Bushing GFR

The combination of PTFE and bronze makes GFR bushings a suitable solution where self-lubrication is required without compromising on strength.

The three-layer structure of GFR bushings is designed to combine the advantages of each material without major compromises: the steel backing provides dimensional rigidity, the sintered bronze intermediate layer distributes the load evenly, and the PTFE surface reduces friction to a level close to that of a fully self-lubricating bushing. This combination makes them suitable for applications where low weight and low friction are just as important as mechanical strength.

Composition of GFR bushings (PTFE and bronze) for self-lubrication

GFR bushings have a steel core, an intermediate layer of sintered bronze, and a PTFE surface layer, which ensures direct contact with the shaft. This three-layer structure combines the mechanical strength of steel with the excellent sliding properties of PTFE, without the need for external lubrication.

How GFR bushings work

During operation, the PTFE layer acts as a solid lubricant, reducing the coefficient of friction to values much lower than those of a simple bronze bushing. The mechanical load is borne by the bronze layer and the steel backing, whilst the PTFE is solely responsible for reducing surface friction.

Installation and preventive maintenance procedures for GFR

During assembly, the shaft surface must be clean and free from corrosion, and the bushing must be inserted without force so as not to damage the thin PTFE layer. Regular checking of the radial clearance helps to detect wear before it affects other components in the joint. For similar installation applications, E92F bushings, HRC2 bushings and BK-1 bushings are comparable alternatives, whilst for shaft sealing, the range of oil seals often completes the same repair.

Advantages of buying GFR bushings from Hydraulic Seals Store

Hydraulic Seals Store stocks GFR bushings with full specifications displayed for each product, alongside other hydraulic and pneumatic seals, rings, scrapers, and sleeves from the catalogue. Ordering online is straightforward, and delivery is fast anywhere in Romania.

Each GFR variant in the catalogue displays its full dimensions, along with details regarding the thickness of the PTFE coating, which is relevant to the bushing’s estimated service life in heavy-duty applications. For hydraulic equipment with multiple similar joints, ordering a complete set simplifies both installation and the planning of future repairs.