Example of designation of the ATP type coupling with the nominal torque of Mn=510 Nm, brake drum diameter of DH=320 mm, distance of the brake drum symmetry axis from the hub origin of LH=105 mm, hub holes diameters of d1=50 mm, d2=60 mm, hub holes lengths of l1=90 mm, l2= 110 mm, size of 053, in the A variant:
510-320-105-50/90-60/110-053 ATP-A Brake coupling