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The Meggitt 13621 Bearing Cup is a precision-machined outer race for tapered roller bearings, designed to work with the 13685 bearing cone to support smooth, low-friction aircraft wheel rotation under heavy radial and axial loads. As a critical landing gear component, it ensures proper load distribution, alignment, and durability, helping maintain safe braking performance and extend wheel bearing service life.
| General Information | |
|---|---|
| Part # | 13621 |
| Manufacturer | Meggitt |
| Shipping Information | |
|---|---|
| Schedule B | 8482993010 |
| ECCN | 9A991.d |
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AIRCRAFT COMPATIBILITY
| Compatible Aircraft* |
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QUESTIONS & ANSWERS
The Meggitt 13621 bearing cup serves as the outer race of a tapered roller bearing assembly in an aircraft wheel. It provides a hardened raceway for the rollers in the bearing cone to rotate against. This interaction allows the wheel to spin smoothly while supporting heavy loads during taxi, takeoff, and landing. Proper function is essential for safe and efficient landing gear performance.
The 13621 bearing cup is paired with the 13685 bearing cone to form a complete tapered roller bearing set. The cone contains the rollers and inner race, while the cup provides the outer raceway. Together, they distribute loads evenly and reduce friction during wheel rotation. Using matched components ensures proper fit, performance, and longevity.
The bearing cup plays a key role in maintaining smooth wheel operation and preventing excessive wear. If the cup becomes damaged, worn, or pitted, it can cause vibration, overheating, or bearing failure. Regular inspection and replacement help maintain landing gear reliability and safety. This is especially important given the high loads experienced during landing and braking.
The 13621 bearing cup is designed to handle both radial loads (aircraft weight) and axial loads (forces during braking and cornering). Its tapered design allows it to manage these combined forces efficiently. This capability is critical in aviation, where landing gear components must perform under extreme stress. Proper load handling helps prevent premature bearing failure.
A bearing cup should be replaced if it shows signs of wear, such as scoring, pitting, corrosion, or discoloration from overheating. These issues can compromise the bearing’s performance and lead to failure if not addressed. During routine maintenance, technicians inspect both the cup and cone together. Replacing worn components ensures continued safe operation and prevents costly damage.
Yes, the 13621 bearing cup is a widely used tapered roller bearing component found in various aircraft wheel assemblies. It is commonly used in conjunction with compatible cones and seals across different aircraft platforms. However, compatibility should always be verified with OEM specifications. Proper part matching ensures safe installation and optimal performance.
Lubrication is essential for reducing friction between the bearing cup and cone rollers. Proper grease application helps prevent metal-to-metal contact, reduces heat buildup, and extends component life. Inadequate lubrication can lead to premature wear or bearing failure. Routine cleaning and re-greasing are critical steps in aircraft wheel maintenance.
If a bearing cup fails, it can lead to increased friction, overheating, and potential wheel seizure. This can compromise braking performance and create serious safety risks during landing or taxi operations. In extreme cases, it may result in damage to the wheel assembly or landing gear. Regular inspection and timely replacement help prevent these issues.
