PTFE Composite GEH ES Series Extra Thick Spherical Plain Bearings

PTFE Composite is the sliding surface itself: it carries the load and it is the part that wears — maintenance-free and designed to run dry: the liner transfers a thin PTFE film onto the shaft, and added grease is not needed and will carry abrasives into the sliding layer. On a geh es series extra thick spherical plain bearings that matters because the sliding layer is chemically inert; the backing decides the rest — steel-backed needs protection, bronze-backed does not. The property data, the comparison against the alternatives and the size table are below.

Why PTFE Composite for GEH ES Series Extra Thick Spherical Plain Bearings

Maintenance-free and designed to run dry: the liner transfers a thin PTFE film onto the shaft, and added grease is not needed and will carry abrasives into the sliding layer. In a geh es series extra thick spherical plain bearings it is the sliding surface itself: it carries the load and it is the part that wears.

A thin PTFE-based liner on a metal backing gives a very low coefficient of friction with no lubricant at all, in a wall thickness that fits where nothing else does. It is the standard maintenance-free bushing for a linkage, a hinge or a pivot that must not be greased.

Material Properties

Service Limits

The liner is thin, so total wear before the backing shows through is measured in tenths of a millimetre — the bearing has a wear life, not a fatigue life, and it is diagnosed by measuring play. It also runs better dry than lubricated: grease is unnecessary, and it holds dust against the sliding surface.

Alternatives and When to Switch

Bronze — solid or sintered — is the alternative where the load is very high, the movement is slow and a lubricant is acceptable. A needle roller bearing is the alternative where friction must be lower still and the section allows it.

Sizes of GEH ES Series Extra Thick Spherical Plain Bearings Available in PTFE Composite