Supercharger Needle Bearings size INA F390978 FC65477 Chevy Mercedes Jaguar

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Eaton Supercharger Needle Bearings
Works on most aftermarket superchargers
Roush, TRD, Allen, Radix etc
This listing is for 2 new Needle Bearings used in the following Eaton Superchargers:

Bearings fit more superchargers and more vehicles then what we listed in our vehicle specific section. If you would like to know if this bearing will fit your supercharger feel free to contact us.

  • Note ( use extra caution on blind bearing holes )
  • This double sealed needle bearing is 2mm or .079" longer or wider than some Eaton type bearings it replaces.
  • The Eaton supercharger case hole is 23.2mm deep in the G3 M45,62,90 & 112 hole through housing. 
  • This leaves about 1.5mm or .050" clearance.
  • I suggest caution for blind bearing bores such as the G3 M62 & 90 used commonly on 2000 & earlier GM cars.
  • The cup bearing must not protrude must be sub-flush in bearing hole.
  • Original Eaton Cup Type needle bearing dimension 17mm ID 23.8mm OD 20mm W or long.
  • This double-seal Supercharger Cup Type needle bearing 17mm ID 23.8mm OD 22mm W or long.
  • The bearing is about .5mm or .020" in the bearing hole. 
  • This INA brand needle bearing is actually a more expensive bearing than both the F390978 and FC65477 (usually found in Jaguars) because this eBay item is an upgrade with the change from a single-seal to a double-seal.
  • This bearing is an upgraded replacement.
  • I prefer this type because it is what I use in my supercharger rebuild services when the customer wants an upgraded needle bearing installed. 
  • It is a better choice if alternative fuels like Methanol injection are being used because the purpose of the double seal design is to keep liquids out of needle bearings.
  • These needle bearings must be installed sub-flush to the interior face of the housing. Improper installation can lead to contact by the rotor(s) on the needle bearing face and ultimately cause damage to and failure of the supercharger. This can be avoided by installing the needle bearing correctly, sub-flush to the face of the rotor cavity on the inside of the housing.

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