GGB Filament Wound Bearings
To meet the need for high load, self lubricating bearings that provide low wear rates in a wide variety of applications, GGB (Glacier Garlock Bearings, an Enpro Industries Company www.ggbearings.com) has developed a comprehensive family of filament wound, composite self-lubricating bearings. These bearings combine the excellent lubricating properties of filled PTFE (Polytetrafluoroethylene) with the high strength and stability of an oriented glass fiber wound structure. GGB’s Filament Wound Bearings employ a tough, high strength composite structure consisting of epoxy-impregnated, wound glass fibers oriented to provide the radial and axial strength required to support high bearing loads. GAR-MAX® and HSG® (High Strength GAR-MAX®) have high strength fibers twisted together and encapsulated by a high temperature resin. GAR-FIL® bearings have a proprietary filled PTFE tape liner bonded to the high strength epoxy backing. Laboratory and field testing has proven that GGB Filament Wound Bearings provide outstanding performance in a wide variety of demanding dry or lubricated bearing applications. These include off-road vehicles, agricultural and automotive equipment, construction equipment, aerial lifts, windmills, packaging equipment and many more. Product availability and additional technical information is available on the GGB website at www.ggbearings.com.
| Specification | Test | Value | Units |
| Specific Gravity, 73°F GAR-MAX / GAR-FIL | D792 | 1.87 / 1.96 | Lb/in.3 |
| Tensile Strength @ Yield, 73°F | D638 | psi | |
| Tensile Modulus of Elasticity, 73°F | D638 | psi | |
| Tensile Elongation (at break), 73°F | D638 | % | |
| Flexural Strength, 73°F | D790 | psi | |
| Flexural Modulus of Elasticity | D790 | psi | |
| Shear Strength, 73°F | D732 | psi | |
| Compressive Strength – Ultimate GAR-MAX / GAR-FIL | 60,000 / 55,000 | psi | |
| Compressive Strength at 2% Deformation | D695 | psi | |
| Compressive Strength at 10% Deformation | D695 | psi | |
| Deformation Under Load | % | ||
| Compressive Modulus of Elasticity, 73°F | D695 | ||
| Compressive Strength ⊥ to Laminate (Modulus) | psi | ||
| Compressive Strength ⊥ to Laminate (Yield) | psi | ||
| Compressive Strength ⊥ to Laminate (Ultimate) | psi | ||
| Hardness, Durometer (Shore “D” scale) | D2240 | ||
| Hardness, Rockwell (Scale as noted) | D785 | Rockwell M | |
| Izod Impact, Notched @ 73°F | D256 Type A | ft.lbs/in. of notch | |
| Coefficient of Friction (Dry vs Steel) Static | PTM55007 | .2 | |
| Coefficient of Friction (Dry vs Steel) Dynamic | PTM55007 | .15 | |
| Maximum Static Bearing Load (P) | PTM55007 | 20,000 | psi |
| Maximum Unlubricated No Load Velocity (V) GAR-MAX/GAR-FIL | PTM55007 | 25 / 500 | ft/minute |
| Maximum Limiting PV (Unlubricated) GAR-MAX / GAR-FIL | PTM55007 | 30,000 / 35,000 | psi x ft/min. |
| Wear Factor “K” x 10-10 | PTM55010 | Cubic in.-min/ft.lbs.hr | |
| Sand Wheel Wear/Abrasion Test | UHMW=100 | ||
| Minimum Mating Surface Hardness | Rockwell (Brinnell) | ||
| Coefficient of Linear Thermal Expansion | E-831(TMA) | in/in/°F x 10-5 | |
| Coefficient of Thermal Expansion Hoop | E-831(TMA) | 7.0 | in/in/°F x 10-5 |
| Coefficient of Thermal Expansion Axial | E-831(TMA) | 15.0 | in/in/°F x 10-5 |
| Softening Point | °F | ||
| Heat Deflection Temperature 264 psi | D648 | °F | |
| Embrittlement Temperature | °F Min. | ||
| Continuous Service Temperature in Air GAR-MAX / GAR-FIL | 325 / 400 | °F Max. | |
| Short Term Service Temperature | °F Max. | ||
| Tg-Glass Transition (Amorphous) | D3418 | °F | |
| Melting Point (Crystalline Peak) | D3418 | °F | |
| Thermal Conductivity | F433 | BTU-in/(hr/ft2°F) | |
| Dielectric Strength Short Term | D149 | Volts/mil | |
| Volume Resistivity | D257 | ohm/cm | |
| Surface Resistivity | D257 | ohm/cm | |
| Dielectric Constant, 106 Hz | D150 | ||
| Dissipation Factor, 106 Hz | D150 | ||
| Flammability @ 3.1mm(1/8 in.) UL94 | UL94 | ||
| Arc Resistance | seconds | ||
| Water Absorption, Immersion 24 Hours | D570 (2) | Nil | % |
| Water Absorption, Immersion Saturation | D570 (2) | Nil | % |
| Machinability Rating | N/A | 1=easy, 10=difficult | |
| Imperial (U.S.) Size Availability (Off the Shelf) | .5 ID to 6 ID | inches | |
| Metric Size Availability (Off the Shelf) | 12 to 150 | mm |
| Characteristics / Attributes | High Load / Dimensionally Stable / Standard Sizes / Low Cost |
