Means of mounting a revolving cutting element

Details Means of mounting a revolving cutting element Means of mounting a revolving cutting element

1993-01-06

1994-10-04

Hannon, Thomas R.

Bearings

Rotary bearing

Roller drill bit

175371, E21B 1022

Patent

active

053520459

ABSTRACT:
In an assembly made up of a spindle formed integrally with a revolving cutting element, the longitudinal axis of the spindle being the axis of rotation of the cutting element, the spindle is set into a cylindrical bearing. The bearing is fixed in the main body of the bit. The bearing element and a plate form a thrust surface with the end of the bearing at right angles to the axis of rotation of the spindle, which the other end of the bearing element made with the flange projecting outwards is held in the cutting element by means of the retaining ring which is fixed in the cutting element. A thrust surface at right angles to the axis of the rotation of the spindle is created between the top end of the bearing element and the cutting element and another between the retaining ring and the main body of the bit. By maintaining the spindle centrally in the bearing the wear on the bearing is radically reduced.

REFERENCES:
patent: 3847235 (1974-11-01), Goodfellow
patent: 4157122 (1979-06-01), Morris
patent: 4181377 (1980-01-01), Oelke
patent: 4478299 (1984-10-01), Dorosz
patent: 4625816 (1986-12-01), Takano
patent: 4874047 (1989-10-01), Hixon
patent: 5064007 (1991-11-01), Kaalstad

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