PSL has a long year experience in production of rings and rotary machinery parts of large sizes.
Modern, high-productive machine tools enable to machine rings with outer diameters ranging up to 4000 mm by methods of vertical turning, drilling and grinding as well as to cut outer or inner gearing of module sizes m=40 for outer gearing, respectively m=25 for inner gearing.
If appropriate the machined rings can be heat or chemical heat treated to achieve required mechanical properties. Selected areas of the rings or gears can be eventually treated by a method of induction hardening.
A wide range of surface treatment methods from spray painting using modern synthetic, epoxy and polyurethane paints up to zinc spray metalizing ensure corrosion protection of the rings in diverse environs. | 
