The 73LA is a professional spot welding head designed for use with Sunkko welding machines. It delivers precise, stable, and high-speed welding for battery packs and thin metal strips.
Welds 0.2 mm pure nickel and 0.3 mm nickel.
Optional 2/4/6/8 pulse settings for different welding needs.
Touch control for quick pulse adjustment.
Industrial design for easy and user-friendly operation.
Quick-install welding pens for extended welding applications.
External foot switch for precise welding position.
Suitable for fast assembly of large battery packs.
Spot welding nickel/copper strips to lithium cells
Used in multi-cell battery packs
Precision battery pack assembly and repair
Suitable for 18650, 21700, LiFePO4 cells
Hobbyist or small-scale industrial pack building
| 8 Pulses time | 8~80ms |
| Telescopic arm distance | 95-160mm(adjustable) |
| Welding thickness | 0.05~0.2mm(pure nickel)/0.05~0.3mm(nickel plated) |
| Welding needle spacing | 2~7mm |
| Total length of spot welding pen | ≈580mm |
| Welding pen cable area | 16mm2 |
| Size of welding pin | ∅1.5mmX7mm |
| Specification | Sunkko 73LA | Sunkko 738AL | Sunkko 73B |
|---|---|---|---|
| 8 Pulses time | 8~80ms | 8~80ms | — |
| Telescopic arm distance | 95-160mm(adjustable) | 95-160mm(adjustable) | — |
| Welding thickness | 0.05~0.2mm(pure nickel)/0.05~0.3mm(nickel plated) | 0.05~0.2mm(pure nickel)/0.05~0.3mm(nickel plated) | — |
| Welding needle spacing | 2~7mm | 2~7mm | — |
| Total length of spot welding pen | ≈580mm | ≈580mm | — |
| Welding pen cable area | 16mm2 | 16mm2 | — |
| Size of welding pin | ∅1.5mmX7mm | ∅1.5mmX7mm | — |
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