发明名称 |
ROTARY DRILL BIT |
摘要 |
A rotary drill bit assembly comprising a trunnion and at least one rotary cutter mounted on the trunnion. The trunnion is supported by bearings including at least one radial bearing and at least one axial roller bearing. The axial bearing is comprised of conical rollers and one of the races for this bearing is disposed perpendicular to the axis of rotation of the rotary cutter and the complementary bearing race is conical. A guide rim is associated with one of the bearing races which guides the conical rollers in a radially outward direction. |
申请公布号 |
AU4918679(A) |
申请公布日期 |
1980.04.03 |
申请号 |
AU19790049186 |
申请日期 |
1979.07.24 |
申请人 |
SANDVIK AB AND AKTIEBOLAGET SKF |
发明人 |
ARMIN OLSCHEWSKI;MANFRED BRANDENSTEIN;LOTHAR WALTER;DR. HEINRICH KUNKEL;GOSTA NORLANDER |
分类号 |
E21B10/22;F16C19/30;F16C19/54 |
主分类号 |
E21B10/22 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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