Basic Turning

Tool overhang and L/D

L/D is a ration between the length by which a boring bar hangs out from the tool post to the actual cutting edge (tool overhang: L) and the tool diameter


For boring, the deeper the hole to be machined is, the longer the boring bar needs to be. However, if the boring bar is too long then vibrations, chatter, will occur. Therefore it is important to take into consideration the L/D when setting cutting conditions and selecting the shank material.

- Click below to read more about each type!