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We report on the energetic and structural stability of configuration-tunable, bi-directional linear bearings based on cap-less, partial segments engineered within individual multi-walled carbon nanotubes (MWNTs). Using computational models, we show that an externally applied excitation force can be used to select an operating bearing configuration with a desired stiffness and operating frequency. Our models also demonstrate the possibility of simultaneous, independent operation of multipledoi:10.1088/0957-4484/20/49/495704 pmid:19904022 fatcat:fv5epvthfzhg5jpb5kjrqwbmfa