... focusing heads are used for laser power up to 5 KW and raw beam diameters up to max. 30mm, the FH60 focusing head for laser power up to 15 KW and raw beam diameters up to max. 50mm. All optical units have connections for direct water cooling, are available with different coatings and are generally available from stock. In addition to the cross-jet for the efficient reduction of splashes and smell on the mirror optics, protective gas feeds with a lateral or coaxial flow direction are also offered for targeted coverage of the welding torch.