Conical Twin Screw and Barrel Conical Twin Screw and Barrel Size: 35/75, 45/90, 45/100, 50/105, 51/105, 55/110, 60/125, 80/143, 80/156, 92/188, 95/188 TECHNICAL DATA Depth of nitration case: 0.4-0.7mm Hardness of nitration: HV900-1060(HRc56~65) Roughness of the surface: Ra 0.4μ M Screw straightness: 0.015mm/m Chrome plating thickness: 0.01-0.1mm Bimetal coating thickness: 1.5-2.0mm Material: Base ...