Boring machine

Details Boring machine Boring machine

E - Fixed Constructions

21

D

E21D 9/08 (2006.01) E21D 9/10 (2006.01)

Patent

CA 2169330

A boring machine (10) comprises a cutter head (14) rotatably mounted on a hydrostatic bearing (30). High pressure water is supplied to passageways (35) between confronting bearing surfaces (33 and 34) which react axial and radial loads and which are capable of relative rotational movement. The flow of pressurised water discharges from the passageways (35) to prevent contamination of the bearing (30) by the ingress of material removed by the cutter head (14) in operation.

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