SKF OK couplings use the SKF oil injection method to join two shaft together. The principle is to press two conical sleeves together on top of the shaft ends, while an oil film eliminates metallic contacts between the two surfaces. The SKF mounting kits offer a complete solution to mount or dismount SKF OK couplings and every set has been designed with a particular series of OK couplings in mind. They can be combined with other accessories from the SKF hydraulic tool program (e.g. pressure gauges, adaptor blocks, high pressure pipes, etc.)