Bearing retaining pin for earth boring drill

Details Bearing retaining pin for earth boring drill Bearing retaining pin for earth boring drill

E - Fixed Constructions

21

B

255/78

E21B 10/00 (2006.01) E21B 10/22 (2006.01) F16C 19/12 (2006.01) F16C 19/16 (2006.01) F16C 43/04 (2006.01)

Patent

CA 1051864

ABSTRACT OF THE DISCLOSURE A roller cutter type earth boring drill having a ball bearing race filled with ball bearings through an external passage has the passage filled with a bearing retaining plug having a symmetrically cut end portion fitting the curvature of the bearing race.

280921

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