Bottom Roller Characters:​ 
Manufactured by world the most advanced production line.
The newest processing technique.
The highest quality structure steel.
The most advanced surface treatment technique.
The best accurate processing capacity.
The newest on-line inspect method.

Quality Level：
Rate of non-mechanical wave reaches above 99%, maximum wave not exceed 3mm.
Splicing two pieces of roller, testing run out static ≤0.03mm.
Tolerance of roller teeth width ≤0.03mm.
Roller already pre-installed bearing in plant and also has spliced interact.
No need of pre-straight before roller assembly to frame machine, may directly joint tightly.
Smooth surface without bur and wound.
Operation smoothly during long-term working, have good uniformity.