Mounting arrangement for hard metal cutting blades in cutting heads

A mounting arrangement for a hard metal cutting blade in a mounting groove formed in a cutting head in radial positions which are adjustable in steps, said mounting groove having flat front and rear walls, comprising:

• a support plate disposed in said mounting groove with one side thereof, adjacent the rear wall thereof and being connected thereto in formlocking relationship, said hard metal cutting blade being disposed in abutment with the other side of said support plate, a clamping member disposed in said cutting head adjacent said cutting blade and a clamping bolt mounted in said cutting head for biasing said clamping member against said cutting blade and said cutting blade into firm engagement with said support plate, said support plate including a cut-out, a profile plate provided with a tooth structure disposed in said cut-out and said cutting blade including a complementary tooth profile structure in engagement with the profile-structure of said profile plate, and an elastically resilient insert disposed in said cut-out behind said profile plate for elastically biasing the profile structure of said profile plate into play-free engagement with the profile structure on said cutting blade when forced into engagement with one another by said clamping bolt and said clamping member.