Mini disk bit

Details Mini disk bit Mini disk bit

2005-08-30

2005-08-30

Bagnell, David (Department: 3672)

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

C175S371000

Reexamination Certificate

active

06935443

ABSTRACT:
A small sized disk bit includes a bit holder accommodated in a bearing journal on its side (overhangingly), and a disk body with asymmetrically designed wedge flanks mounted rotatably thereon. To enable the disk body to absorb high radial and axial strong forces encountered during the engagement of the disk on a solid rock, the disk body is designed as a one-part disk body with a blind hole with its surface and the bearing journal surface being designed as components of the bearing. The bearing involves the combination of a radial and thrust bearing each, where the thrust bearing is milled into the track of the radial bearing. A ball bearing is used as the axial bearing and a needle roller bearing, a cylindrical roller bearing or a slide bearing is used as the radial bearing. The diameter of the ball bearing is larger than the diameter of the needle rollers, or the cylindrical rollers or the thickness of the sliding bush of the slide bearing.

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G. Kunze and A. Ehler, Germany and B. Goericke, Russia, Apr./Jun. 2001,Continuous Mining Process in Solid Rock, Surface Mining Braunkohle & Other Minerals 53 (2001) No. 2 Apr./Jun.
W.M. Lizunkin, B.L. Goericke, J.B. Uzyr, 1999,Mechanical Mining of Hard Ores Occurring in Layers of Small Thickness in Underground Mining, Chita (Russia), 1999, p. 130.

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