FAC System
FAC System is a mechanical construction set, invented by Swedish artist Mark Sylwan and launched in 1952. It uses metallic parts, and extensively uses {{nowrap|4 mm}} steel rod.{{cite web|title=The FAC Construction System|url=http://web.telia.com/~u13101111/mecweb/fac.html|access-date=2007-10-28|archive-url=https://archive.today/20121216114827/web.telia.com/~u13101111/mecweb/fac.html|archive-date=2012-12-16|url-status=dead}} 100929 web.telia.com{{cite web|title=FAC-system|url=http://www.facsystem.se/default_eng.asp}} 100929 facsystem.se{{cite web|title=FAC System|url=http://meccanokinematics.net/fac/models/}} The company continued in business {{As of|2013|lc=on}}, supplying kits stated to give industry a basic construction system which gives the same freedom in 3D design as is available from the drawing board and CAD/CAM. Kits are suitable, and priced as, for laboratory work and teaching.[http://www.facsystem.se/utrustningspaket_eng.asp FAC system: equipment kits]
Shafts have a diameter of 6 mm, and have a groove along the shaft. Gears or other wheels have a bevel on either side of the hub of the wheel. A special sheet metal angle fits into this chamfer, and when the wheel is mounted on an axle, this sheet metal angle will fit into the groove on the axle. The design allows the wheel to be fixed on the axle and the stop screws on the wheel only have the task of ensuring that the wheel does not move along the axle.{{Cite web |title=archive.ph |url=http://web.telia.com/~u13101111/mecweb/fac.html |access-date=2022-11-01 |website=archive.ph |archive-date=2012-12-16 |archive-url=https://archive.today/20121216114827/web.telia.com/~u13101111/mecweb/fac.html |url-status=bot: unknown }}