Arrangement for mounting of a rotation element in a drilling...

Details Arrangement for mounting of a rotation element in a drilling... Arrangement for mounting of a rotation element in a drilling...

E - Fixed Constructions

21

B

255/40

E21B 6/00 (2006.01)

Patent

CA 1297868

Abstract of the disclosure An arrangement for mounting of a rotation element in a drilling machine comprising a body (1) and a rota- tion element (8) mounted by means of bearing surfaces (8a, 8b) rotatably in the body for rotation of a drill shank (9). The rotation element is rotated by a rota- tion machinery (10) in engagement with a gear ring (11) of the rotation provided in the rotation element between the bearing surfaces. In order to replace the rotation element without having to disassemble the body, the ro- tation element is mounted at both ends thereof in the radial direction in an integral body part (3), and the bearing surfaces and the gear ring are arranged in a stepped manner so that the rotation element is removable from the integral body part axially through one end (3c) thereof. (Figure 1)

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