TECNA 3321 scissor-type suspended spot welding gun — 16 kVA, built-in TE300 timer. Adjustable arms 7.48–25.59 in.; max electrode force 642 lbs (286 daN) at 6 bar.
The TECNA 3321 is a suspended, air-operated scissor production spot welding gun with a built-in TE300 control unit. It pairs a 16 kVA (50% duty) single-phase AC transformer with an adjustable arm length of 7.48–25.59 in. (190–650 mm) and delivers a maximum electrode force of 642 lbs (286 daN) at 6 bar at the shortest arms. Electrodes, electrode holders, arms, transformer, and thyristor are fully water-cooled. The gun is suspended on a balancer for low-fatigue handling across its working envelope.
Standard TECNA configuration, built to specified voltage/frequency. US pre-configured builds available as 3321NX (standard cables) and 3321NX/LC (49 ft cables).
| Weight | 101 lbs |
|---|---|
| Gun Type | Scissor-Type (X-Type) |
| Standard Control Unit | TE300 |
| Nominal Power 50% (kVA) | 16 |
| Max Welding Power (kVA) | 37 |
| Max Welding Current (A) | 16000 |
| Thermal Current 100% (A) | 4000 |
| Secondary Voltage (V) | 2.8 |
| Supply | Built to order — specify voltage & frequency |
| Delayed Fuses (440 V) | 32 A |
| Mains Cable (≤30m, 440 V) | 0.02 in² (10 mm²) |
| Main Cable Length | 21.3 ft (6.5 m) |
| Arm Spacing | 6.5 in. (165 mm) |
| Arm Length Range | 7.48–25.59 in. (190–650 mm) |
| Max Electrode Force | 642 lbs (286 daN) |
| Max Electrode Force @ 6 bar (shortest arms) | 642 lbs (286 daN) |
| Force/Stroke 190mm Arms | 642 lbs (286 daN) force; 0.24–0.98 in. (6–25 mm) working stroke; 1.18–1.89 in. (30–48 mm) max stroke |
| Force/Stroke 250mm Arms | 510 lbs (227 daN) force; 0.28–1.18 in. (7–30 mm) working stroke; 1.50–2.36 in. (38–60 mm) max stroke |
| Force/Stroke 350mm Arms | 377 lbs (168 daN) force; 0.39–1.61 in. (10–41 mm) working stroke; 1.97–3.15 in. (50–80 mm) max stroke |
| Force/Stroke 508mm Arms | 269 lbs (120 daN) force; 0.51–2.20 in. (13–56 mm) working stroke; 2.76–4.41 in. (70–112 mm) max stroke |
| Force/Stroke 650mm Arms | 269 lbs (120 daN) force; 0.71–2.83 in. (18–72 mm) working stroke; 3.54–5.51 in. (90–140 mm) max stroke |
| Compressed Air Supply | 94 psi (6.5 bar) |
| Air per 1000 Spots | 141 SCF (4 Nm³) |
| Water Cooling | 1.85 gpm (7 lpm) |
| Req Spring Balancer (short) | 9367BR (99–121 lbs) |
| Req Spring Balancer (long) | 9368BR (121–143 lbs) |
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