Tool holder and tool arrangement

A tool holder, comprising:

• at least one mounting surface for being received and driven by a drive spindle;
• a first fluid path for an operating fluid;
• and
• at least a first flow blocking member arranged within said fluid path;
• wherein said flow blocking member is configured for blocking or releasing said fluid path, depending on flow direction.

A tool arrangement, comprising:

• a tool holder, comprising:
• at least one mounting surface configured for being received and driven by
• a drive spindle;
• at least one fluid path for an operating fluid;
• and
• at least one flow blocking member arranged within said fluid path;
• wherein said flow blocking member is configured for blocking or releasing said fluid path, depending on flow direction;
• and
• a machining tool attached to said tool holder;
• wherein said at least one fluid path is configured for conducting said operating fluid from said drive spindle to said machining tool;
• wherein said fluid path is selectively activatable by way of said flow blocking member;
• and
• wherein said operating fluid is at least a coolant or a lubricant.