SKF

Piston Seals - Machined Seals

SKF machined piston seals provide custom double-acting or single-acting sealing for large, non-standard, or urgent hydraulic cylinder piston applications. Using SEAL JET technology, these seals are machined from tube stock in advanced polyurethane or PTFE compounds to any required diameter and profile. Whether a compact seal with energising O-ring or a solid polyurethane U-cup, machined piston seals meet the same pressure and wear resistance as moulded seals. They are used in large-bore press cylinders, hydropower gate actuators, marine steering rams, and steel mill roll balance cylinders — wherever standard seals are unavailable or too costly for the cylinder size. SKF’s application engineers can advise on the optimal lip geometry and material for the specific fluid, pressure, and stroke length.