Where can i get free CAD Models for Industrial Machines?

In order to create digital representation of a Fastener Manufacturing Plant Layout on the software DELMIA, I need 3d models of Industrial Machines like H type Power Press, C Type Power Press, Traub Machine, Thread Rolling Machine, Shot Blasting Machine. Preferred file types: .stp, .step, .igs, .IGS.. Please help me. Thank you.

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