Linear bearings are used in conjunction with hardened linear drive shaft. For infinite linear motion system. Ball and hardened shaft load because it is a point of contact, allowing the load is small, but the straight line, the minimum friction, high precision, fast movement. Plastic linear bearings with shaft no special requirements; can withstand greater loads than metal bearings, but due to the movement between the bearing and the shaft is sliding friction, so the velocity of plastic linear bearings subject to certain restrictions; resistance to motion than metal straight Bearings should be large; but its movement than the metal linear bearing low noise, especially at high speed in the case of plastic with speed linear bearing noise impact is very small. Plastic linear bearings due to the design of its interior with a flute, so allowing larger dust occasions, during the movement of dust from the chip slot automatically bring out the friction surface bearing body; plastic linear bearings also allows the use of the process cleaning, internal sliding film made of special materials can even be used for long-term operation of the liquid. Ring die pellet mill Changzhou, Changzhou particle machine accessories www.rtjxjg.com