self tightening claw for truck crane toy bruder crane
cults3d
a claw for truck crane bruder with a spring system for automatic clamping you need 4 screws 4x20 + nilstop nuts, you also need a threaded hook M5 about 70mm long + nilstop nut + washer and a small compression spring not too hard with an inner diameter greater than 5mm. there are 4 small plates of connection, it will be necessary to pass them in the holes of the claws then to heat and to crush the end of the axes to widen them a little so that they cannot go out, idem for the holes of the mobile hub (see photographs) I have attached the SKP files in .rar for those who want to adapt the model to their needs.
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