28/05/2026
The Middle Section!
Welcome back to the "Turbo ABC" - Today its all about the middle section.
The middle section of a turbocharger is called the Center Housing Rotating Assembly (CHRA), or often simply the "core" or "cartridge".
It acts as the heart of the turbocharger, connecting the hot turbine side (exhaust) to the cold compressor side (intake).
Key Components of the CHRA are the shaft, the bearings, the center Housing and the seal.
Basic functions of the middle section are:
Rotational Support: Allows the turbo shaft to spin at speeds often exceeding 200,000 RPM.
Lubrication: Channels pressurized oil from the engine to lubricate the bearings and prevent wear.
Heat Management: Protects the internal components from the high heat of the exhaust side.
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