The cylindrical bore and outside surfaces of the clamping set must be completely covered by the connecting components.

Manufacturing tolerance of the hub bore: H7 (H6 for stringent concentricity requirements, e.g. in gears).

Manufacturing tolerance of the shaft: h5 (max. h6).

The shaft and bore must be cylindrically machined with a mean peak-tovalley heigh of 
Rz = 2,5...6,3 microns.
 

To ensure that the stress exerted on the hub or housing bore remains within the elastic range, we recommend the following minimum wall thickness:

• C 45 steel                               = 0,6x(d2-d1)
   
• aluminium-
  alloys                                      = 1,0x(d2-d1)
  Minimum strength F 38
  Only permissible when used as a 
  connecting element. Not suitable
  in case of high alternating tension
  and compression stress.
   
• grey cast iron GG25             = 1,0x(d2-d1)
  (shrinkage free cast)
  

Precise calculation of occuring housing tension levels is only possible within limits due to the complexity of different applications. In critical cases, we recommend executing a clamping test under operating conditions.

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