CENTERLESS GRINDING MACHINE SUITABLE FOR THE GRINDING OF SPOOLS FOR HYDRAULIC VALVES. Typical components to be centerless ground: O.D. from 12 to 32 mm and lengths from 150 to 250 mm. Machine tooling: loader type GP36 wit......CENTERLESS GRINDING MACHINE SUITABLE FOR THE GRINDING OF SPOOLS FOR HYDRAULIC VALVES. Typical components to be centerless ground: O.D. from 12 to 32 mm and lengths from 150 to 250 mm. Machine tooling: loader type GP36 with adjustable hopper, feeding belt, pneumatic feed-in unit of the components between the wheels, conveyor belt for the off-loading of the ground components.