Standard regulations of the state of v-belt type O, A, B, C, D, E, F seven kinds of models, there are three kinds of corresponding pulley wheel groove Angle 34 °, 36 °, 38 °, and rules for each triangle model corresponding to each of the small pulley groove Angle zui small diameter, large pulley provisions have been made. Pulley groove Angle is divided into 32 degrees 34 to 36 degrees, 38 degrees, according to specific choice of pulley groove diameter and benchmark choice; The pulley groove Angle related to the diameter of the pulley, different models of belt pulley groove Angle under different diameter range recommended number of pulley groove Angle is as follows: O pulley on the pulley in 50 mm to 71 mm diameter range is 34 degrees; When the 71 mm to 90 mm to 36 degrees, & gt; 90 mm is 38 degrees; Type A pulley on the pulley diameter range is 34 degrees in 71 mm to 100 mm, 100 mm to 125 mm to 36 degrees;> 125 mm is 38 degrees; Type B pulley on the pulley in 125 mm to 160 mm diameter range is 34 degrees; 160 mm to 200 mm to 36 degrees, & gt; 200 mm is 38 degrees; C type pulley on the pulley in 200 mm to 250 mm diameter range is 34 degrees, 250 mm to 315 mm to 36 degrees, & gt; 315 mm is 38 degrees; Type D pulley on the pulley in 355 mm to 450 mm diameter range of 36 degrees, & gt; 450 mm is 38 degrees; E 500 mm to 630 mm to 36 degrees, & gt; 630 mm is 38 degrees. Knowledge transmission belt, you can reference Uliflex drive website content for understanding and learning or log on to http://www. lilainuo。 Com, regularly updated information content let everybody timely grasp industry trends, welcome the attention.