How To Size A Timing Belt. On metric sizes the number is how wide the timing belt is in millimeters. 3) maintain the pulley strength after modifi cation.
Measure the width of the timing belt. Click here to select an appropriate belt. It should have about 3/4″ of play.
Normally the belt is wrapped around two pulleys with 180° of the belt touching each of the two pulleys.
As the existing centres are 2500 mm the total extension will be 2.5 x 1.375 = 3.44 mm. Measure the pitch (see diagram). Reference belt width (w p) which depends on the belt type is multiplied by a factor that takes into consideration the desired design power of the system (p d), the reference transmission capacity (p s) and the engagement correction coefficient (k m). 2 global vehicle timing belt production