Solifugae have no venom glands and no venom delivery apparatus. What they do have is a pair of chelicerae proportionally larger than in almost any other arachnid, each with two opposing pincer-like segments that shear prey apart mechanically. A bite from a large individual can break human skin and hurt, but nothing is injected.
Speed estimates in circulation are badly inflated. Published figures put the fastest solifugids at roughly 16 kilometres per hour, which is genuinely quick for an arachnid but far below the frequently repeated 40. The largest species reach around 12 to 15 centimetres including legs; most are considerably smaller.
The habit that seeded the legends is real but misread. Camel spiders avoid direct sun and will run toward the shade cast by a standing person, which looks exactly like a charge. They do not chase people, do not burrow into camel stomachs, and do not anaesthetise sleeping humans. Their actual biology, including how long most species live, remains poorly documented.