Precision international offers high frequency internal grinding spindles, in the new generation series gns from gamfior, italy. These spindles have the rotor produced with very special, high-efficiency electrical laminations, so as to provide more power within a compact body, and using hybrid bearings of abec9 quality. All components are hardened and ground; and all rotating parts are dynamically balanced, to less than g 0.4 residual unbalance. The radial runout and the axial runout at the quill-mounting seat of the shaft is within 2 m and 1 m respectively. These spindles are available both, grease-packed [with reduced maximum speed] or with air-oil lubrication. Spindles with od 170 mm can also be used for external grinding. These spindles are ideal for use in bore grinding or track-grinding of bearing rings; for the grinding of auto-components; fuel injection parts, gears, and others.
