ROLLER BIT BEARING Russian patent published in 1995 - IPC

Abstract RU 2030541 C1

FIELD: rock cutting tools. SUBSTANCE: roller bit bearing has journal, roller cutter, lock of ball bearing in form of locking pin and permanent magnet. Locking pin has race for ball bearing on its front end. Shank of pin has circular recess for permanent magnet. Part of pin between permanent magnet and race has longitudinal grooves. Magnet is ring- shaped. Length of circular recess of locking pin exceeds the length of permanent magnet. EFFECT: higher efficiency. 2 cl, 2 dwg

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RU 2 030 541 C1

Authors

Bogomolov R.M.

Panin N.M.

Torgashov A.V.

Tatarchuk Ju.S.

Bulgakov E.S.

Smirnov V.G.

Dates

1995-03-10—Published

1990-12-10—Filed