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Rulon Bearings

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Saint-Gobain Rulon® 957 Bearing/Seal PTFE
Categories: Polymer; Thermoplastic; Fluoropolymer; Polytetrafluoroethylene (PTFE)

Material Notes: Description: 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. PTFE = polytetrafluoroethylene

957 Grade Bearing/Seal PTFE: Low friction/wear against coated metal or porcelain surfaces. Appropriate mating surfaces are steel, Rc 25 or higher, or painted metal/porcelain. Suitable for use in environments of steam, wet, dry, or vacuum type. Green in color. Material has electrical and thermal insulation properties.
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 PropertiesOriginal ValueComments
Density 2.25 g/ccASTM D792
Water Absorption 0.00 %
@Time 86400 sec
Immersion
Water Absorption at Saturation 0.00 %
 
Mechanical PropertiesOriginal ValueComments
Tensile Strength 15.2 MPaASTM D638
Elongation at Break 200 %ASTM D638
Compressive Yield Strength 1000 psiMax load under tribological use
Coefficient of Friction, Dynamic 0.15 - 0.25Dry vs. Steel
Coefficient of Friction, Static 0.15 - 0.25Dry vs. Steel
Limiting Pressure Velocity 10000 psi-ft/min
 
Thermal PropertiesOriginal ValueComments
CTE, linear, Parallel to Flow 62.0 µin/in-°F
@Temperature 25.6 - 93.3 °C
Length
CTE, linear, Transverse to Flow 35.0 µin/in-°F
@Temperature 25.6 - 93.3 °C
Diameter
Maximum Service Temperature, Air 288 °C
Minimum Service Temperature, Air -240 °C
 
Descriptive Properties
ColorGreen

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PSTGQZ172 / 68686

Rulon Bearings

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