Single-edge boring is usually applied for finishing operations and for roughing and finishing in materials where chip control is demanding. A single-edge boring tool may also be a solution when machine power is a limiting factor. | |
Multi-edge boring, involving two or three cutting edges, is employed for roughing operations where metal removal rate is the first priority. High productivity levels can be maintained by allowing two or three inserts, set at the same axial height, each to machine at the recommended feed per tooth. This results in a high feed per revolution through the hole. | |
Step-boring is performed in roughing by a boring tool having the inserts set at different axial heights and diameters. This also improves chip control in demanding materials with the different depths of cut of up to 1.0 or 1.5 times the cutting edge length. Depths of cut of 0.5 times the cutting edge length can be divided into smaller cuts, providing smaller chips. | |
Reaming is a light finishing operation performed with a multi-edge tool giving high-precision holes. Very good surface finish and close dimensional tolerance are achieved at high penetration rates. The pre-machined hole needs to be within close limits and the radial depth of cut is small. | |