diff --git a/Drilling.cpp b/Drilling.cpp
index 720ad98..0aaa5f0 100644
--- a/Drilling.cpp
+++ b/Drilling.cpp
@@ -1650,7 +1650,7 @@ Drilling::GenerateHoleCl( int nInd, const SelData& nCircId, const string& sPName
    if ( FromString( ExtractInfo( m_Params.m_sUserNotes, "MaxElev="), dMaxElev)  &&  dElev > dMaxElev) {
       dElev = dMaxElev ;
       hole.ptIni += hole.vtDir * ( dElev - hole.dLen) ;
-      hole.dLen = dElev ;
+      hole.dLen = ( hole.dLen > 10 * EPS_SMALL ? max( dElev, 10 * EPS_SMALL) : dElev) ;
    }
   // limito lunghezza foro a massima lavorazione della punta
    double dAddLen = ( hole.bBlind ? 0 : m_Params.m_dThroughAddLen) ;
diff --git a/EgtMachKernel.rc b/EgtMachKernel.rc
index 7c07ad0..f9f561e 100644
Binary files a/EgtMachKernel.rc and b/EgtMachKernel.rc differ