Rotating device, image forming apparatus

A rotating device comprising:

• a metal-made cylindrical body formed in a cylindrical shape, with a pair of cuts formed in an end portion of the cylindrical body at positions that are opposite to each other along a diameter direction;
• a synthetic-resin-made bush rotatably supported and including a support portion and a pair of engaging portions, the support portion and the pair of engaging portions being integrally formed with each other;
• and
• a pressing rotor configured to apply a rotational force to the cylindrical body while applying a pressure to the cylindrical body in a predetermined pressing direction perpendicular to a rotation center line of the bush, wherein
• the support portion is inserted in the end portion of the cylindrical body with allowance, and rotatably supports the cylindrical body,
• the pair of engaging portions are respectively inserted in the pair of cuts with allowance, and receive a rotational force from the cylindrical body by being engaged with edge portions of the pair of cuts, and
• in a state where a center of the cylindrical body matches the rotation center line of the bush, and a first diameter direction connecting respective centers in a circumferential direction of the pair of cuts matches a second diameter direction connecting respective centers in the circumferential direction of the pair of engaging portions, each interval in the circumferential direction between the pair of engaging portions and the edge portions of the pair of cuts is equal to or larger than an interval in a direction perpendicular to the rotation center line of the bush between an outer circumferential surface of the support portion and an inner circumferential surface of the end portion of the cylindrical body.