H-Liner^® Polymer Bushings

HEF Polymer bushings are the result of intensive research and development in the field of self-lubricated and zero-maintenance bearings. These polymer bushings are of woven structure, and made of PTFE and epoxy resin providing tensile strength that is vastly superior to injection molded polymer bushings — and vastly more resistant to high loads, seizure and galling.

They are well-suited to rotation and oscillation applications, and high-speeds. High-load polymer bushings from HEF are chemically inert, and have low water absorption. Their maximum working temperature range is up to 320°F (160°C).

H-Liner M are manufactured with an homogeneous woven polymer material, on the complete wall thickness. This product is completely re-machinable and also available as flanged bushings, washers and slides. They are also widely used for when low water absorption or mis-alignement resistance are required.

H-Liner S are manufactured from a high strength composite fiberglass backing completed with an woven liner inside.

H-Liner S1 are made from high strength composite fiberglass backing and completed with an improved wear resistance liner.

		Dyn. Load (N/mm2)	Max Speed (m/s)	Max Temp (°C)	Low-Maintenance	Wear resistance	Low water absorption
H-Liner M		80	0.5	+130°C	+++	++	+++
H-Liner S		100	0.5	+160°C	+++	++	+
H-Liner S1		140	0.5	+160°C	+++	+++	+

For optimal performance we recommend to use grinded pin with a roughness lower than Ra 0.4 µm and hardness higher than 400 HB. HEF DURFERRIT PEL^® OX pin are particularly appropriate to work against H-Liner Bushings.