Burrs can be formed on the feed mark ridges and the edges of the machined parts in machining operations. These burrs are undesirable in terms of the surface quality, the precise dimensioning of the machined parts and the safety of operators. This paper demonstrates the effectiveness of using a rotary tool on minimizing the sideward burr formation in machining. In particular, the experimental relationships between the size of sideward burr and the cutting parameters (including tooling mechanism) are established first in rotary machining. Methods to control the size of sideward burr are then explained. The possible application of a rotary tool for deburring operations while engaged in machining is also explored.