Patent ID: 9399259
Filing Date: 2016-07-26
CPC Classification: B23B,Y10T

Claim Text:
1. A boring device comprising: a hollow main shaft; a table supporting the main shaft rotatably about a predetermined axis; a tool holder having a spindle extending in the form of a bar, the tool holder being configured to rotate coaxially with the main shaft; a radially protruding tool provided at a distal end portion of the spindle of the tool holder; a tilting unit provided between the main shaft and the tool holder in the axis direction and configured to incline the tool holder from the axis; a drawbar configured to be movable back and forth in the axis direction within the main shaft; a first drive unit configured to rotate the main shaft about the axis; and a second drive unit configured to move the drawbar back and forth in the axis direction, wherein the tilting unit includes: