In　this　paper,　non-smooth　bifurcations　and　chaotic　dynamics　are　investigated　for　a　braking　system.　A　three-degree-of-freedom　model　is　considered　to　capture　the　complicated　nonlinear　characteristics,　in　particular,　non-smooth　bifurcations　in　the　braking　system.　The　stick-slip　transition　is　analyzed　for　the　braking　system.　From　the　results　of　numerical　simulation,　it　is　observed　that　there　also　exist　the　grazing-sliding　bifurcation　and　stick-slip　chaos　in　the　braking　system.　(C)　2007　Elsevier　Ltd.　All　rights　reserved.