(57) A starter (1) has a built-in shock absorbing unit (9) in which gaps (A, A-1) are
formed in an axial direction between an outer periphery of a ring drive (45) and an
outer periphery of a ring spacer (47), and gaps (B, B-1) are formed in a diameter
direction between the outer periphery of the ring spacer (47) and an outer periphery
of a ring drive (46). Even if grease flows out toward the gaps (A, A-1) in the axial
direction from a dumber space by centrifugal force of rotation of an output shaft
(6) of the starter (1), it is possible to prevent the grease from being scattered
or flying out to the outside of the unit (9) through the gap (A, A-1) because the
outside in the diameter direction of the gaps (A, A-1) is covered with an outer peripheral
wall (47a) of the ring spacer (47).
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