POLYLUBE Design Guide
48Pages

103 Industrial Park DrIVE / P.O. Box 176 / Walkerton, IN 46574 USA / 800.918.9261 / Ph: 574.586.3145 / Fx: 574.586.7336 / polygoncompOSITES.com COMPOSITE BEARINGS & BUSHINGS POLYLUBEٮ > COMPOSITE MEDICALTUBING POLYMED > COMPOSITE CYLINDERTUBING POLYSLIDEή POLYSTRUCTURE > COMPOSITE SHAPES& FORMS POLYGON TUBE > ELECTRICAL GRADECOMPOSITE TUBING size="-3">

POLYLUBE Design guide SELF-LUBRICATED COMPOSITE BEARINGS HIGHLIGHTS INTRODUCTION3-9 > Polygons company history and product manufacturing divisions. PRODUCT INFORMATION10-29 POLYLUBE FIBER SERIES BEARINGS 10-12 > The ideal candidate for highly loaded bearing joints requiring low friction and low wear over 1.5 million cycles. POLYLUBE MRP AND MRP-SL BEARINGS13-14 > A superb bearing material for agriculture, construction and material handling applications requiring goodload capacity, low frictional values, and superior wear characteristics. POLYLUBE GLASS TAPE BEARINGS15-19 > An excellent...

SELF-LUBRICATED COMPOSITE BEARINGS Founded in 1949 by a chemist work-ing on advanced composite materialsduring World War II at the U.S. Wright-Patterson Air Force base, Polygon Com-pany has grown into an engineered materials company with multiple manufacturing facilities and global distribu- tion and sales offices around the world. Polygons original patents on composite self-lubricating bearings in the mid 1960Ғs stand as a hallmark in the devel- opment of journal bearing technology. Since that time, Polygons ongoing research and develop- ment activities have resulted in multiple patents on...

SELF-LUBRICATED COMPOSITE BEARINGS Polygons line of PolyLubeҙ bearingsuses a fiberglass filament wound structure which incorporates a propri- etary epoxy resin matrix that results in a very high strength bearing that is naturally concentric with no seam or overlap. This high strength laminate construction allows for the use of a thin wall (1/16" to 1/8") bearing which reduces the size and weight of the assembly. The resulting compos- ite material exhibits a very low coeffi- cient of friction coupled with high load-bearing capacity. This high strength laminate construction allows for the use...

SELF-LUBRICATED COMPOSITE BEARINGS In addition to the potential of failure if bearings are not properly lubricated, the total cost of owner-ship for a bearing that must be lubricated is greater than the total cost of a self-lubricating com- posite bearing. Most OEMs clients have found that the cost of purchasing, assembling, and maintaining a greased bearing joint is at a minimum 1.5 times to a maximum of 4 times the cost of a self-lubricating bearing joint. Equipment rental yards are becoming increasingly sensitive to the liability associated with greased bearings.At the most simple level,...

SELF-LUBRICATED COMPOSITE BEARINGS ?Sizing predictability. Due to the fact that these bearings are manufactured via injection molding, sizing can be difficult to predict.?Impact Fatigue. Even glass filled thermoplastic resins can only go so far with resistance to repeated impact.?Limited Self-Lubrication Capabilities. Lubrication for filled thermoplastics does not utilize as significant a percentage nor as effective a type of PTFE as do PolyLube bearing materials. As a result, the in-use coefficient of friction and break-in characteristics of each bearing material is different. Metal backed...

SELF-LUBRICATED COMPOSITE BEARINGS PTFE WITH WEARRESISTANT MATERIALWEAVE HIGH STRENGTHCOMPOSITE FIBERGLASSEPOXY BACKINGWEAR RESISTANT DEBRISLAYS IN VOIDS EXPOSED PTFEREDUCES FRICTION

BREAK-INMATERIALTOP OFRESINFLAKESTOP OFWEAVE PTFE WEAVEFIBERGLASS BACKING PTFE WEAVE FIBERGLASS BACKING > Before Film Transfer Process After Film Transfer ProcessPTFE Film

SELF-LUBRICATED COMPOSITE BEARINGS ★ 4140 Nitrided Shafts STATIC COFDYNAMIC COF 0.300.35 > COEFFICIENT OF FRICTION 0.000.050.100.150.200.25 MRP 13 RaMRP 13 RaMRP 65 RaMRP-SL 65 RaMRP-SL 13 Ra MRP-SL 13 Ra >

SELF-LUBRICATED COMPOSITE BEARINGS The PolyLube Glass Tape bearing is a moderate RPM bearing designed for applications with highersurface velocities or when mixed film conditions are desired.Similar to the Fiber Series bearing, the Glass Tape bearing is manufactured by a filament windingprocess that results in a continuous fiberglass filament backing composition-ensuring excellent mechanical properties (especially fatigue resistance) are attained. The filament wound fiberglass structure uses a high strength, corrosion resistant epoxy resin as the matrix material. The high strength backing...

SELF-LUBRICATED COMPOSITE BEARINGS AVG. COEFFICIENT OF FRICTION 0.000.050.100.150.200.25 Metal BackedBearing Legacy EraFW Bearing PolyLube Fiber Bearing PolyLube Bronze Tape Bearing PolyLube GlassTape Bearing > P=200 psi (constant) > AVERAGE PV LIMIT 0.0020,00040,00060,00080,000 Metal BackedBearing Legacy EraFW Bearing PolyLube Fiber Bearing PolyLube Bronze Tape Bearing PolyLube GlassTape Bearing >

SELF-LUBRICATED COMPOSITE BEARINGS This bearings operating temperature range is ұ325F. Maximum continuous operational surfacetemperature for the standard formulation is 325аF, depending upon load characteristics. The bear- ing has been heat stabilized at these temperatures, so that little dimensional change will occur in the bearing during operation. In a free state, the coefficient of expansion of the PolyLube Glass Tape bearing is approximately 7 x 10-6 in/in/F, similar to the coefficient of expansion for steel, and actually less than some metals. > Ultimate Compression Strength...

SELF-LUBRICATED COMPOSITE BEARINGS The surface finish of the shaft relates directly tothe coefficient of friction at the interface between the shaft and the bearing. Polygon recommends a shaft with a surface finish between 16 and 32 Ra. In applications where stick-slip is especially sen- sitive, a shaft with a surface finish approaching 16 Ra should be used. This will be extremely im- portant when the Fiber liner is used with pres- sures less than 6,000 psi. The reduced surface finish relates to the depth the peaks on the sur- face of the shaft embed into the bearing liner. A rougher...