220V Lathe Tool Post Grinder Internal and External Sharpener Grinding Machine
Internal grinding spindle：1 0.63 0.24in. Grinding depth： 0.12 -3.54 in. Speed(inner)： 12000RPM. Speed(outer)：4500RPM. Hope for your understanding. ▲ 6 months' warranty for the machines, not for the consumables.