New TECNA 4668N 50 kVA Linear Action Spot Welder

New TECNA 4668N 50 kVA pneumatic linear-action spot welder for sale in Ireland. TE101 control, 500 mm throat, water cooling and two-stage foot pedal.

Heavy-Duty Pneumatic Resistance Spot Welder with TE101 Microprocessor Control

The TECNA 4668N is a heavy-duty, pedestal-mounted pneumatic spot welder designed for accurate and repeatable resistance spot welding in fabrication, sheet-metal, automotive-component and general engineering applications.

The TECNA 4668N combines a 50 kVA nominal rating, linear electrode movement, a 500 mm throat depth and microprocessor-controlled weld sequencing. Its rigid stationary frame, pneumatic operation and water-cooled welding circuit make it suitable for demanding workshop and production environments requiring consistent weld quality.

TECNA article number: 4668N

Main Features

• New TECNA industrial spot welder
• 50 kVA nominal power at 50% duty cycle
• Linear-action electrode movement
• 500 mm throat depth
• 280 mm standard arm gap
• Pneumatic electrode operation
• TECNA TE101 microprocessor weld control
• Water-cooled transformer
• Water-cooled arms, electrode holders and electrodes
• Heavy-duty chrome-copper electrode holders
• Double-stroke pneumatic cylinder
• Two-stage electric foot pedal
• Front-mounted control for clear operator visibility
• Protected pneumatic filter and regulator assembly
• Lubrication-free air cylinder with no oil mist
• Ergonomic pedestal-style machine construction

TECNA states that the 4668N is a 50 kVA linear-action spot-welding machine with a 6.1 V secondary voltage, 16.5 kA maximum short-circuit current and 5.7 kA thermal current at 100%.

Technical Specifications

Manufacturer: TECNA

Article / model: 4668N

Machine condition: New

Machine type: Pneumatic linear-action spot welder

Welding process: Resistance spot welding

Nominal power at 50% duty cycle: 50 kVA

Maximum welding power: 82 kVA

No-load secondary voltage: 6.1 V

Maximum short-circuit current: 16.5 kA

Thermal current at 100%: 5.7 kA

Standard electrical supply: 400 V, 50 Hz

Recommended delayed fuse rating: 100 A

Suggested mains cable section for up to 30 m: 35 mm²

Electrical insulation class: Class F

Compressed-air pressure: 6.5 bar

Approximate air consumption per 1,000 welds: 1.7–5.4 Nm³

Throat depth: 500 mm

Standard arm gap: 280 mm

Maximum electrode force: 300 daN

Electrode stroke: 5–80 mm

Water-cooling flow: 4 litres/minute

Minimum cooling-water pressure: 2.5 bar

Noise level: Below 70 dB(A)

Net weight: Approximately 225 kg

Arm diameter: 50 mm

Electrode-holder diameter: 25 mm

Electrode-cone diameter: 14.8 mm

Linear-Action Welding Head

Unlike a rocker-arm machine, the TECNA 4668N brings the moving electrode down in a straight, linear path.

This arrangement provides:

• Consistent electrode alignment
• Controlled vertical electrode movement
• Good accessibility for flat components and assemblies
• Stable clamping force during the weld cycle
• Suitability for repeat production and fixture-based work

The machine has a standard arm gap of approximately 280 mm and a throat depth of approximately 500 mm. Its heavy-duty pneumatic cylinder uses a chrome-plated stem and provides an adjustable double stroke.

TECNA TE101 Microprocessor Control

The standard TECNA TE101 resistance-welding control manages the welding sequence electronically and is positioned on the front of the machine so that welding information remains visible during operation.

The brochure lists the following TE101 capabilities:

• Integrated ammeter
• 13 adjustable welding parameters
• Capacity for up to 99 programs
• Two welding programs recallable by foot pedal
• Half-cycle welding-time control
• Minimum secondary-current compensation
• Upper and lower welding-current limits
• Output warning for welds outside programmed limits
• Optional RS232 interface

TE101 functionality and available interfaces should be confirmed against the precise control configuration supplied with the machine.

Two-Stage Electric Foot Pedal

The TECNA 4668N is operated by a two-stage electric foot pedal.

The first stage allows the electrodes to close and clamp the workpiece so that the operator can check its position. The second stage initiates the weld only after the component has been correctly located.

This arrangement can improve:

• Component positioning
• Operator control
• Repeatability
• Production efficiency
• Weld consistency

The machine is also pre-wired for an additional foot pedal that can directly recall welding program number two, which is useful where two different weld settings are required on the same component.

Pneumatic System

The pneumatic cylinder operates without lubrication, helping eliminate oil mist around the welding area.

A protected filter and pressure-regulator assembly includes:

• Electrode descent-speed adjustment
• Electrode return-speed adjustment
• Electrode-force adjustment
• Compressed-air pressure gauge

The standard compressed-air requirement is approximately 6.5 bar.

Water-Cooled Welding Circuit

The TECNA 4668N incorporates water cooling for the parts of the welding circuit subjected to the greatest heat load.

Water-cooled components include:

• Epoxy-resin-coated welding transformer
• Welding arms
• Electrodes
• Electrode holders

The standard cooling requirement is approximately 4 litres per minute, with a minimum water pressure of approximately 2.5 bar.

A suitable closed-loop industrial water chiller may be required where an adequate clean cooling-water supply is not already available.

Heavy-Duty Electrode Equipment

The electrode holders are manufactured from chrome-copper and are designed for demanding production use and long service life.

They can be configured for:

• Straight electrode installation
• Angled electrode installation
• Different component profiles
• Application-specific electrode geometries

Electrode tips and optional arm arrangements can be selected according to the components being welded.

Typical Applications

The TECNA 4668N may be suitable for:

• Sheet-metal fabrication
• Mild-steel spot welding
• Stainless-steel spot welding
• Automotive components
• Commercial-vehicle components
• Metal cabinets and enclosures
• Electrical-panel manufacture
• Wire and sheet assemblies
• Brackets and pressed components
• Heating and ventilation products
• Domestic-appliance components
• Furniture and shelving manufacture
• Light engineering production
• Repetitive batch welding
• Maintenance and repair departments
• General industrial resistance welding

Actual welding capacity depends on the material type, sheet thickness, number of layers, surface condition, electrode geometry, cooling and programmed weld settings.

Why Choose the TECNA 4668N?

The TECNA 4668N is designed for companies that need more power, reach and process control than a small bench-mounted spot welder can provide.

Its key production advantages include:

• Long 500 mm throat depth for access into larger components
• Straight-line electrode movement
• Pneumatic clamping with adjustable force
• Microprocessor-controlled weld cycles
• Water-cooled welding components
• Two-stage pedal operation
• Program storage for repeat jobs
• Heavy-duty stationary construction
• Reduced operator effort compared with manually operated machines

It is particularly suitable for fabrication and manufacturing businesses seeking a new industrial spot welder for consistent workshop or production use.

Standard Equipment

The standard machine specification includes:

• TECNA TE101 microprocessor welding control
• Two-stage electric foot pedal
• Pneumatic linear-action cylinder
• Pressure regulator and air-pressure gauge
• Chrome-copper electrode holders
• Water-cooled transformer
• Water-cooled arms and electrode equipment
• 500 mm throat arms
• Emergency-stop control
• Stationary pedestal cabinet

Final supplied equipment should be confirmed at the time of quotation.

Optional Equipment

Depending on availability and production requirements, options may include:

• Alternative electrodes and electrode tips
• Alternative arm arrangements
• Adjustable large-gap arm assembly
• Additional foot pedal for welding program number two
• TE550 advanced welding control
• USB or RS232 communication options
• Two-hand safety control
• Closed-loop water chiller
• Special tooling or workholding fixtures

Some options are available only with the optional TE550 controller.

Installation Requirements

Before installation, the purchaser should confirm:

• Available three-phase electrical capacity
• Correct supply voltage and frequency
• Required cable and protective-device sizes
• Compressed-air quality and pressure
• Cooling-water flow and temperature
• Floor loading and machine position
• Adequate working clearance
• Electrical isolation
• Applicable guarding and workplace safety requirements

The standard specification is 400 V, 50 Hz, a 100 A delayed fuse, 6.5 bar compressed air and a cooling-water flow of approximately 4 litres per minute. Other voltages or frequencies may be available by special order.

Important Specification Notice

All specifications, dimensions, ratings, capacities and equipment descriptions are approximate and are provided for guidance only.

FAQ

What is the TECNA 4668N?

The TECNA 4668N is a stationary, pneumatic, linear-action resistance spot welder rated at approximately 50 kVA.

Is the TECNA 4668N an inverter spot welder?

The 4668N is listed by TECNA as a single-phase industrial resistance spot welder rather than a medium-frequency inverter model. It uses the TE101 microprocessor control to manage the welding cycle.

What is its throat depth?

The standard throat depth is approximately 500 mm.

What is the gap between the welding arms?

The standard arm gap is approximately 280 mm.

What is the maximum electrode force?

The published maximum electrode force is approximately 300 daN, equivalent to roughly 3,000 N.

Does the machine require water cooling?

Yes. The transformer, arms, electrode holders and electrodes are water cooled. The published requirement is approximately 4 litres per minute at a minimum pressure of 2.5 bar.

What compressed-air supply is required?

The published operating pressure is approximately 6.5 bar.

What control is fitted?

The standard specification includes a TECNA TE101 microprocessor weld control.

Can it store welding programs?

Yes. The TE101 brochure specification lists storage for up to 99 welding programs.

Can the operator clamp the component before welding?

Yes. The two-stage foot pedal allows the workpiece to be clamped and checked before the welding current is activated.

What electrical supply does it require?

The standard brochure configuration is listed as 400 V, 50 Hz, with a delayed fuse rating of approximately 100 A. Final electrical requirements must be confirmed before installation.

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