1.High-accuracy and high frequency welded pipe is selected as the shell, which enjoys less diameter run-out and better balance;
2.Stamping parts are used as bearing housing, which are machined by NC lathe;
3.The bearings are KA serial special bearing for idlers
4.The material used for bearing shafts is high-strength 45#steel, and NC turning and grinding can ensure precision.
5.The sealing is specially designed with abilities of self-compensation, low resistance, waterproof and dustproof, which can keep bearing in good lubricated condition for a long time.