CHIARAVALLI
CLAMPING ELEMENTS
C = 1
MINIMUM HUB DIAMETER
CHECK Dm
After choosing the clamping element type with the required
characteristics it is necessary to make a check on the mini-
mum extern diameter of the hub (Dm), which has to resist to
the solicitations caused by the high pressures developed by
the clamping element. The check is purely static and con-
cerns just solicitations caused by the clamping element:
Dm ≥ D x
C = 0.8
C = 0.6
Rs
0.2 + (Pm x C)
Rs
0.2 - (Pm x C)
Where:
Dm
= Extern diameter of the hub (mm)
D
= Extern diameter of the clamping element (mm)
Rs 0.2
= Yield point for permanent elongation
of 0.2% (N/mm
2
)
Pm
= Specific pressure exercised by the clamping
element on the hub (N/mm
2
)
C
= coefficient of the utilization in function of the
hub profile (Look at the pictures below)
MINIMUM HUB DIAMETER CHECK Dm
L1 = L
L
Dm
L1 = 2L
L
Dm
L1 > 2L
L
Dm
L1 > 2L
L
Dm
L1 = 2L
L
Dm
L1 = L
L
Dm
2