Product Name： Friction -aligning roller Category： Conveyor Roller/Idler Manufacturers： Golden Sun Order>> Product Details Friction -aligning the upper and lower idler group used to adjust the belt running side to prevent the snaking to ensure stable operation of the conveyor belt . The various idlers advanced structure , reliable performance , roll paper timber through a rigorous selection process , the use of high-quality special welded pipe , a strict tolerance requirements . Shaft material using cold drawn round steel, bearing is made of high qualified steel plate stamping , PDC type seal structure , three sealing devices , dustproof, waterproof properties is good. The assembly to roll strength, radial runout quantity is small, the rotary resistance is small, light weight, low energy consumption, long service life. Product parameter: Summary of the roller size: Standard Diameter Length Scope Idler's Shell Wall Thickness Bearings Type mm lnch mm mm min-max 63.5 2 1/2 150-3500 3.0-3.75 204 76 3 150-3500 3.0-4.0 204 205 89 3 1/3 150-3500 3.0-4.0 204 205 102 4 150-3500 3.5-4.0 204 205 305 108 4 1/4 150-3500 3.5-4.0 204 205 305 306 114 4 1/2 150-3500 3.5-4.5 205 206 305 306 127 5 150-3500 3.5-4.5 204 205 305 306 133 5 1/4 150-3500 3.5-4.5 205 206 207 305 306 140 5 1/2 150-3500 3.5-4.5 205 206 207 305 306 152 6 150-3500 4.0-4.5 205 206 207 305 306 307 308 159 6 1/4 150-3500 4.0-4.5 205 206 207 305 306 307 308 165 6 1/2 150-3500 4.5-6.0 207 305 306 307 308 177.8 7 150-3500 4.5-6.0 207 306 307 308 309 190.7 7 1/2 150-3500 4.5-6.0 207 306 307 308 309 194 7 5/8 150-3500 4.5-6.0 207 307 308 309 310 219 8 5/8 150-3500 4.5-6.0 308 309 310