PRESSURE FITTING DEVICE

PROBLEM TO BE SOLVED: To enable simultaneous pressure fitting-in of a pressure fitting part, C-shaped locating snap ring and oil seal by pressurizing a work downward, and disposing a head for setting and pressure fitting the oil seal in from the upper direction of the outside of a work fitting hole so that it faces a downward pressure fitting-in head. SOLUTION: A C-shaped locating snap ring 41 and bearing 42 are set on a downward pressure fitting-in head 27 and a differential gear case W is set in a placing base 6, while an oil seal 40 is set to an upward pressure fitting-in head 28. With the head 28 descending a bearing 42 is pressure fitted into a fitting hole W3 inside the differential gear case W and the bearing 42 is fitted in a groove W of the C-shaped locating snap 41. Simultaneously, the oil seal temporally retained to an up/down head 29 of an upward pressure fitting-in head 28 lowering and pressing the differential gear case W is pressure fitted in a shaft insertion hole W5 on the outside of the hole W3 in which the bearing 42 is fitted.