BEARING CUP, CL 2 CODE 629, FAA-PMA

P/N: LM501310-20629

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Approval FAA PMA
Condition New
Manufacturer The Timken Company
Unit of Measure Each
Retail Price $53.84
Your Price $43.06 Free Shipping on Orders over $500
Stock Status In Stock

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Eligible Aircraft

Make Series Model Start S/N End S/N Eligibility Chart
Cessna 404 404 404-0001 404-0859 6693
Cessna 441 441 441-0001 441-0362 6693
Piaggio Aero Industries P-180 P-180 1001 ZZZZZZZZZZZZZZZ 6693
Piper PA-31 PA-31P 31P-1 31P-7730012 6693
Piper PA-31 PA-31T 31T-7400002 31T-8120104 6693

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Product Details

Wheel Bearing Cups and Cones 

FAA-PMA approved Timken wheel bearings 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
  • Save $$

Don't be tempted to buy cheapy automotive bearings

Because 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.

    Example: At a 70 mph touchdown speed (equivalent to highway speed of a car), a typical 17 inch diameter airplane tire is rotating at 1384 RPM, whereas a typical 27 inch car tire is only rotating at 871 RPM. So even though the aircraft bearing is only subject to intermittent use, some of the performance demands are much higher than a typical automotive application. 
  • It is a violation of FAA regulations to use non-approved automotive bearings on certified aircraft.

Wheel to Seal Kit and Bearing Cross Reference

Bearing Cup and Cone Dimensions

APS BlackSteel brake discs and linings, brake bleed valves, and wheel grease seals also available.

WARNING: Cancer and/or Reproductive Harm - www.P65warnings.ca.gov

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