INWELT LT Series HF Plasma Cutting Torches – Manual & CNC Models

LT Series HF Plasma Cutting Torches for Manual and CNC Applications

The INWELT LT Series is a family of air-cooled HF plasma cutting torches designed for professional manual and mechanized metal cutting.

The current product range includes three handheld LT models and three CNC-oriented LTM machine torches:

• LT50 – 50A manual plasma cutting torch

• LT70 – 70A manual plasma cutting torch

• LT100 – 100A manual plasma cutting torch

• LTM81 – 80A CNC plasma cutting torch

• LTM101 – 100A CNC plasma cutting torch

• LTM141 – 140A CNC plasma cutting torch

These models are intended for compatible plasma power sources using high-frequency arc-starting systems.

The LT Series supports multiple current classes, torch geometries, cable assemblies, rear connections and consumable families for equipment manufacturers, distributors, importers and industrial users.

LT Series Model Comparison

Model	Rated Current	Operation	Starting Method	Cooling	Standard Lead
LT50	50A	Manual / Handheld	HF	Air	6 m
LT70	70A	Manual / Handheld	HF	Air	6 m
LT100	100A	Manual / Handheld	HF	Air	6 m
LTM81	80A	CNC / Mechanized	HF	Air	6 m
LTM101	100A	CNC / Mechanized	HF	Air	6 m
LTM141	140A	CNC / Mechanized	HF	Air	6 m standard

Always check the individual product page before ordering because gas flow, pressure, post-flow time, consumables and connector options vary by model.

LT Manual Plasma Cutting Torches

The LT handheld range is designed for operators who require a manual plasma torch for fabrication, maintenance and repair.

LT50 50A Manual Plasma Cutting Torch

The LT50 is the lower-current manual model within the current LT category.

It is designed for compatible 50A HF plasma cutting systems and uses an air-cooled torch architecture.

Typical buyers include:

• Plasma cutter manufacturers

• Welding and cutting equipment distributors

• Repair companies

• Industrial maintenance suppliers

• Aftermarket torch and consumable brands

The LT50 product page should be used to confirm its exact pressure, airflow, connector and consumable specifications.

LT70 70A Manual Plasma Cutting Torch

The LT70 provides additional current capacity for compatible 70A HF plasma systems.

The current INWELT platform is air cooled and available with multiple rear-connection configurations.

Compared with the LT50, the LT70 is intended for applications requiring a higher torch current rating.

Do not select the LT70 only according to amperage. The HF starting system, connector, pilot-arc circuit and trigger wiring must also match the plasma cutter.

LT100 100A Manual Plasma Cutting Torch

The LT100 is the highest-current handheld model currently displayed in the LT Series category.

The current INWELT configuration is designed around:

• 100A rated current

• HF starting

• Air cooling

• 60% duty cycle

• 6 m standard lead

• Multiple rear-connection options

• Standard and extended consumable configurations

The LT100 should remain clearly positioned as a manual / handheld torch.

For CNC and fixed machine applications, select an LTM-series machine torch.

LTM CNC and Mechanized Plasma Cutting Torches

The LTM range is designed for fixed mounting on CNC plasma tables and automated cutting systems.

Unlike handheld LT torches, LTM models use machine-oriented torch geometry and are controlled through the plasma power source and CNC system.

LTM81 80A CNC Plasma Cutting Torch

The LTM81 is an 80A HF machine torch designed for compatible mechanized plasma systems.

The current INWELT configuration includes:

• 80A rated current

• 60% duty cycle

• HF arc starting

• Air cooling

• Approx. 4.5–5.0 bar operating pressure

• Approx. 160 L/min airflow

• 6 m standard torch lead

Multiple machine interfaces and matching consumables are available.

For CNC integration, confirm the machine-torch body dimensions, connector, pilot-arc arrangement and power-source architecture.

LTM101 100A CNC Plasma Cutting Torch

The LTM101 is positioned as a 100A HF mechanized plasma torch.

The current INWELT configuration is designed around:

• 100A rated current

• 60% duty cycle

• HF starting

• Air cooling

• Approx. 4.5–5.0 bar operating pressure

• Approx. 180 L/min airflow

• Approx. 100-second recommended post-flow

• 6 m standard lead

The product family includes multiple threaded and central-adapter connections together with standard and extended consumables.

LTM141 140A CNC Plasma Cutting Torch

The LTM141 is the highest-current machine torch currently displayed in the LT Series category.

The current platform is designed around:

• 140A rated current

• 60% duty cycle

• HF starting

• Compressed-air operation

• Approx. 4.5–5.0 bar operating pressure

• Approx. 220 L/min airflow

• Approx. 140-second recommended post-flow

• 6 m standard lead

• 12 m configurations available

The LTM141 is intended for higher-current CNC and mechanized cutting applications.

The plasma power source, connector, pilot-arc circuit, CNC interface and consumables must all be confirmed before installation.

LT vs. LTM Plasma Cutting Torches

The most important distinction within the LT Series is the difference between manual LT torches and mechanized LTM torches.

Feature	LT Manual Torches	LTM Machine Torches
Operation	Manual / Handheld	CNC / Mechanized
Torch Geometry	Handheld	Straight machine torch
Start Control	Operator trigger	Machine controlled
Mounting	Handheld	Fixed torch holder
Torch Height	Operator controlled	CNC / THC controlled
Primary Use	Manual fabrication and repair	Automated production
Examples	LT50 / LT70 / LT100	LTM81 / LTM101 / LTM141

Do not choose between LT and LTM models according to amperage alone.

A manual torch and machine torch with similar current ratings can still have different torch heads, cable assemblies, control systems and mounting requirements.

How to Choose the Correct LT Series Plasma Torch

A professional replacement torch should be selected by technical compatibility rather than product appearance.

Step 1: Confirm Manual or CNC Operation

Choose an LT model for handheld cutting.

Choose an LTM model for fixed CNC or mechanized cutting.

Step 2: Confirm the Plasma Power Source Current

Select a torch with a verified rating appropriate for the plasma power source.

Current LT Series classes include:

• 50A

• 70A

• 80A

• 100A

• 140A

Do not routinely operate a torch above its verified current rating.

Step 3: Confirm HF Arc Starting

The LT Series products on this page are designed around HF arc-starting systems.

They should not be treated as interchangeable with non-HF or back-striking torch platforms.

Step 4: Confirm the Rear Connection

Depending on model, available interfaces can include:

• 1/8G

• 1/4G

• 3/8G

• M14×1

• M16×1.5

• Central adapter

The exact connector range depends on the torch model.

Step 5: Confirm Pilot Arc and Control Wiring

A matching thread or central connector does not guarantee complete compatibility.

The pilot-arc circuit, trigger or CNC control signals and internal wiring must also match the plasma power source.

Step 6: Confirm Gas Requirements

Each torch model has its own verified pressure and airflow requirements.

Do not apply one LT model's air setting to every torch in the series.

LT Series HF Arc Starting

The LT Series shown on this page uses high-frequency arc starting.

HF ignition uses high-frequency electrical energy to assist in establishing the initial plasma arc.

This must match the plasma power source architecture.

HF Manual Torch Applications

For LT50, LT70 and LT100 hand torches, the HF system works together with the manual trigger and power-source control circuit.

HF CNC Applications

For LTM81, LTM101 and LTM141 machine torches, HF ignition must be integrated correctly with the CNC cutting system.

Machine builders should follow the plasma power-source requirements for:

• Grounding

• Signal-cable routing

• Power-cable separation

• CNC controller installation

• Work connection

• Torch lead routing

HF compatibility should be confirmed before retrofitting a machine torch to an existing CNC system.

LT Series Consumables and Replacement Parts

The LT Series is supported by a broad aftermarket consumable and spare-parts program.

Depending on torch model, available parts can include:

• Cutting tips

• Extended cutting tips

• Electrodes

• Extended electrodes

• Gas diffusers

• Air tubes

• Outside nozzles

• Retaining components

• Stand-off spacers

• Contact-cutting accessories

• Gouging components

• Torch heads

• O-rings

• Handles

• Triggers

• Fiberglass positioning tubes

• Cable assemblies

• Connector adapters

Exact part numbers should always be matched to the specific LT or LTM model.

Why Exact Consumable Matching Matters

A plasma consumable should not be selected only because it physically fits the torch.

Important variables include:

• Torch model

• Cutting current

• Tip diameter

• Electrode type

• Diffuser

• Standard or extended configuration

• Cutting or gouging process

• Hand or machine application

Incorrect consumable combinations can contribute to:

• Difficult arc starting

• Short consumable life

• Excessive bevel

• Unstable plasma flow

• Poor cutting consistency

Use the individual model page and verified INWELT part-number tables when ordering replacement consumables.

LT Series Connector and Cable Options

One of the strengths of the LT Series is the availability of multiple connection arrangements.

Depending on model, INWELT can provide:

• Threaded power/gas connections

• Central adapters

• Different pilot-arc arrangements

• Manual torch cable assemblies

• Machine torch cable assemblies

• 6 m leads

• Selected longer lead configurations

For OEM or replacement projects, send photographs of the original machine connector and control connection together with the plasma cutter model.

This is more reliable than selecting a torch from amperage alone.

What Metals Can LT Series Plasma Torches Cut?

When used with a compatible plasma power source, LT Series torches can cut electrically conductive materials including:

• Mild steel

• Carbon steel

• Stainless steel

• Aluminum

• Copper

• Brass

• Galvanized steel

The torch family alone does not determine one universal cutting thickness.

Material, power source, current, gas pressure, cutting speed and consumables all affect actual cutting performance.

How Thick Can an LT Series Plasma Torch Cut?

There is no single cutting-thickness figure that applies to every LT Series model.

Cutting capacity is a complete plasma-system property and depends on:

• Plasma power source

• Input power

• Torch model

• Material

• Cutting current

• Tip diameter

• Air pressure

• Airflow

• Travel speed

• Torch height or stand-off

• Consumable condition

• Required edge quality

Professional plasma specifications normally distinguish between:

Recommended Cutting Capacity

Material thickness that can be cut productively with suitable edge quality and speed.

Maximum Cutting Capacity

Thicker material that can still be cut at reduced speed.

Severance Capacity

The maximum material thickness that can be separated, generally with lower edge quality.

For accurate performance information, use the tested cut chart for the specific plasma power source and torch combination.

Build Model-Specific INWELT Cut Charts

A single generic LT Series cutting-thickness table should not be used for every model.

Instead, INWELT should develop first-party cut charts for individual torch and power-source combinations.

Recommended fields include:

Parameter	Data to Publish
Torch Model	LT50 / LT70 / LT100 / LTM81 / LTM101 / LTM141
Material	Mild Steel / Stainless / Aluminum
Thickness	Tested thickness
Current	Actual tested current
Tip Code	INWELT part number
Tip Diameter	mm
Air Pressure	bar
Air Flow	L/min
Cutting Speed	mm/min
Torch Height / Stand-Off	mm
Result	Recommended / Maximum / Severance

First-party cutting data is more useful to professional buyers than generic cutting-capacity claims.

Manual Plasma Cutting Applications

LT50, LT70 and LT100 handheld torches are suitable for professional manual applications such as:

• General metal fabrication

• Industrial maintenance

• Structural repair

• Machinery repair

• Automotive and truck repair

• Agricultural equipment

• Construction equipment

• Field maintenance

• Plate cutting

• Workshop fabrication

The appropriate model should be selected according to the plasma power source and required current.

CNC and Mechanized Plasma Cutting Applications

LTM81, LTM101 and LTM141 machine torches are intended for automated applications such as:

• CNC plasma cutting tables

• Automated profile cutting

• Sheet-metal production

• Structural steel fabrication

• Machinery components

• Agricultural equipment parts

• Construction equipment

• Truck and trailer fabrication

• Industrial production cells

• Plate-processing systems

For machine applications, confirm torch mounting, CNC control, HF compatibility and cable routing before installation.

LT Series Maintenance and Consumable Inspection

Regular inspection helps maintain stable operation across the LT Series.

Inspect the Electrode

Replace an excessively worn electrode before it contributes to difficult starting or damages the cutting nozzle.

Inspect the Cutting Tip

Check for:

• Enlarged nozzle opening

• Oval orifice

• Burn damage

• Heavy contamination

Inspect the Diffuser

Keep gas passages clean.

Replace cracked or heat-damaged components.

Inspect O-Rings and Seals

Replace damaged seals if gas leakage occurs.

Inspect Torch Cables

Check for:

• Abrasion

• Cuts

• Heat damage

• Tight bends

• Loose fittings

Inspect Machine-Torch Mounting

For LTM models, also inspect:

• Torch clamp

• Torch perpendicularity

• Positioning tube

• Cable routing

• Z-axis clearance

Common LT Series Plasma Cutting Problems

Difficult Arc Starting

Check:

• Electrode condition

• Cutting tip

• HF starting circuit

• Gas pressure

• Work connection

• Torch connector

Excessive Dross

Check:

• Cutting speed

• Current

• Material thickness

• Gas supply

• Torch height or stand-off

• Consumable condition

Excessive Bevel

Check:

• Cutting tip

• Torch angle or machine perpendicularity

• Cutting height

• Travel speed

• Gas flow

Short Consumable Life

Possible causes include:

• Wet or contaminated compressed air

• Incorrect current-to-tip combination

• Excessive piercing

• Incorrect torch distance

• Worn electrode

Troubleshooting should always be based on the specific LT model and plasma power source.

LT Series for Distributors and Aftermarket Supply

The LT Series is suitable for professional distributors and aftermarket suppliers because the product family combines complete torches with replacement consumables and service components.

A distributor program can include:

• Complete manual torches

• Complete CNC machine torches

• Cutting tips

• Electrodes

• Diffusers

• Torch heads

• Cable assemblies

• Connector adapters

• Consumable kits

• Repair components

This allows buyers to support both initial torch sales and recurring aftermarket demand.

OEM LT Series Plasma Cutting Torch Manufacturing by INWELT

INWELT supplies LT Series plasma cutting torches and consumables to professional B2B customers including:

• Plasma cutter manufacturers

• CNC plasma machine manufacturers

• Welding and cutting equipment brands

• CNC system integrators

• Importers

• Distributors

• Wholesalers

• Industrial suppliers

• Aftermarket consumable companies

OEM and ODM configurations can be evaluated according to the plasma power source, target market and required torch interface.

OEM and Private-Label Options

Available customization can include:

• Customer branding

• Product labels

• Handle marking

• Machine-torch configurations

• Cable length

• Rear connectors

• Central adapters

• Consumable kits

• Private-label packaging

• Manuals and technical labels

• Barcode and carton requirements

For OEM projects, provide the target plasma power source, torch type, connector specification and estimated order quantity.

Why Source LT Series Plasma Torches from INWELT?

The INWELT LT Series combines multiple current classes, manual and machine torch configurations, replacement consumables and connector options within one product family.

The current range includes:

• 50A manual torch

• 70A manual torch

• 100A manual torch

• 80A CNC machine torch

• 100A CNC machine torch

• 140A CNC machine torch

• Complete torch assemblies

• Replacement consumables

• Cable assemblies

• Connector adapters

• OEM and private-label options

For equipment brands, distributors and importers, sourcing related torch models and replacement parts through one supplier can simplify purchasing and aftermarket support.

Frequently Asked Questions About LT Series Plasma Cutting Torches

What is the INWELT LT Series?

The LT Series is a family of air-cooled HF plasma cutting torches covering manual and CNC/mechanized configurations.

Which LT Series models are manual torches?

The current manual models displayed in this category are:

• LT50

• LT70

• LT100

Which LT Series models are CNC machine torches?

The current machine-torch models are:

• LTM81

• LTM101

• LTM141

What current ratings are available?

The current category covers models rated from approximately 50A to 140A.

Always check the individual model page for the exact specification.

Do LT Series torches use HF ignition?

The products currently grouped in this LT category are designed around high-frequency arc starting.

Confirm compatibility with the plasma power source before ordering.

Are LT and LTM torches interchangeable?

No.

LT models are primarily handheld torches, while LTM models are designed for machine/CNC operation.

Some consumables may be shared, but the complete torch assemblies are not automatically interchangeable.

What gas do LT Series torches use?

The current models use compressed-air-based plasma torch configurations.

Exact pressure and airflow vary by model.

What lead lengths are available?

Most current product configurations use a 6 m standard lead.

Selected machine-torch models also have longer configurations available.

What connector options are available?

Depending on model, options can include threaded connectors such as 1/8G, 1/4G, 3/8G, M14×1 and M16×1.5 together with central-adapter configurations.

Can LT Series torches cut stainless steel?

Yes, when used with a compatible plasma power source and appropriate cutting parameters.

Can LT Series torches cut aluminum?

Yes.

Aluminum is electrically conductive and can be plasma cut with a properly configured plasma system.

How thick can an LT Series torch cut?

There is no single thickness specification for the entire series.

Cutting capacity depends on the specific torch, plasma power source, current, material, consumables and process parameters.

Are replacement consumables available?

Yes.

INWELT supplies cutting tips, electrodes, diffusers, torch heads, cable assemblies and other replacement components for supported LT Series configurations.

Does INWELT offer OEM LT Series plasma torches?

Yes.

OEM/ODM, private-label, cable, connector and consumable-kit options are available for qualified equipment manufacturers, distributors and importers.

Request a Quote for INWELT LT Series Plasma Cutting Torches

For faster model and compatibility confirmation, provide:

• Plasma cutter brand and model

• Rated output current

• Existing torch model

• Manual or CNC application

• HF starting requirement

• Main connector photographs

• Pilot-arc or control connector photographs

• Required lead length

• Required consumables

• Estimated order quantity

• INWELT or private-label branding

INWELT can then recommend the appropriate LT or LTM torch configuration for your plasma cutting system.