use a 60% duty-cycle rating.
Actual torch temperature is also affected by:
Welding current
Shielding gas
Arc-on time
Wire size
Ambient temperature
Cable condition
Electrical connection
Current standard options include:
3 m
4 m
5 m
Custom lengths can be evaluated for OEM projects.
Longer cables require correct liner selection and wire-feed setup to maintain stable feeding.
The INWELT TW Series is designed around common Tweco-style MIG gun and consumable formats for professional replacement and aftermarket applications.
Compatibility should be confirmed by technical configuration rather than the TW model name alone.
Before ordering, verify:
Welding-current rating
Duty cycle
Wire diameter
Contact-tip system
Gas diffuser
Gas nozzle
Liner
Torch head
Cable length
Rear connector
Trigger/control connection
A similar torch shape or model number does not automatically guarantee complete compatibility.
Different welding machines and wire feeders use different rear interfaces.
Depending on model and configuration, TW Series options can include:
Tweco-style rear connection
Euro adapter
Miller-style adapter
Other OEM-specific connections
For example, current TW400 configurations include Tweco-format, Euro-adapter and Miller-adapter complete torch assemblies.
Before ordering, confirm:
Power connection
Trigger circuit
Gas passage
Wire-guide position
Liner interface
Machine-side socket
Providing a photograph of the existing torch connector is recommended for replacement projects.
The contact tip transfers welding current to the electrode wire while guiding the wire into the welding arc.
The TW Series supports multiple wire diameters according to model.
Contact-tip selection should consider:
Welding-wire diameter
Wire material
Contact-tip thread
Tip length
Torch model
Welding current
TW400 configurations, for example, use Tweco-style 14-Series-type contact-tip formats on current product assemblies.
Do not select a contact tip only by wire diameter.
The diffuser and front-end geometry must also match.
The gas diffuser distributes shielding gas around the electrode wire and supports the contact-tip system.
Correct diffuser selection contributes to:
Stable gas distribution
Correct contact-tip positioning
Proper gas-nozzle installation
Reliable front-end electrical connection
Inspect diffusers for:
Spatter buildup
Damaged threads
Blocked gas holes
Heat damage
Loose fit
Replace damaged components rather than modifying gas passages.
The gas nozzle directs shielding gas around the welding arc and weld pool.
Current TW models use different nozzle sizes according to torch design.
The TW200 currently uses an approximately 12.7 mm nozzle, while TW300 and TW400 configurations use larger front-end nozzle options.
Nozzle selection can affect:
Gas coverage
Electrode stick-out
Joint access
Spatter accumulation
Visibility
Inspect the nozzle regularly and clean or replace it according to actual welding conditions.
The liner guides welding wire through the MIG gun cable.
Correct liner selection is critical for stable wire feeding.
Consider:
Welding-wire diameter
Wire material
Cable length
Torch model
Wire-feeder setup
A worn or incorrectly sized liner can contribute to:
Irregular wire feeding
Bird-nesting
Increased wire resistance
Arc instability
Premature contact-tip wear
For TW400, current product assemblies include steel-liner configurations for specific wire-size ranges.
The torch head or conductor tube carries:
Welding current
Welding wire
Shielding gas
from the cable assembly to the front-end consumables.
Different TW models use model-specific conductor tubes and neck geometries.
For example, the current TW400 product family includes a 60-degree torch-head configuration.
Before replacing a conductor tube, verify:
Torch model
Neck geometry
Contact-tip system
Diffuser
Nozzle
Mechanical interface
The current TW200, TW300 and TW400 products are gas-cooled MIG welding guns.
They do not require an external liquid-cooling unit.
Gas-cooled construction provides a relatively simple torch system for applications where current and duty-cycle requirements remain within the verified rating.
The appropriate torch should be selected according to the actual production cycle rather than assuming that a higher model number is always necessary.
The main differences between current INWELT TW models are current rating and wire-size range.
| Model | CO₂ Rating | Mixed Gas | Wire Size | Typical Position |
|---|---|---|---|---|
| TW200 | 200A | 150A | 0.6–1.2 mm | Medium-duty |
| TW300 | 300A | 250A | 0.8–1.6 mm | Medium/heavy-duty |
| TW400 | 400A | 350A | 0.8–2.0 mm | Heavy-duty |
The final choice should also consider:
Duty cycle
Cable length
Welding machine
Rear connector
Consumable system
Wire feeder
When configured with the correct welding wire, liner, contact tip, shielding gas and welding parameters, TW Series MIG/MAG guns can support welding of materials including:
Carbon steel
Mild steel
Stainless steel
Selected configurations can also be used for other wire types when the liner and feeding system are correctly matched.
The torch itself does not determine material compatibility.
The complete welding process must match the base material and filler wire.
Depending on model, current TW Series guns are suitable for professional applications including:
General metal fabrication
Structural steel
Automotive manufacturing and repair
Agricultural machinery
Construction equipment
Truck and trailer fabrication
Machinery manufacturing
Industrial maintenance
Production welding
Choose the torch according to actual welding current, shielding gas, wire diameter and production duty.
There is no universal replacement interval for MIG gun consumables.
Service life depends on:
Welding current
Duty cycle
Wire diameter
Wire material
Shielding gas
Spatter level
Welding position
Contact-tip quality
Liner condition
Operator technique
Inspect consumables when welding performance changes.
Common signs include:
Unstable arc
Irregular wire feeding
Burn-back
Excessive spatter
Poor gas shielding
Damaged nozzle
Increased electrical resistance
Replace components according to actual wear rather than a fixed number of operating hours.
Check:
Liner condition
Contact-tip size
Cable bends
Drive-roll pressure
Welding-wire quality
Check:
Welding voltage
Wire-feed speed
Shielding gas
Contact-tip condition
Nozzle condition
Electrode stick-out
Possible causes include:
Welding above the verified rating
Exceeding duty cycle
Loose electrical connections
Damaged cable assembly
Worn contact tip
Excessive continuous welding
Check:
Gas nozzle
Diffuser
Gas flow
Gas leakage
Spatter blockage
Wind or drafts
Troubleshooting should consider the complete welding system rather than the torch alone.
The TW Series is suitable for distributors that require both complete welding guns and recurring replacement consumables.
A professional product program can include:
TW200 complete MIG guns
TW300 complete MIG guns
TW400 complete MIG guns
Contact tips
Gas nozzles
Gas diffusers
Insulators
Conductor tubes
Torch heads
Triggers
Handles
Liners
Cable assemblies
Rear adapters
Consumable kits
Publishing exact INWELT part numbers helps distributors reduce replacement errors and manage inventory more accurately.
INWELT supplies TW Series MIG/MAG welding guns and replacement parts to professional B2B customers including:
Welding machine manufacturers
Welding equipment brands
Importers
Distributors
Wholesalers
Industrial suppliers
Repair companies
Aftermarket consumable brands
OEM and ODM configurations can be developed according to the target welding machine and market requirements.
Customization may include:
Customer branding
Handle marking
Product labels
Cable length
Rear connector
Contact-tip configuration
Liner configuration
Consumable kits
Private-label packaging
Manuals
Barcodes
Carton requirements
For OEM projects, provide the welding-machine model, required current, shielding gas, wire diameter, rear connector and estimated purchasing quantity.
The INWELT TW Series combines three gas-cooled current classes with a serviceable Tweco-style consumable and connector system.
The current range includes:
TW200 – 200A CO₂
TW300 – 300A CO₂
TW400 – 400A CO₂
60% duty-cycle models
0.6–2.0 mm total wire-size coverage
3 m / 4 m / 5 m cable options
Tweco-style contact tips
Gas nozzles
Diffusers
Welding liners
Torch heads
Cable assemblies
Multiple rear-adapter options
OEM/private-label supply
For welding equipment brands, distributors and importers, sourcing complete guns and replacement parts through one supplier can simplify purchasing and aftermarket support.
The current range includes:
TW200
TW300
TW400
The current TW200, TW300 and TW400 products are gas cooled.
The current INWELT TW200 specification is:
200A CO₂
150A mixed gas
60% duty cycle
The current INWELT TW300 specification is:
300A CO₂
250A mixed gas
60% duty cycle
The current INWELT TW400 specification is:
400A CO₂
350A mixed gas
60% duty cycle
The current TW400 supports welding wire up to approximately 2.0 mm.
Current standard configurations include:
3 m
4 m
5 m
Custom cable lengths can be evaluated for OEM projects.
The TW Series is designed around common Tweco-style consumable formats.
However, contact tips, diffusers, nozzles, liners and rear connectors should always be confirmed by part number and torch configuration.
No.
Current rating, duty cycle, wire size, cable length, consumables and rear connector can vary significantly between products.
No.
The TW Series is independently manufactured by INWELT.
Third-party trademarks and model references are used only to describe replacement or compatibility formats where applicable.
Not necessarily.
INWELT uses its own current product specifications.
Similarly named third-party torch models can have different wire ranges, gas ratings or consumable configurations.
Yes, when configured with the correct wire, shielding gas, liner, contact tip and welding parameters.
Yes.
OEM/ODM, private labeling, cable customization, connector configuration, consumable kits and packaging customization are available for qualified B2B customers.
For faster model selection and compatibility confirmation, provide:
Welding machine manufacturer and model
Wire-feeder model
Required welding current
CO₂ or mixed-gas application
Welding-wire diameter
Existing MIG gun model
Rear connector photograph
Required cable length
Required consumables
Estimated purchasing quantity
INWELT or private-label branding
INWELT can then recommend the appropriate TW200, TW300 or TW400 configuration for your welding system.
