SKF
Rod Seals - Machined Seals
SKF machined rod seals offer the same customisation benefits for the cylinder head: any diameter, any profile, machined from high-performance polyurethane or PTFE stock. These seals are engineered to provide precise rod sealing with low friction and long service life, even when produced in one-off quantities. Common applications include replacement rod seals for vintage or imported machinery, large marine deck cylinder rods, and ingot handling cylinders in steel mills. The machined rod seal can replicate an existing design from a sample or drawing, or can be optimised by SKF engineers for improved performance using modern lip geometries. This service enables cost-effective cylinder repair and performance upgrades without the lead time and capital cost of new tooling.
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Trusted by Industry Leaders
Custom Inner and Outer Diameters
Fits non‑standard rods and gland bores.
Profile Choice
Standard compact, U‑cup, and PTFE step‑seals all machinable.
Material Matching to Fluid
Polyurethane for mineral oil, PTFE for aggressive fluids.
Low‑Friction Lip Design
Optimised for hydraulic servo applications.
Pairing with Buffer Seal
Machined buffer and rod seal sets for high‑pressure protection.
Urgent Replacement
Keeps legacy machines running when OEM parts are obsolete.
Eliminating Chronic Leakage on a Marine Deck Cylinder
A fish‑processing vessel had chronic rod seal leaks on a deck crane cylinder due to saltwater contamination. SKF machined a special H‑PUR polyurethane rod seal with an aggressive wiper lip integrated, stopping the leak and protecting the primary lip from salt crystals.
Machined Rod Seals for Short Stroke, High Frequency Applications
In a vibration test rig, the rod seal needed to follow a shaft oscillating at 50 Hz with minimal friction. SKF machined a PTFE rod seal with a thin, flexible lip that maintained contact at these high speeds without overheating, a seal that no moulded catalogue part could provide.