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TECNA 3120 Scissor-Type Weld Gun — 32 kVA Air-Operated Single-Phase AC, Built-In Control

TECNA 3120 Scissor-Type Weld Gun — 32 kVA Air-Operated Single-Phase AC, Built-In Control

TECNA 3120 scissor-type (X-type) suspended weld gun — 32 kVA, air-operated, single-phase AC with built-in weld control. Maximum welding current of 20,000 amps and up to 1,011 lbs of electrode force at the standard arm.

Description

The TECNA 3120 is a 32 kVA single-phase AC scissor-type (X-type) suspended weld gun with air-operated actuation, built for production spot welding. It delivers a maximum welding current of 20,000 amps, with electrode force from 1,011 lbs (450 daN) on the shortest arm down to 292 lbs (130 daN) at full 31.50 in. (800 mm) reach (8 bar). The 3120 is the built-in-control version, with an integrated TE470/TE480 microprocessor control in the handle; its separate-control twin is the 3121.

Features

  • 32 kVA single-phase AC transformer with water-cooled, epoxy-resin-coated windings (ISO 5826).
  • Integrated TE470/TE480 microprocessor weld control: 63 weld programs, constant-current mode, pre-weld/slope/pulse/post-weld functions.
  • Gyro suspension on sealed bearings with rotation lock for accurate maneuverability with a TECNA balancer.
  • Long 7.48–31.50 in. (190–800 mm) arm range; adjustable working stroke plus temporary extra (retraction) stroke for hard-to-reach welds.
  • Fully water-cooled copper secondary; lube-free chromium-plated cylinder and shaft; cooling-circuit valves for easy electrode changes.
  • Supplied with earth-leakage switch (30 mA); ground-fault unit available on request.
  • Recommended balancer: TECNA 9412.

Installation Requirements

  • US stock supply: 440 V / 60 Hz (400 V / 50 Hz on request).
  • Delayed fuses 63 A; cable section 0.02 in² (16 mm²) at L=30 m.
  • Compressed air: 116 psi (8 bar); consumption 2.5/7 Nm³ per 1000 spots (short/long stroke).
  • Water cooling: 95 gal/h (360 l/h).
  • Net weight 117 lbs (53 kg) with cables, hoses, and suspension, without arms.

Additional information

Weight 117 lbs
Gun Type

Scissor-Type (X-Type)
Arm Configuration

L
Control Type

Built-In
Standard Control Unit

TE470/TE480
Nominal Power 50% (kVA)

32
Max Welding Power (kVA)

90
Max Welding Current (A)

20000
Thermal Current 100% (A)

4000
No-Load Secondary Voltage (V)

5.6
Supply

440 V / 60 Hz
Mains Cable (L=30m, 400 V)

0.02 in² (16 mm²)
Delayed Fuses (400 V)

63 A
Arms Centerline

8.07 in (205 mm)
Insulated Arms Connection Ø

1.65 in (42 mm)
Non-Insulated Arms Conn. Ø

1.73 in (44 mm)
Gyro Suspension Ø

9.61 in (244 mm)
Arm Length Range

7.48–31.50 in (190–800 mm)
Max Electrode Force

1011 lbs (450 daN)
Max Elec Force 8 bar (Min Arm)

1011 lbs (450 daN)
Max Elec Force 8 bar (Max Arm)

292 lbs (130 daN)
Working Stroke

0.31–0.98 in (8–25 mm) min arm; 0.98–3.15 in (25–80 mm) max arm
Max Stroke

7.87–9.84 in (200–250 mm)
Compressed Air

116 psi (8 bar)
Air Consump /1000 (Short)

2.5 Nm³
Air Consump /1000 (Long)

7 Nm³
Air Supply Hose Ø

0.39 in (10 mm)
Water Cooling Flow

95 gal/h (360 l/h)
Max Weldable Ø

0.55 in (14 mm)
Max Steel Thickness (Min Arm)

0.12 + 0.12 in (3 + 3 mm)
Power Supply

Actuator Type

Product Type

Supply Notes

440 V / 60 Hz (US stock; 400 V / 50 Hz on request)

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