A conveyor, comprising: a frame including opposing end plates (112, 114) at an end of the conveyor, each end plate (112, 114) including an upper opening for mounting a drive shaft and a lower opening comprising a receptacle for mounting a position limiter assembly; and a position limiter assembly mounted in the frame, the position limiter assembly comprising a mounting bar extending from a first end to a second end, a plurality of rollers mounted to a plurality of roller mounting arms (172; 372; 472; 572) extending from the mounting bar, and a mounting portion for mounting the mounting bar between the end plates (112, 114); the conveyor being characterized in that each roller mounting arm (172; 372; 472; 572) includes a slotted end for mounting an axle on which an associated roller is mounted; and in that the slotted end includes an operation slot (176; 376; 476; 576) and an open installation slot (177; 377) intersecting the operation slot (176; 376; 476; 576) at an angle; and and in that the roller comprises a pair of spaced-apart rollers (161, 162) rotatably mounted on an axle (163; 563), the axle (163; 563) including roller mounting portions and a narrow central portion having flat sides configured to be received in the slotted end of the associated roller mounting arms (172; 372). a frame including opposing end plates (112, 114) at an end of the conveyor, each end plate (112, 114) including an upper opening for mounting a drive shaft and a lower opening comprising a receptacle for mounting a position limiter assembly; and a position limiter assembly mounted in the frame, the position limiter assembly comprising a mounting bar extending from a first end to a second end, a plurality of rollers mounted to a plurality of roller mounting arms (172; 372; 472; 572) extending from the mounting bar, and a mounting portion for mounting the mounting bar between the end plates (112, 114); the conveyor being characterized in that each roller mounting arm (172; 372; 472; 572) includes a slotted end for mounting an axle on which an associated roller is mounted; and in that the slotted end includes an operation slot (176; 376; 476; 576) and an open installation slot (177; 377) intersecting the operation slot (176; 376; 476; 576) at an angle; and and in that the roller comprises a pair of spaced-apart rollers (161, 162) rotatably mounted on an axle (163; 563), the axle (163; 563) including roller mounting portions and a narrow central portion having flat sides configured to be received in the slotted end of the associated roller mounting arms (172; 372). the conveyor being characterized in that each roller mounting arm (172; 372; 472; 572) includes a slotted end for mounting an axle on which an associated roller is mounted; and in that the slotted end includes an operation slot (176; 376; 476; 576) and an open installation slot (177; 377) intersecting the operation slot (176; 376; 476; 576) at an angle; and and in that the roller comprises a pair of spaced-apart rollers (161, 162) rotatably mounted on an axle (163; 563), the axle (163; 563) including roller mounting portions and a narrow central portion having flat sides configured to be received in the slotted end of the associated roller mounting arms (172; 372).