McFarlane Aviation Products ORDER ONLINE NOW!
Or Call 1-866-920-2741
M-TH 7:30am-5:30pm CT
F 7:30am-5:00pm CT
Quick Search      Search Tips

    
Your Shopping Cart
You Have 0 Items in Your Cart
Subtotal  $0.00
View Cart Check Out Help
Login Package Tracking Purchase Options
Part Number: 18337
Description: BEARING CUP CL 2 CODE 629 FAA-
FAA-PMA
PMA Supplement TIM2
Qty per Aircraft:
Unit of Measure: EACH
Retail Price: $152.21
Inventory Status:
Your Discount Price: $103.91
Qty EACH

Please verify eligibility for your aircraft

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.


 

Airforms, Inc. | Alcor Instruments and Probes | APS BlackSteel Brake Discs & Linings | Baffle Seal Material | Bearings | Brake and Wheel Components | Brownline Seat/Cargo Tracks | Bushings | Cable, Bulk | Cables and Chains, Flight Control | Cables, Door and Step | Carb Heat Parts | Controls, Push Pull | Curtis Superior Valves | Door and Step Parts | Drain Valves, Fuel and Oil | Electrical Components | Exhaust System | F. Atlee Dodge Products | Flap System Components | Fuel System Components | Gaskets and Seals | Hardware, Standard | Hinges | Knots 2U Products | Landing Gear Components | Metal Bar Stock | Miscellaneous | Oil Coolers | Plastic and Fiberglass Trim and Fairings | PMA Products, Inc. | PROP GUARD Anti-Abrasion Boot | Pulleys | Rudder Pedals | SAF-AIR Fuel and Oil Drain Valves | SAFE-HEET Engine Heaters | Seat Rails and Seat Components | Skins, Control Surface | Steering Rods, Boots, & Doublers | Stene Aviation Products | Texas Aeroplastics Products | Tools | Universal Joints, Control Yoke

 
McFarlane Aviation
©1997-2017 McFarlane Aviation, Inc. All rights reserved.
Terms and Conditions of Sale | Terms and Conditions of Use | Privacy Statement | Request a Catalog | Master Product List

McFarlane Aviation