Requires the use of a hydraulic press. Eaton black OEM couplers are made from MolyGard heat stabilized, internally lubricated, 30% glass-reinforced nylon (not a cheap coupler). Good You Tube Video's How to Rebuild.
Eaton Supercharger Coupler Rebuild Repair Bearing Snout Kit
Eaton M112 Supercharger Snout Rebuild Repair Bearing Kit
Eaton M90 Supercharger Snout Rebuild Repair Bearing Kit SKF
Eaton M90 Supercharger Snout Rebuild Repair Bearing Kit
Eaton M45 Supercharger Snout Rebuild Repair Bearing Kit Mini Cooper SKF