Using of a Boring Bar A boring bar is used in the cutting of an inner suface. It can make the hole, which has a big diameter, which is needed an accurate diameter, and which is needed a high surface roughness.
How do I choose a boring bar?
The key to choosing the appropriate shank diameter is to compare the minimum machining diameter of the boring bar, the required bore diameter, and to choose a shank diameter as large as possible. However, if the shank diameter is too close to the bore diameter, chip control can be a problem.