The Linear Motion Roller Rail Systems allows moving even the heaviest loads with a minimum of effort all with the design-based rigidity and resulting precision. Prasad NC Machine Systems [P] Ltd. Manufactures Linear Motion Roller Rail Systems. Prasad NC Machine Systems [P] Ltd. Is an ISO 9001:2000 certified company that supplies CNC machines like CNC VTL machine, VTL machine, etc. The Roller Rail Systems are Engineered for precise linear operation at high speed. They use precision-machined steel balls as rolling elements promoting exceptionally low resistance with smooth, stable operation at low cost.