M618A Manual Surface Grinding Machine - Manual Grinding ...
2021-3-19u2002·u20024. The spindle adopts super precision ball bearing P4, after strict selection after the pre pressure measurement, assembled in the greenhouse, and with the labyrinth design completely waterproof, In order to ensure the service life of the bearing and the grinding surface roughness. 5. No vibration, low noise motor spindle. 6.
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