/r/EngineeringPorn: Engineering Porn - August 24, 2022 - 06:29
/r/MachinePorn: MachinePorn: I think my driveshaft just got torqued. - High quality images of machines and machinery. - August 24, 2022 - 06:29
/r/toolgifs: Tool Gifs - Tool, machine, and manufacturing gifs. Sometimes entertaining, always educational. - August 24, 2022 - 06:28