Device for assembling tapered roller bearing

A tapered roller bearing assembling device with which a tapered roller is inserted into a pocket of a cage from an inner side of the cage with a larger-diameter side of the tapered roller leading, comprising:

• an inside jig;
• a guide passage defined through the inside jig;
• a cage base which has a placement portion for placing the cage thereon and a clamp portion for fixing the cage onto the placement portion, said cage base being externally fitted to the inside jig, at least one of the inside jig and the cage base being rotatable relative to the other of said inside jig and said cage base;
• wherein the guide passage is open toward an inside of the cage placed on the placement portion of the cage base and guides the tapered roller toward the pocket of the cage from the inside of the cage with the larger-diameter side of the tapered roller leading;
• and
• a presser unit for pressing the tapered roller toward the pocket.