13889-20629 - Textron Aviation OEM Tapered Cup Cone Roller Bearing

13889-20629 – Textron Aviation OEM Tapered Roller Bearing

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The Textron Aviation 13889-20629 is an OEM-certified tapered roller bearing assembly (cone and rollers) engineered for high-performance aircraft wheel and gearbox applications. As an evolved version of the legacy 13889 bearing, the -20629 dash number signifies a specific Textron engineering revision. This revision often includes specialized heat-treatment protocols, "Super-finished" raceways to minimize rolling resistance, and a more robust cage design to withstand the high-energy deceleration forces characteristic of turbine-powered aircraft.

Tapered roller bearings are unique in their ability to manage Combined Loads—the simultaneous application of Radial Loads (the vertical weight of the aircraft) and Thrust Loads (the lateral "side-loading" experienced during crosswind landings or high-speed taxiing). The 13889-20629 is a critical component for maintaining the structural integrity of the landing gear, ensuring that the wheel hub remains perfectly aligned even under the most extreme mechanical stress.

Key Features

• Advanced Metallurgy: Manufactured from high-purity, vacuum-degassed steel to prevent "sub-surface fatigue" and extend the time between wheel overhauls (TBO).

• High Load Density: Optimized roller geometry allows for a higher load-carrying capacity within the same physical footprint as legacy bearings.

• Textron-Spec Surface Finish: Features specialized "honing" of the rollers and cone face to reduce operating temperatures and friction-induced wear.

• Controlled-Contour Rollers: Specifically designed to distribute stress evenly across the contact area, preventing "edge loading" that leads to premature spalling.

• Vibration Dampening: The precision fitment of the -20629 revision helps mitigate harmonic vibrations that can cause "shimmy" in nose-wheel assemblies.

Technical Specifications

• Part Number: 13889-20629

• Manufacturer: Textron Aviation (Cessna / Beechcraft)

• Component Type: Tapered Roller Bearing (Cone)

• Bore Diameter (d): 1.5000 in (38.10 mm)

• Cone Width (B): 0.6500 in (16.51 mm)

• Material: Case-Hardened / Carburized Aerospace Steel

• Matching Cup (Outer Race): Typically 13830 or equivalent (Refer to IPC)

• Certification: FAA-PMA / Textron OEM Original Equipment

Aircraft Compatibility

• Cessna Citation Series: 500, 525 (CJ), 550, and 560 models.

• Beechcraft King Air Series: 90, 200, and 300 models.

• Cessna 208/208B Caravan: Standard on high-utilization turboprop configurations.

• Beechcraft Premier I / IA: 390 series aircraft.

• Note: The -20629 is often the preferred replacement for older 13889 bearings. Always consult the Model-Specific Illustrated Parts Catalog (IPC) to verify the correct dash number for your wheel serial number.

Applications

• Main & Nose Wheel Hubs: Supporting the aircraft's mass and facilitating smooth rotation during takeoff and landing.

• Auxiliary Power Unit (APU) Gearboxes: Used in high-speed, high-thrust load internal shaft support.

• Flight Control Actuators: Providing low-friction pivot points for heavy-duty secondary flight controls.

Why Choose the 13889-20629?

In business aviation, landing gear reliability is a dispatch-critical factor. Choosing the genuine Textron 13889-20629 ensures that the bearing's Internal Clearance and Taper Angle are perfectly matched to the aircraft's axle specifications. Aftermarket "look-alike" bearings often utilize lower-grade steel that can "Brinell" (permanently indent) under high-impact landings, leading to a "notchy" feel and eventual hub failure. The -20629 is the gold standard for operators who require maximum durability in high-cycle, high-load environments.

Maintenance & Installation Addendum

The 13889-20629 is a precision-matched component. It should never be mixed with a "worn-in" cup from a different manufacturer.

Tech Tip: During installation, "Bearing Packing" is mandatory. Use only Textron-approved grease (e.g., Mobilgrease 28 or AeroShell 22). When adjusting the axle nut, ensure the final "Rolling Torque" meets the AMM Chapter 32 requirements to prevent overheating or excessive wheel play.

Note: The 13889-20629 is a safety-critical part. During inspection, look for "bluing" (overheating), "pitting," or "spalling" on the rollers. Any tactile roughness when rotating the cone is cause for immediate replacement. Installation must be performed by a certified A&P mechanic.

Documentation

• Textron Aviation Technical Manual Store

• FAA AC 43.13-1B - Chapter 9: Aircraft Systems and Components (Wheels and Tires)

Approved Replacement for Partnumbers:

• 13889
• 214-00200

FAA Eligibility [Click Here]

13889-20629
13800 Series Single Cone; 1 1/2" Straight Bore; 0.4690" Wide; 0.060" Maximum Shaft Fillet Radius; Standard Tolerance

Size Range: 1.375 in. to 10.5625 in. OD (0.500 in. to 9.125 in. cone bore)

Applications:

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

• Aerostar: PA-60-600(Aerostar 600), PA-60-601(Aerostar 601)
• Cessna: 120, 140, 150C, 150D, 150E, 150F, 150G, 150H, 150J, 150K, A150K, 150L, A150L, 152, A152,170, 172, 175, 177A, 177B, 177RG, 180, 182, 182E, 182F, 182N, 182S, 180G, 180H, 185, 185A, 185C, D, E, A185E, A185F, 188, A188, 188A,A188A, 188B, A188B, T188C, 206, U206, 207, 210C, 210K, T210K, 210L, T210L, 210N, P210, P210N, 208 Caravan 1, 208B, 305B, 305E, 310, 320, 336 Skymaster, 337, 337A, 337E, 411, 411A, 414, 421B, 500 , 501, 550, 551
• Commander: 112, 112B, 112TCA, 114, 114B
• Mooney:M20, M20A, M20B, M20C, M20D, M20E, M20F, M20G, M20J, M20K, M20M
• Raytheon: B19, 23, A23, C23, T-34C, 35, V35, 35-C33, 35-B33, 35-C33A, G33, F33A, F33C, V35B, 36, A36, A36TC, B36TC, A60, 76, D95A, 95, 95-B55, E55, 58, 58P, 58TC, 60, A60, B60, 99, 99A, A99A, B99, C99, 100, A100, B100, F90, 200,1900, 1900C
• Piper: PA-18, PA-20, PA-22, PA-22-108, PA-23-235, PA-23-250, PA-24, PA-24-250, PA-24-260, PA-24-400, PA-25, PA-28-140, PA-2-150, PA-28-160, PA-28-151, PA-28-161, PA-28-180, PA-28-181, PA-28-235, PA-28-236, PA-28R-180, PA-28R-200, PA-28-201T, PS-28R-201, PA-28RT-201, PA-28R-201T, PA-30, PA-39, PA-31-300, PA-31-325, PA-31-350, PA-32-260, PA-32-300, PA-32-301, PA-32-301T, PA-32R-300, PA-32RT-300, PA-32RT-300T, PA-34-200, PA-34-200T, PA-34-220T, PA-44-180, PA-44-180T, PA-46-310P, -350P