PTFE Composite PHS Series Maintenance-Free Rod Ends

PTFE Composite PHS Series Maintenance-Free Rod Ends are dimensioned to Manufacturer series to DIN ISO 12240-4 envelope exactly as the standard version is: the material changes the properties, never the envelope. What it does change — the sliding layer is chemically inert; the backing decides the rest — steel-backed needs protection, bronze-backed does not, as the backing: steel-backed is magnetic, bronze-backed is not and the service range about -40 °C to +250 °C for the liner — is set out below with the full size chart.

Why PTFE Composite for PHS Series Maintenance-Free Rod Ends

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 phs series maintenance-free rod ends 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

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.

What the Material Changes About the Bearing

A sliding bearing is not rated in the ISO 281 sense at all. There is no Cr and no L10 life to calculate: the material is specified against a permissible contact pressure and a pv limit, and its life is a wear life. The dimensions still follow the standard envelope, so the part is interchangeable — the calculation behind it is not.

Sizes of PHS Series Maintenance-Free Rod Ends Available in PTFE Composite