Plate from 18th century encyclopedia showing illustrations of a cannon boring machine together with a bomb caliber compass. The compass was used to calculate the size,weights and trajectories of different munitions. In machining,boring is the process of enlarging a hole that has already been drilled (or cast),by means of a single-point cutting tool (or of a boring head containing several such tools),for example as in boring a gun barrel or an engine cylinder. Boring is used to achieve greater accuracy of the diameter of a hole,and can be used to cut a tapered hole | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Parker, David |
Bildgröße: | 4285 px × 7205 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |