Roller Type Standard: Roller is an important part of belt conveyor, Hebi roller, variety, mine rollers, large quantities. Role is supporting belts, reducing the belt running resistance, and the vertical of the belt does not exceed a certain limit in order to ensure the belt running smoothly. Roller according to their use are classified as self-aligning roller, buffer roller, roller trough, parallel rollers. New development roller: At present, domestic and foreign markets have a variety of new roller, roller factories, such as deep groove angle roller, surface coating roller, front-roller and ceiling-mounted rollers and the like. Each new roller has its own advantages and disadvantages, in the next few years, the use of non-steel materials for making roller manufacturing roller will become a trend.