DEEP-DRILLING MACHINE Russian patent published in 1998 - IPC

FIELD: machining, in particular, deep-drilling machines. SUBSTANCE: the machine has extensible spindle head 1 for attachment of drill 3 and body 5 of the pulp container coaxially installed in a fixed post. Extensible casing 7 with guide bush 9 of drill 3 is mounted in the front part of the pulp container cylindrical space. The pulp container space on the side of spindle head 1 is closed with flange 17, connected to which is hollow sleeve 18 carrying the intermediate support of the shank of drill 3. Hollow sleeve 18 is positioned in the space of the pulp container. The side surface of hollow sleeve 18 is taper - or step-shaped. The hollow sleeve is secured in flange 17 with its larger base. On the side of spindle head 1 hollow sleeve 18 has a free space. EFFECT: enhanced efficiency. 3 cl, 1 dwg