In the illustrated embodiment, the core 138 has a circular face 162 with an annular lip 166 extending around the perimeter of the face 162. The engagement surface 154 is formed along the lip 166 on a top side of the core 138. Specifically, the engagement surface 154 is formed by a flattened portion of the annular lip 166. The hub 30 can grip the core 138 along the flattened portion of the lip 166. In other embodiments, the core 138 can be different shapes that are suitable to provide an engagement surface 154 for coupling to the hub 30.

Referring to FIG. 23, the hub 30 includes a power source and other electrical components for operating the pipeline inspection device 10. For example, the hub 30 may include a video processor 170, a battery 174, a wireless communication device 178 (e.g., a Wi-Fi hub, a Bluetooth controller), etc. In other embodiments, the hub 30 may include more or fewer of these electrical components. For examples, in some embodiments, the hub 30 does not include a wireless communication device 178, but rather, includes wired connections to the monitor 114 and other components. Similarly, in some embodiments, the hub 30 does not include a video processor 170. Instead, the video processor 170 may be integrated into the monitor 114. In some embodiments, the wireless communication device 178 includes one or more wireless transceivers communicatively coupled to one or more antennas to allow the wireless communication device 178 to communicate bidirectionally with other devices that include a wireless communication device similar to the wireless communication device 178.