Rotary drill bit with rotary cutter

Patent · Mon Mar 16 23:00:00 EST 1981

OSTI ID:6259783

Brandenstein, M; Kunkel, H; Olschewski, A; Walter, L

A rotary drill bit having a drill bit body and at least one trunnion projecting from the drill bit body and a rotary cutter supported on at least one radial roller bearing on the trunnion. The rolling elements of the bearing are guided on at least one axial end facing the drill bit body in an outer bearing race groove incorporated in the bore of the rotary cutter. The inner bearing race groove is formed on the trunnion for the rolling elements of the radial roller bearing. At least one filling opening is provided which extends through the drill bit body and trunnion and is essentially axially oriented having one terminal end adjacent the inner bearing race groove and at least one filler piece for sealing the opening.

• Assignee: Sandvik Ab Fack And Aktiebolaget Skf (Sweden)
• Patent Number(s): US 4256193
• OSTI ID: 6259783
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420206* -- Engineering-- Mining & Drilling Equipment & Facilities-- (1980-1989)
BEARINGS
DESIGN
DRILL BITS
DRILLING EQUIPMENT
DRILLS
EQUIPMENT
ROLLER BEARINGS
ROTARY DRILLS