1. The center adopts the combination of the deep groove ball bearings, ball thrust bearings, it is applicable to the medium speed precise processing of heavy load for CNC lathes.

2. The ball thrust bearing adopts increasing series. It can bear larger axial thrust and applicable to the large load processing.

3. The center is made of alloy tool steel and its hardness after being heat treated could reach HRC58-62. It is thus has high steel performance and high wear resistance.

4. The anti-dust seal on the front can prevent the cutting fluid and dust from entering into the bearings so as to protect the center.

5 Oil can be added through the oil-adding hole at the center external. It is convenient for daily maintenance so as to prolong its service life.