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Journal bearing turbo shaft play with/without oil pressure


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Thought I'd do a little experiment while I had the pressure primer out, since I'm one of those people who always wonders how much radial shaft play is too much for an unpressurized journal bearing turbo. Here's a BNR 16G, with zero axial play but enough radial play for the compressor blades to touch the housing. Hope someone finds it interesting!

 

No oil:

https://drive.google.com/file/d/1RbFBfnX9T4Nq7h6gX7_Hn_ynkCGRZLgr/view?usp=drivesdk

 

50 psi:

https://drive.google.com/file/d/1RcAxA0xF41-hW-gx99SQ7xluKwl_6bg9/view?usp=drivesdk

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