A　new-type　nonlinear　tuned　mass　damper　(TMD)　containing　an　additional　element　of　elastic　support　dry　friction　compared　with　the　common　linear　TMD　is　proposed　to　suppress　machining　chatter.　The　design　and　tuning　process　of　this　nonlinear　TMD　have　used　a　combination　of　analytical　modeling　with　experimentally　measured　frequency　response　function　(FRF)　of　the　machining　system.　Theoretical　studies　and　experimental　results　show　that　the　proposed　nonlinear　TMD　can　remarkably　improve　the　machining　stability　by　effectively　suppressing　the　magnitude　of　the　real　part　of　the　FRF　of　the　damped　machining　system.　(C)　2010　Elsevier　Ltd.　All　rights　reserved.