Issue 22

D. Gentile et alii, Frattura ed Integrità Strutturale, 22 (2012) 85-92; DOI: 10.3221/IGF-ESIS.22.09 89 In Fig. 5 the spindles group has been reported. All the spindles are connected at the same asynchronous engine capable to reach a 4500 rpm speed. Load cells are connected under the spindles plane, (not reported in the figure), counterbalanced by special gas springs in order to grant better applying load method. Best operating conditions for this machine are: 5 specimens and 3000 rpm engine’s speed. Figure 3 : Spindle body. Figure 4 : Driven shaft.