Rotary drill bit with rotary cutter

Details Rotary drill bit with rotary cutter Rotary drill bit with rotary cutter

E - Fixed Constructions

21

B

255/78

E21B 10/22 (2006.01) F16C 19/30 (2006.01) F16C 19/54 (2006.01)

Patent

CA 1111832

ABSTRACT A roller cutter_tcol has a roller-cutter mounted on a trunnion to rotate in radial and axial bearings. The axial bearing is a taper- roller bearing, one race of which is planar so that this bearing can accommodate play arising as a result of wear in the radial bearing.

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