Hub Calculation Dimensioning the hub with regard to clamping set pressure

To ensure the proper function of the shaft-clamping set-hub connection, it is essential that the hub can withstand the contact pressure applied by the clamping set (specified as "hub pressure" in our data sheets).

The decisive factor is the wall thickness of the hub and therefore, for a given inner diameter defined by shaft and clamping set, the minimum required outer hub diameter.

The following calculation is intended as a simplified design aid.

Please note that the outer hub diameter is calculated with a safety factor of 1. In practice, the selected outer diameter should be chosen accordingly larger.

Hub inner diameter:
mm

corresponds to the clamping set outside diameter (from data sheet)

Hub contact pressure:
MPa

value from the selection list or from the data sheet

Hub material selection: St37-2 → 235MPa"; St52-3 → 335MPa"; St60-2 → 315MPa"; Cf53 → 340MPa"; 42CrMo Da < 100 → 650MPa"; 42CrMo Da > 100 → 500MPa"; 34CrNiMo Da < 100 → 800MPa"; 34CrNiMo Da > 100" → 600MPa"; 1.4301 → 190MPa"; GGG-40 → 250MPa"; GGG-60 → 370MPa"; AlSi1Mg → 255MPa"; AlZnMgCu1,5 → 410MPa"; Yield strength:
MPa

Material missing? Enter the value directly and send your suggestion to: nabenberechnung@spannsatz.info.

Installation condition:

0.6

Hub width > 2 x clamping set width

0.8

Hub width = 2 x clamping set width or > (1 + number of clamping sets) x clamping set width

1.0

Hub width = clamping set width

Here, clamping set width means the effective width used for clamping.

Result: min. hub diameter (safety factor = 1):

0

mm

All information is provided without guarantee. The values calculated here must be verified for the actual design case.