CNC bearing steel bar peeler specifically is a machining process used to take a raw black bar to a polished bright bar. During the bar peeling process, the black bars are machined to remove surface cracks, cooled layers, oxide and other defects. It is during the peeling process that the requested dimensions and specifications are achieved on the machined parts, such as: accurate dimensions, surface quality factors, and roundness. As a high precision steel bar peeler , it has requirement on bar original straightness : Better ≤3mm/m. If straightness bigger than 3mm/m, rough straightener (pre-straightener ) before peeler is necessary .