发明名称 CINZEL DE ROLO COM ROLOS DE CORTE CONICOS
摘要 In a rotary drill bit assembly, comprising a drill bit body, at least one trunnion and a rotary cutter rotatably supported on the rotary cutter by bearing means including at least one inner roller bearing, the rollers of the inner roller bearings running in a deep radial bearing race groove in the trunnion and a deep radial bearing race groove formed in the bore of the rotary cutter and a filling opening extending generally axially in the trunnion between the inner bearing race grooves, characterized in that the outer bearing facing the drill bit body comprises a tapered roller bearing including a plurality of tapered rollers and wherein the filling opening for the rolling elements of the inner bearing is arranged radially inside the inner bearing race of the tapered rollers in the trunnion.
申请公布号 BR8101502(A) 申请公布日期 1981.09.15
申请号 BR19818101502 申请日期 1981.03.13
申请人 SKF KUGELLAGERFABRIKEN GMBH 发明人 BRANDENSTEIN M;LOTHAR WALTER;OLSCHEWSKI A
分类号 E21B10/20;E21B10/22;F16C19/54 主分类号 E21B10/20
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