Track rollers are commonly divided into support rollers (yoke-type track rollers) and cam followers (stud-type track rollers). Support rollers are ready-to-fit cylindrical or needle roller bearings that can be mounted on all types of tracks. Cam followers are similar to support rollers, but their inner race is composed of a heavy-section threaded solid stud and a type-dependent mounting aid. Both support rollers and cam followers come in several designs and are typically used in conveyor and linear guidance systems, where minimal deflection is required.