Self-Lubricating Composite Thrust Bearings Offer Maintenance-Free Operation

April 26, 2010


GGB-MEGALIFE XT thrust bearing is a filament wound thrust washer

GGB Bearing Technology, formerly Glacier Garlock Bearings, has developed GGB-MEGALIFE™ XT, a line of thrust bearings with a self-lubricating sliding layer on both sides of a composite core. The sliding layer consists of a proprietary, seamless tape liner of PTFE blended with high-strength fillers and bonded to a core of continuously woven fiberglass encapsulated in a high-temperature epoxy resin.

Significant Advantages, Simple Installation

The dual sliding layers offer a number of advantages over single-sided, metal-backed thrust bearings, which require extra care during installation to ensure rotation occurs only against the self-lubricating side of the bearing. Improper installation of other single-sided, metal-backed thrust bearings can result in metal-to-metal contact, excessive noise, heat and premature wear.

GGB-MEGALIFE® XT dual-sided bearings are not subject to the same restraints since they can “float” in the assembly without the need for mounting with pins, tabs or notches to prevent rotation. Unlike metal-backed bearings, composite bearings also resist permanent deformation from impact loading, typically recovering their original shape.

Outstanding Dimensional Stability with Low Friction Operation

Even though the bearings are designed for dry operation, they offer exceptional performance in the presence of water, oil and process fluids and can even be used with grease. In fact, in low speed, high pressure type applications, GGB-MEGALIFE™ XT bearings offer one of the lowest coefficients of friction of any self-lubricated bearing material.

Typical applications include agricultural and construction equipment, aerial work platforms, suspension and steering linkage systems, hydraulic and air cylinders and material handling equipment. GGB-MEGALIFE™ XT bearings are also used in:

  • Lift-gate cable systems on delivery trucks
  • Hospital beds
  • Pulley and gear spacers
  • Fork lift masts
  • King pins
  • Lift gates
  • Cranes
  • Backhoes
  • Valve actuator linkages

GGB-MEGALIFE™ XT bearings are designed for applications requiring high load capacity, moderate surface speed capability, good friction and wear properties and a greater resistance to shock, misalignment, contamination and corrosion. These bearings are non-conductive to preclude galvanic reactions. They provide ultimate compressive strength of 205 MPa, and can withstand maximum static and dynamic loads of 140 MPa. Maximum sliding speed is 0.50 m/s, and maximum PV factor is 1.23 MPa x m/s, with operating temperature ranging from -195°C to +175°C.

GGB-MEGALIFE™ XT bearings are available in both standard and custom sizes. Nominal sizes range from 12 mm to 75 mm with standard thicknesses of 1.5 mm, 2.0 mm and 3.0 mm.

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