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Rulon Bearings

Saint-Gobain Rulon® LR Bearing/Seal PTFE
Categories: Polymer; Thermoplastic; Fluoropolymer; Polytetrafluoroethylene (PTFE)

Material Notes: Rulon® is the Saint-Gobain trade name for their family of proprietary PTFE compounds. This family of materials offers the combination of high compressive strength, low coefficient of friction, and excellent abrasion and corrosion resistance while running without lubrication. They are used in bearing and seal applications from temperature extremes of 400°F to over 500°F with and without additional lubricants. A unique property of Rulon® is the absence of stick slip, that is, erratic low-speed motion.

LR Grade Bearing/Seal PTFE: The best known, most widely used Rulon formulation. Rulon LR has a long reputation for high wear resistance, low friction, good electrical properties and chemical inertness. Not only does it make a great sleeve, flange or thrust bearing, but it can also be bonded to nearly any surface to provide wear resistance and reduce friction. Maroon in color.

Suitable for use in environments of steam, wet, dry, vacuum. Mating surface of steel/stainless steel Rc 35 and higher. Material has electrical and thermal insulation properties.
Markets for these products include Agricultural, Appliances, Automotive, Document Processing Equipment, Industrial, Transportation
Information provided by Saint Gobain Performance Products.

Vendors: TriStar Plastics Corp. provides engineering, custom fabrication and manufacturing of high-performance plastics and self-lubricating bearing materials, such as Rulon, PEEK, Torlon, CJ Composites and Ultracomp. Capabilities include component design, material selection, prototype and production, manufacturing and surface modification. Call (800) TRI-STAR (800) 874-7827 or visit or www.TStar.com

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Physical PropertiesMetricEnglishComments
Density 2.25 g/cc0.0813 lb/in³ASTM D792
Water Absorption 0.00 %
@Time 86400 sec
0.00 %
@Time 24.0 hour
Immersion; ASTM D570
Deformation 3.0 %
@Pressure 10.3 MPa
3.0 %
@Pressure 1500 psi
ASTM D621
 
Mechanical PropertiesMetricEnglishComments
Hardness, Shore D 60 - 7060 - 70ASTM D2240
Tensile Strength 18.6 MPa2700 psiASTM D4894
Elongation at Break 235 %235 %ASTM D4894
Flexural Yield Strength 3.80 MPa
@Strain 1 %
551 psi
@Strain 1 %
ASTM D790
Flexural Modulus 0.410 GPa59.5 ksiASTM D790
Compressive Yield Strength 5.20 MPa
@Strain 1 %
754 psi
@Strain 1 %
ASTM D695
Compressive Modulus 0.550 GPa79.8 ksiASTM D695
Limiting Pressure Velocity 0.350 MPa-m/sec9990 psi-ft/min
 
Electrical PropertiesMetricEnglishComments
Volume Resistivity 1.00e+15 ohm-cm1.00e+15 ohm-cmASTM D257
Surface Resistance 2.00e+13 ohm2.00e+13 ohmASTM D257
Dielectric Constant 2.5
@Frequency 1e+6 Hz
2.5
@Frequency 1e+6 Hz
ASTM D150
Dielectric Strength 35.4 kV/mm
@Thickness 2.50 mm
900 kV/in
@Thickness 0.0984 in
ASTM D149
Dissipation Factor 0.0010 - 0.0040
@Frequency 1e+6 Hz
0.0010 - 0.0040
@Frequency 1e+6 Hz
ASTM D149
 
Thermal PropertiesMetricEnglishComments
CTE, linear, Parallel to Flow  99.4 µm/m-°C
@Temperature 37.8 °C
55.2 µin/in-°F
@Temperature 100 °F
Length
 149 µm/m-°C
@Temperature 149 °C
83.0 µin/in-°F
@Temperature 300 °F
Length
CTE, linear, Transverse to Flow  61.9 µm/m-°C
@Temperature 37.8 °C
34.4 µin/in-°F
@Temperature 100 °F
Diameter
 81.5 µm/m-°C
@Temperature 149 °C
45.3 µin/in-°F
@Temperature 300 °F
Diameter
Thermal Conductivity 0.331 W/m-K2.30 BTU-in/hr-ft²-°FASTM D2214
Maximum Service Temperature, Air 288 °C550 °F
Minimum Service Temperature, Air -240 °C-400 °F
 
Descriptive Properties
ColorMaroon

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