New TECNA 4640N 16 kVA Pedal-Operated Rocker Arm Spot Welder

New TECNA 4640N 16 kVA mechanically foot-operated rocker-arm spot welder for sale in Ireland. TE101 control, adjustable 230–550 mm reach and water cooling.

Heavy-Duty Mechanically Foot-Operated Resistance Spot Welder with Adjustable-Reach Arms and TE101 Control

The TECNA 4640N is a pedestal-mounted mechanically foot-operated rocker-arm spot welder designed for accurate and repeatable resistance spot welding in sheet-metal fabrication, general engineering and production environments.

The machine combines a 16 kVA nominal rating, adjustable-length welding arms, a maximum throat depth of approximately 550 mm, water-cooled welding components and TECNA’s TE101 microprocessor weld control.

Its extended-reach rocker-arm arrangement is particularly useful when welding larger panels, cabinets, enclosures and fabricated assemblies where greater access behind the electrode tips is required.

TECNA article number: 4640N

TECNA's article 4640N is a 16 kVA foot-operated rocker-arm resistance spot welder. The mechanically operated pedal closes the electrodes, while a microswitch starts the welding cycle when the selected clamping position is reached.

Main Features

• New TECNA industrial resistance spot welder
• 16 kVA nominal power at 50% duty cycle
• Mechanically foot-operated rocker-arm electrode movement
• Adjustable arm depth from approximately <span style="color:red">230 to 550 mm</span>
• TECNA TE101 microprocessor welding control
• Water-cooled transformer, arms and electrodes
• Adjustable electrode stroke
• Adjustable electrode force
• Heavy-duty chrome-copper electrode holders
• Electrode holders suitable for straight or angled installation
• Adjustable-length mechanical foot pedal
• Microswitch-controlled weld initiation at the preset electrode force
• Front-mounted control for clear operator visibility
• Ergonomic stationary pedestal construction
• No compressed-air supply required for electrode operation
• Compact 36 mm welding-arm arrangement

TECNA lists the 4640N with 16 kVA nominal power, 35 kVA maximum welding power, 3.4 V no-load secondary voltage and 12.5 kA maximum short-circuit

Technical Specification

Manufacturer: TECNA

Article / model: 4640N

Machine condition: New

Machine type: Foot-operated rocker-arm spot welder

Welding process: AC resistance spot welding

Nominal power at 50% duty cycle: 16 kVA

Maximum welding power: 35 kVA

No-load secondary voltage: 3.4 V

Maximum short-circuit current: 12.5 kA

Maximum welding current on steel: 10.0 kA

Thermal current at 100%: 3.3 kA

Standard electrical supply: 400 V, 50 Hz

Delayed fuse at 380–415 V: 32 A

Delayed fuse at 220–240 V: 50 A

Suggested cable section up to 10 m: 6 mm²

Suggested cable section up to 30 m: 10 mm²

Electrical insulation: Class F

Compressed-air pressure: N/A

Air consumption per 1,000 welds: N/A

Minimum throat depth: 230 mm

Maximum throat depth: 550 mm

Maximum electrode force at minimum reach: Approx. 240 daN

Maximum electrode force at maximum reach: Approx. 95 daN

Electrode stroke at minimum reach: 8–44 mm

Electrode stroke at maximum reach: 15–85 mm

Short-circuit current at maximum reach: Approx.8.4 kA

Cooling-water flow: Approx. 2.5 litres/minute

Minimum cooling-water pressure: 2.5 bar

Published noise level: Below 70 dB(A)

Net weight: 135 kg

Welding-arm diameter: 36 mm

Electrode-holder diameter: 19 mm

Electrode-cone diameter: 12.7 mm

Approximate overall height: 1,414 mm

Approximate cabinet depth including pedal: 1,009 mm

Approximate overall width: 408 mm

The detailed technical figures are taken from the manufacturer’s May 2024 specification table and dimensional drawing for article 4640N.

Mechanical Foot-Pedal Operation

The TECNA 4640N uses a mechanical foot pedal and rocker-arm linkage to close the welding electrodes and apply the required clamping force.

Unlike a pneumatic model, this version does not require an air cylinder, pneumatic regulator or compressed-air supply for electrode movement.

The foot-operated system provides:

• Simple mechanical operation
• No compressed-air installation requirement
• Direct operator control of electrode closure
• Adjustable electrode force
• Adjustable electrode stroke
• Low maintenance requirements
• Straightforward workshop installation
• Good control when positioning individual components
• Suitability for intermittent and general production welding

The mechanical pedal is adjustable in length. A microswitch initiates the welding cycle once the preset electrode force or clamping position has been reached.

Adjustable-Reach Welding Arms

The welding arms can be adjusted to suit different component depths.

The published working range for article 4640N is approximately:

• Minimum throat depth: 230 mm
• Maximum throat depth: 550 mm

This long-reach arrangement makes the machine useful for welding further into:

• Sheet-metal panels
• Cabinets
• Doors and access panels
• Electrical enclosures
• Ducting components
• Fabricated boxes
• Metal furniture
• Larger formed assemblies

As the arm reach increases, available welding current and electrode force reduce. At maximum reach, TECNA publishes an approximate short-circuit current of 8.4 kA and electrode force of Approx. 95 daN.

TECNA TE101 Microprocessor Control

The standard TECNA TE101 is a microprocessor-based controller for single-phase AC resistance welders.

It manages the machine’s welding sequence and controls the electronic devices responsible for regulating welding current. The control is mounted toward the front of the machine so that settings and welding information remain visible to the operator during production.

Published TE101 capabilities include:

• Integrated welding-current measurement
• 13 programmable welding parameters
• Storage for up to 99 welding programs
• Up to 31 programs recallable externally
• Welding-current control using programmed limits
• Upper and lower current limits
• Half-cycle welding-time control
• Minimum secondary-current compensation
• Single-weld and automatic operating modes
• Weld-quality monitoring
• Out-of-limit weld indication

The TE101 is suitable for both manually and pneumatically operated TECNA resistance welders.

Adjustable Mechanical Foot Pedal

The TECNA 4642N is operated using a mechanical treadle-style foot pedal connected to the rocker-arm system.

During operation:

1. The operator positions the components between the electrodes.
2. The pedal is pressed to close the electrodes.
3. Increasing pedal movement applies the required electrode force.
4. A microswitch starts the weld cycle when the preset clamping position is reached.
5. Releasing the pedal opens the electrodes.

The pedal length can be adjusted to improve operator comfort and accommodate different working positions.

This mechanical arrangement eliminates the requirement for a pneumatic cylinder, compressed-air controls and a separate pneumatic service connection.

Adjustable Electrode Force

The electrode force is set through the mechanical pedal and rocker-arm arrangement.

The approximate published maximum force is:

• 240 daN at the minimum 230 mm throat depth
• 95 daN at the maximum 550 mm throat depth

The correct force depends on:

• Material type
• Combined sheet thickness
• Electrode-tip diameter
• Surface coating
• Welding current
• Weld time
• Arm reach

Actual production settings should be established through weld testing and inspection.Water-Cooled Welding Circuit

Water-Cooled Welding Circuit

The TECNA 4640N uses water cooling to control heat in the welding circuit during repeated operation.

Water-cooled components include:

• Epoxy-resin-encapsulated transformer
• Welding arms
• Electrode equipment

Cooling-water requirement of approximately:

• Flow: 2.5 litres per minute
• Minimum pressure: 2.5 bar

A suitable industrial water chiller or clean closed-loop cooling circuit may be required where an adequate cooling-water supply is unavailable.

Heavy-Duty Electrode Equipment

The electrode holders are manufactured from chrome-copper for heavy-duty use and extended service life.

They are designed to accept:

• Straight electrodes
• Offset electrodes
• Angled electrodes
• Bent electrodes
• Flat electrodes
• Swivel or special-purpose tips

Alternative arm and electrode configurations may be selected according to the shape and accessibility of the component being welded.

Welding Capacity

The manufacturer’s performance table lists an approximate maximum capacity for article 4647N of:

• 3 + 3 mm pickled mild-steel sheet
• 10 + 10 mm round bar

These figures are manufacturer performance references rather than guaranteed capacity for every application. Actual capability depends on throat depth, electrode shape, cooling, surface condition, electrical supply and weld schedule.

Typical Applications

The TECNA 4640N may be suitable for:

• General sheet-metal fabrication
• Mild-steel resistance spot welding
• Stainless-steel sheet assemblies
• Electrical cabinets and enclosures
• Metal doors and panels
• HVAC and ventilation products
• Commercial kitchen equipment
• Metal furniture and shelving
• Automotive and commercial-vehicle components
• Brackets and pressed parts
• Appliance components
• Agricultural equipment panels
• Maintenance and repair departments
• Fabricated boxes and housings
• Long-reach panel welding
• Applications where compressed air is unavailable or unnecessary
• Intermittent workshop and small-batch production
• Applications requiring a more compact arm and electrode arrangement

Actual suitability must be established by testing the intended materials, coatings, thicknesses and component geometry.

Why Choose the TECNA 4640N?

The TECNA 4640N is a practical choice for businesses requiring an industrial spot welder with long-reach arms and programmable welding control, but without the installation requirements of a pneumatic machine.

Its principal production benefits include:

• Adjustable reach up to approximately 550 mm
• Simple mechanically operated electrode closure
• Adjustable electrode force
• Programmable TE101 weld control
• Water-cooled welding circuit
• Long-reach access into panels and enclosures
• No compressed-air connection required
• Adjustable mechanical foot pedal
• Heavy-duty stationary construction
• Multiple weld-program storage
• Flexible electrode and arm options

It is particularly suitable for fabrication businesses producing cabinets, panels, enclosures and sheet-metal assemblies where straightforward foot operation and a long working reach are preferred.

Standard Equipment

The standard configuration is understood to include:

• TECNA TE101 microprocessor control
• Mechanical rocker-arm operating system
• Adjustable-length mechanical foot pedal
• Microswitch weld-cycle initiation
• Adjustable-length welding arms
• Chrome-copper electrode holders
• Water-cooled transformer and welding circuit
• Adjustable electrode force
• Adjustable electrode stroke
• Emergency isolator
• Stationary pedestal cabinet

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

Optional Equipment

Available options may include:

• Alternative straight, offset, angled or swivel electrodes
• Special electrode holders
• Reduced-section arms
• Special arm lengths and configurations
• Closed-loop water chiller
• Application-specific fixtures or tooling

Installation Requirements

Before installation, the purchaser should confirm:

• Available electrical supply and capacity
• Supply voltage and frequency
• Protective fuse or circuit-breaker rating
• Cable size and cable length
• Cooling-water flow, pressure and temperature
• Machine position and working clearance
• Floor condition and anchoring requirements
• Electrical isolation
• Guarding and workplace safety requirements

A compressed-air supply is not required for the standard foot-operated machine.

The standard configuration is a 400 V, 50 Hz supply, but different voltages and frequencies may be available by request.

Important Specification Notice

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

FAQ

What is the TECNA 4640N?

The TECNA 4640N is a stationary 16 kVA mechanically foot-operated rocker-arm resistance spot welder with adjustable-length arms and TE101 microprocessor control.

Is the TECNA 4640N foot operated or pneumatic?

It is mechanically foot operated.

The operator presses a treadle-style pedal to close the electrodes and apply clamping force. A microswitch starts the welding cycle when the preset position is reached. No compressed-air supply is required.

Is this an inverter spot welder?

No. The TECNA 4640N is a single-phase AC resistance spot welder with electronic microprocessor weld control. It is not a medium-frequency inverter machine.

What is its maximum throat depth?

The maximum published throat depth is approximately 550 mm.

Can the arm depth be adjusted?

Yes. The arms can be adjusted from approximately 230 to 550 mm.

What is the maximum electrode force?

The brochure lists approximately 240 daN at minimum reach and 95 daN at maximum reach.

What steel thickness can it weld?

The manufacturer lists an approximate maximum capacity of 3 + 3 mm pickled mild steel. Actual capacity depends on arm reach, electrode configuration, material, cooling and weld settings.

What control is fitted?

The standard machine is equipped with a TECNA TE101 microprocessor resistance-welding control.

How many welding programs can the TE101 store?

The TE101 can store up to 99 welding programs, with up to 31 programs externally recallable.

Does it need compressed air?

No. The 4642N uses mechanical foot-pedal operation and does not require compressed air for electrode movement.

Does it require water cooling?

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

What electrical supply does it require?

The standard brochure version is listed as 400 V, 50 Hz. At 380–415 V, the published delayed-fuse rating is approximately 32 A.

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