or different thickness metal, the nozzle size is differnt.
nozzle bore diamter: 1.2mm---main for below thickness 6mm,  1.6mm---main for thickness 4-20mm,  1.8mm---main for above thickness 10mm.

YK100 — A professional machine use mechanized plasma torch

Features:
1,   Higher cutting speed and productivity: When cut 10mm low carbon steel, the cutting speed is 3 times higher than the gas cutting;

2,   Higher cutting quality: Unique orifice throat ratio and optimized gas circuit confirms the higher cut verticality and less dross;

3,   Lower cutting cost: Better copper materials and hf wire inlay welding processing, highly improves the consumption life;

4,   With ingenious design and rigorous testing, it proves that this torch fit complex operating environment.

The piercing thickness up-to 20mm
Cutting capacity                             Cutting thickness                                   Cutting speed

Production                                          16mm                                              1100-1200mm/min

Production                                          10mm                                              1600-1700mm/min

Severance (Edge start)                     40mm                                                   130mm/min

Pierce                                                   20mm

Note: The maximum current of this plasma torch model is 120A, the recommended working air pressure is 0.45-0.6MPa, the compressed air should be dry