Hard-material threaded connection

1. A hard-material threaded connection, comprising:

a structural part having a hard material selected from the group consisting of a cemented carbide, a cermet and a cutting ceramic and having a first threaded portion formed in said hard material; and

a component having higher elasticity than said hard material and having a second threaded portion cooperating with said first threaded portion, said first threaded portion and said second threaded portion having different thread pitches, wherein a difference in said thread pitches amount to more than more than 1.5%.

2. The hard-material threaded connection according to claim 1 , wherein a difference in said thread pitches amounts to between 2.1% and 8%.

3. The hard-material threaded connection according to claim 1 , wherein said first threaded portion is an internal thread.

4. The hard-material threaded connection according to claim 1 , wherein said first and second threaded portions define an internal threaded portion and an external threaded portion, said internal threaded portion has a higher pitch than said external threaded portion.

5. The hard-material threaded connection according to claim 1 , wherein said first threaded portion is configured as an internal thread and is provided with a countersink such that said internal thread is applied so as to be recessed with respect to a surface of said structural part.

6. The hard-material threaded connection according to claim 1 , wherein said structural part which has said hard material is an exchangeable cutter.

7. The hard-material threaded connection according to claim 1 , wherein said hard material is a hard metal or a cermet.

8. The hard-material threaded connection according to claim 1 , wherein a difference in said thread pitches amounts to more than 2%.