... noise.4. Motion systemball-screw: ABBA (TAIWAN), 32mm Large pitch ball-screw ,less abrasion and more silent.linear-guide: HIWIN ... and noiseless).TEENKING use automatic centralized lubrication, infiltrate into every motion bearings and joints, ensure the machine for long durability, and ... waterproof and dust proof for machine, ball-screw and linear guides are sealed up strictly, and water fender for ...