Rock bit having a ball bearing raceway with anti-galling materia

Details Rock bit having a ball bearing raceway with anti-galling materia Rock bit having a ball bearing raceway with anti-galling materia

1976-09-07

1977-08-09

Song, Robert R.

Cutlery

308174, F16C 1900

Patent

active

040406806

ABSTRACT:
Galling in the ball bearing raceway of a rotary rock bit is reduced even when the thrust bearings of the rock bit have worn to the point that the ball bearings are loaded by out thrust. The radius of the ball bearing raceway in the bearing pin and/or the cutter includes an inlay of anti-galling material. The anti-galling material insures that any material worn from the raceway will not harm the other bearing elements.

REFERENCES:
patent: 3001837 (1961-09-01), Lamson et al.
patent: 3079204 (1963-02-01), Lamson et al.
patent: 3235316 (1966-02-01), Whanger
patent: 3360312 (1967-12-01), De Wit et al.
patent: 3620580 (1971-11-01), Cunningham
patent: 3950041 (1976-04-01), Miglierini

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