Boring head

Details Boring head Boring head

E - Fixed Constructions

21

B

255/75, 255/78

E21B 10/08 (2006.01) E21B 10/22 (2006.01)

Patent

CA 1158636

Abstract A boring head for reaming a pre-drilled hole in raise boring or for similar earth cutting operations comprising a plurality of roller cutters (13, 14), each Or which being rotatably journalled over a bearing system. The bearing system comprises a split roller bearing (60) having axially spaced rollers (62, 63) which are separated by a loose guide ring (69).

383799

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