Lined polyurethane idler running in 25000h-35000h, flexible rotation, small resistance, no damage to the belt, easy installation, no maintenance, users in the use of the process can save a lot of manpower, material resources, electricity, and thus bring considerable economic benefits to users. The friction up-regulating center roller has a strong ability to prevent belt damage and deviation, using the friction resistance and friction wheel arc deviation mechanism to prevent and correct belt deviation, to achieve the role of center adjustment. Roller performance features: 1, very high wear resistance, very low friction coefficient, not easy to wear the belt; 2, excellent self-lubrication, no oil, not easy to jam in harsh conditions; 3, anti-static, anti-combustion, anti-aging, anti-chemical (acid, alkali and organic solvents) corrosion; 4, can withstand repeated impact, vibration; 5, the use of environmental temperature range: -40 ° C -90 ° C; 6, excellent mechanical performance, light weight, easy installation, no maintenance; 7, low noise (3-7DB) , smooth operation, long life (3-5 times of the life of the metal idler)