All parts are made of steel. The thread ring, the tilting ring and the pressure ring are hardened and tempered. The outside diameter, the borehole and the end face of the clamping nut are ground.

The modified clamping screw and the fixing screws are all cheese-head screws to ISO4762. 

The metric thread d1 is produced to tolerance class "fine" (tolerance 5H, DIN 13 part 21.... 25). The locating bore d2 of the pressure ring is configured to tolerance H7.

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