The Timing Hub consists of three major elements: the front flange with 34 holes located about its perimeter, a back flange with 32 holes located about its perimeter, and a pair of drive bolts. The ratio of 34:32 provides for two unobstructed holes for virtually any flange position. These unobstructed holes, located 180 degrees apart, receive the drive bolts, thus securing the flanges together, allowing torque to be transmitted from one to the other.

In operation, the front flange is typically keyed and locked to the drive shaft, while the back flange carries the driven shaft, gear or pulley. When the output element (chain flights, printing cylinder, applicator head etc.) requires adjustment, simply remove the drive bolts, rotate the back flange to the appropriate phase angle and reassemble the Timing Hub. Each consecutive set of holes creates 2/3 of 1 degree phase adjustment.