Bushing assembly for an electrophotographic image forming device

A developer unit for an electrophotographic image forming device, comprising:

• a housing;
• a rotatable developer roll having a shaft that defines a rotational axis of the developer roll;
• and
• a bushing having a cylindrical opening that extends through the bushing from an inner axial end of the bushing to an outer axial end of the bushing, the shaft extends through the cylindrical opening such that the bushing rotatably supports the shaft, the bushing is installed on a recess in the housing and is separable from the housing, the recess is defined by a concave surface of the housing, a groove is formed in an outer surface of the bushing and runs circumferentially relative to the rotational axis of the developer roll, the groove is positioned between the inner axial end of the bushing and the outer axial end of the bushing, the groove matably receives a tooth that projects from the concave surface of the housing, contact between the tooth and a surface of the bushing in the groove defines an axial position of the bushing relative to the housing along the rotational axis of the developer roll.

A developer roll bushing for an electrophotographic image forming device, comprising:

• a body attachable to a housing in the electrophotographic image forming device;
• a cylindrical opening extending through the body from an inner axial end of the body to an outer axial end of the body for receiving and rotatably supporting a shaft of a developer roll, the cylindrical opening is defined by an inner circumferential surface of the body;
• and
• a groove formed in an outer surface of the body that is opposite the inner circumferential surface of the body, the groove runs circumferentially relative to a central axis of the cylindrical opening, the groove is positioned between the inner axial end of the body and the outer axial end of the body, the groove is positioned to matably receive a tooth on the housing to define an axial position of the developer roll bushing relative to the housing along the central axis of the cylindrical opening.