19150 - Main Landing Gear Outer Bearing

19150 – Main Landing Gear Outer Bearing

Available now on the Airparts.aero Marketplace.

Overview

The 19150 is an industry-standard, flight-critical bearing cup, representing the outer race of a high-performance tapered roller bearing for aircraft main landing gear wheels. This component is precision-manufactured by leading bearing producers like Timken to the most stringent aerospace standards. It is designed to be press-fit into the aircraft wheel hub, providing a hardened, precision-ground raceway for the rollers of its mating bearing cone (P/N 19283). The 19150 is engineered to support the immense radial and axial (thrust) loads imposed on the landing gear during taxi, takeoff, and landing, ensuring safe and reliable wheel rotation.

Key Features

• Tapered Roller Design: As the outer race for a tapered roller bearing, its angled raceway is specifically engineered to handle a combination of both radial (vertical) and axial (side) loads simultaneously. This is essential for withstanding the complex forces of a landing or a crosswind-corrected taxi.
• Case-Hardened Bearing Steel: Fabricated from high-purity, case-hardened bearing steel. This process creates an extremely hard, wear-resistant surface to handle the high contact stresses of the rollers, while maintaining a softer, more ductile core to resist fracture from the shock loads of landing.
• Precision Ground Raceway: The inner raceway surface is precision ground and honed to a mirror-like finish. This minimizes rolling friction, reduces heat generation, and maximizes the service life of the complete bearing assembly.
• Industry Standard Interchangeability: Manufactured to the universal Timken® 19150 standard, ensuring full interchangeability and compatibility with its specified mating cone (Timken® 19283) and any wheel assembly calling for this part number.
• Certified Quality: Guarantees the part meets the stringent quality control, material purity, and heat treatment standards required for use in certified aircraft wheel assemblies.

Technical Specifications

• Part Number: 19150
• Component Type: Tapered Roller Bearing Cup (Outer Race)
• Industry Standard: Timken® 19150
• Mating Cone (Inner Race & Rollers): Timken® 19283
• Material: Case-Hardened, High-Carbon Bearing Steel
• Dimensions:
  • Outside Diameter (O.D.): 3.0000 inches
  • Width: 0.6250 inches
• Certification: FAA Production Approval (when sourced from an approved manufacturer)

Aircraft Compatibility

The 19150 bearing cup is a standard component in the main wheel assemblies of a vast number of popular general aviation aircraft. It is imperative to consult the specific aircraft's Illustrated Parts Catalog (IPC) or wheel and brake manual for final verification.

• Common Aircraft Manufacturers:
  • Cessna: 182, 206, 210
  • Piper: PA-32, PA-34, PA-46 Series
  • Beechcraft: Bonanza, Baron
  • And numerous other aircraft utilizing compatible Cleveland and McCauley wheel assemblies.

Applications

The 19150 is a critical component for safe and reliable landing gear operation:

• Wheel Rotation: Provides the stationary outer raceway that allows the aircraft wheel to rotate freely around the landing gear axle with minimal friction.
• Load Bearing: Transmits the full static and dynamic loads from the wheel, through the rollers, and into the axle.
• Mandatory Maintenance Item: Bearings are wear items that must be cleaned, inspected for damage (such as spalling, pitting, or heat discoloration), and repacked with approved grease at regular intervals, typically during tire changes or annual inspections. The cup itself must be inspected for damage and replaced if any defects are found.

Why Choose 19150?

The failure of a wheel bearing can lead to wheel seizure, a collapsed landing gear, and a loss of directional control on the ground. The 19150 is the certified component designed and tested to withstand these loads. Using a genuine, traceable part ensures that the bearing is made from properly certified, ultra-clean steel and has been subjected to the correct heat treatment and grinding processes. For a flight-critical component that supports the entire aircraft, there is no substitute for the proven quality and reliability of a certified part.

Order Your 19150 Bearing Cups Now

Ensure the safety and reliability of your aircraft's landing gear with certified, high-performance components. Visit Airparts.aero to order your 19150 bearing cups today.

The 19150 bearing cup is one half of a sophisticated system designed to handle complex loads. A tapered roller bearing's ability to handle both radial and axial (thrust) loads is a direct result of its geometry. The conical rollers and the angled raceways of the cup (19150) and cone (19283) are designed such that the lines of contact between them are angled to the bearing's axis. This angle allows the load to be distributed between a radial and a thrust component. As the aircraft turns or lands with any side-load (e.g., in a crosswind), this geometry prevents the wheel from wobbling or departing the axle, making this design essential for the safety and stability of aircraft landing gear.

Note: This is a flight-critical component. It must be installed as a matched set with its corresponding bearing cone (P/N 19283). Installation requires specialized tools to press the cup into the wheel hub and should be performed by a certified A&P mechanic. The bearing must be properly cleaned and packed with an approved high-temperature aircraft wheel bearing grease before use and torqued to the correct preload as specified in the aircraft maintenance manual.