Timken - Aircraft Bearing Cup | 39412-20629 ASHERLPS The M25988/1-271 Aircraft O-Ring is

The M25988/1-271 Aircraft O-Ring is a premium fluorosilicone seal designed for use in critical aerospace applications

and as a base for student kits

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Timken - Aircraft Bearing Cup | 39412-20629 ASHERLPS The M25988/1-271 Aircraft O-Ring isThis is the most basic and most widely used type of tapered roller bearing. It consists of two main separable parts: the cone (inner ring) assembly and the cup (outer ring). It is typically mounted in opposing pairs on a shaft. Specifications Series: 39000 Cup Part Number: 39412 Design Units: Imperial Approvals: FAA PMA Don't be tempted to buy cheapy automotive bearingsBecause Timken uses the same base part number for both the automotive and aviation