10% polyimide PTFE rod for dry bearing

The 10% polyimide PTFE rod is machined from high-quality compression-molded billets to achieve the density and dimensional stability required for dry bearing inserts. This material is available in standard diameters from 6 mm to 200 mm and can be supplied in 300 mm, 500 mm, or 1000 mm lengths, with custom cutting available for specific bearing programs. Machining is best performed with sharp carbide or diamond-tipped tools at moderate speeds to generate clean edges and accurate tolerances. For dry running conditions, the rod exhibits excellent wear resistance against hardened steel and stainless steel counterfaces, especially when the mating surface finish is maintained between 0.2 and 0.4 µm Ra. The 10% polyimide PTFE rod is suitable for continuous service at temperatures from -200°C to +260°C and can handle short-term excursions up to 300°C without permanent deformation. It also performs well in chemical environments, resisting most acids, alkalis, and organic solvents, which makes it a practical choice for valve seats, pump wear rings, and bearing pads in aggressive media. The dry running PV limit for this grade is approximately 0.12 MPa·m/s for continuous operation and up to 0.25 MPa·m/s for intermittent sliding, which covers the demands of most industrial bearing applications. The low wear rate against steel counterfaces helps reduce downtime in conveyor systems, pump shafts, and linear guides. To maximize bearing life, designers should maintain a minimum wall thickness of 2 mm for machined bushings and provide adequate clearance to account for the material’s thermal expansion. These practical design considerations ensure that the 10% polyimide PTFE rod delivers consistent performance over thousands of operating hours. The following list provides key dimensional details, and the table below summarizes the main physical and mechanical properties of this dry bearing material.

• Diameter range: 6 mm to 200 mm
• Length options: 300 mm, 500 mm, 1000 mm, or custom cut
• Tolerance: h9 or better on machined surfaces
• Color: Dark brown to black
• Surface finish: Ground or turned, ready for bearing machining

Property	Test Method	Typical Value
Density	ASTM D792	1.95–2.05 g/cm³
Tensile strength	ASTM D4894	18–22 MPa
Elongation at break	ASTM D4894	180–220%
Hardness	ASTM D2240	62–66 Shore D
Coefficient of friction (dry)	ASTM D1894	0.06–0.10
Operating temperature range	—	-200°C to +260°C
Compressive strength (1% offset)	ASTM D695	10–12 MPa
Water absorption	ASTM D570	< 0.05%