Internal Grinding Machines GER CNC Internal Grinding Machine CI-CNC Available in the Series Max. Hole Diameter: 150→300 mm Hole Depth: 150→250 mm Workpiece Diameter: 240→450, Length: 200→700 mm Automatic CNC Angle-Controlled Multiple-Wheel Option Explore Jainnher Internal Grinding Machine JHI-150-CNC Hole Diameter: 6-150 mm Hole Depth: 150 mm Workpiece Diameter: 500, Length: 200 mm Explore Jainnher Internal Grinding Machine JHI-150-NC Hole Diameter: 6-150 mm Hole Depth: 150 mm Workpiece Diameter: 500, Length: 200 mm Explore Jainnher Internal Grinding Machine JHI-3006-NC/CNC Hole Diameter: 20-300 mm Hole Depth: 300 mm Workpiece Diameter: 480, Length: 600 mm Explore Jainnher Internal Grinding Machine JHI-3012-NC/CNC Hole Diameter: 20-300 mm Hole Depth: 300 mm Workpiece Diameter: 480, Length: 1200 mm Explore