Timken

At Timken they leverage their industry experience to make the best bearings for this application and help to make every landing a safe one.   The 629 performance code was created in cooperation with the leading wheel and brake manufacturers around the globe.   These wheel producers depend on Timken and our expertise to make each touch down a moment you can trust.

Timken FAA/ PMA Bearing Cups

Timken FAA/PMA Bearing Cones

Timken Non PMA Wheel Bearing Cones

Timken Non PMA Wheel Bearing Cups

FAA-PMA approved Timken wheel bearing cup and cones for Goodyear, Cleveland, and McCauley wheels

  • Class 2 aviation grade FAA-PMA bearings (Timken designates these with a -20629 suffix)
  • Tighter tolerance and higher quality control than Class 4 automotive bearings

 

Applications:

  • Main and nose landing wheel assemblies for private, commercial and military aircraft

Design Attributes:

  • Design meets both customer and FAA quality standards.
  • Performance code 629 bearing enhancements are the standard configuration for current and new applications. These premium bearings achieve superior performance through tightened tolerances and are able to accommodate the repeated loads and sudden accelerations of a jumbo jet during landing.
  • Engineered surfaces are available to further improve wear, fatigue and frictional performance.

IMPORTANT NOTE:  Timken uses the same part number for both the automotive and aviation versions of these bearings, many people mistakenly use the lower quality automotive bearings in their airplane. It is critical that the FAA-PMA Class 2 version be used for aircraft applications for two reasons:

  • They are a higher class of bearing with tighter tolerance and have been subjected to more stringent quality control procedures. Due to the smaller diameter of aircraft wheels, at a given ground speed the bearings rotate at a much higher RPM and require the tighter tolerances to prevent premature failure.
  • It is a violation of FAA regulations to use non-approved automotive bearings on certified aircraft.
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