Black Hub

The Black Hub is a maintenance and supply station located somewhere within Cybertronian space, and boasts a large orbital shipyard capable of servicing Titans.

Fiction

2019 IDW continuity

After her first bout with Vigilem, Orion Pax sent Lodestar and her cityspeaker Lightbright to the Black Hub for a full weaponized refit. Swindle's Once she'd been kitted out with a new hull and a suite of anti-Titan artillery, she and Lodestar picked up Scattershot and his Technical Solutions team before setting out to find Vigilem.

Some time later, after finding and eliminating the rogue Titan in the vicinity of Hexagon, the badly damaged Lodestar and her crew limped back to the Black Hub for repairs. Light/Star