Click to enlarge

Koyo Drawn Cup Closed End Needle Bearing

Koyo Closed End Drawn Cup Needle Roller Bearing
These bearings are full complement needle roller bearings. Full complement means the needles are touching each other. The original drawn cup needle roller bearing, as invented and introduced by Torrington, employs a full complement of rollers. The complement drawn cup bearing combines maximum capacity and low cost with the advantages of the drawn outer ring. The inward turned lips of the cup are used to mechanically retain the full complement of needle rollers to provide positive radial retention of the rollers even though it may be necessary to remove the shaft repeatedly during the servicing of the mechanism employing the bearing. 
Installation of Closed End Bearings
The installation tool combines all the features of the tool used to install open end bearings.But the pilot is spring loaded and is part of the press bed.
The angled shoulder of the pressing tool should bear against the closed end, with the bearing held on the pilot, to aid in starting the bearing true in the housing.