An arrangement for mounting an ingestion assembly within a singulating apparatus operative to singulate and convey sheet material along a feed path. The mounting arrangement includes a radial bearing pivotally mounting the ingestion assembly to a stationary support structure of the singulating apparatus. The radial bearing is operative to pivot the singulating assembly from an operating position to an idle position about a pivot axis which is substantially orthogonal to the feed path of the sheet material. The mounting arrangement also includes an over-center mechanism disposed in combination with the radial bearing for biasing the ingestion assembly about the pivot axis such that the ingestion assembly is forcibly held in each of the operating and idle positions. Optimum space utilization and ease of use is provided by the radial bearing which cantilever mounts the ingestion assembly to the singulating apparatus.