Supplier advises this Product Change for Centrifugal Fans 175x69mm 9TGA Type with production in October or November 2018: 

Design change of the rotor to improve the commonality of parts with other models 

[Description of change ]
- Changing the adhesion between impeller and rotor cover from adhesion, to press fitting by a fitting ring.
- Changing the adhesion between rotor cap and rotor cover thermal caulking by the rotor cap, to spin caulking by a rotor bush. 
- The design between existing impeller and modified impeller are same without fixing part of impeller and rotor cover. 

If you have any questions please contact your Mouser Technical Sales 
Representative. 

5-1118-02