diff --git a/LuaLibs/FacesBySaw.lua b/LuaLibs/FacesBySaw.lua
index 49ba440..ebf2f8e 100644
--- a/LuaLibs/FacesBySaw.lua
+++ b/LuaLibs/FacesBySaw.lua
@@ -407,7 +407,10 @@ function FacesBySaw.MakeOne( nSurfId, nFacet, sCutting, dSawDiam, Par5, dVzLimDw
    EgtOutLog( 'vtN=' .. tostring( vtN) .. ' vtRef=' .. tostring( vtRef) .. ' vtOut=' .. tostring( vtOut) .. ' vtAux=' .. tostring( vtAux), 3)
    local nSCC = MCH_SCC.NONE
    if not BD.TURN then
-      if abs( vtAux:getX()) > abs( vtAux:getY()) - GEO.EPS_SMALL then
+      -- per ora aggregato usato in verticale solo in split e headcut; Fast non influenzata
+      if BD.C_SIMM and bMaximizeVerticalDepth then
+         nSCC = MCH_SCC.ADIR_ZM
+      elseif abs( vtAux:getX()) > abs( vtAux:getY()) - GEO.EPS_SMALL then
          nSCC = EgtIf( ( vtAux:getX() > -GEO.EPS_SMALL), MCH_SCC.ADIR_XP, MCH_SCC.ADIR_XM)
       else
          nSCC = EgtIf( ( vtAux:getY() > -GEO.EPS_SMALL), MCH_SCC.ADIR_YP, MCH_SCC.ADIR_YM)