Machine Tool Industry Research Association

Machine Tool Industry Research Association (MTIRA - UK). 

Results reported so far correspond to the slot cutter specified in Table 1.6, and used in previous work. However, tests performed by machine-tool markers generally follow the recommendations of the Machine Tool Industry Research Association (MTIRA), and these involve the use of a helix cutter. As pointed out, with the slot cutter the limiting factor of machine performance is the onset of chatter, while with the helix cutter it is both the onset of chatter and the available driving horsepower. It is clearly of practical interest to establish whether the theory of chatter allows the prediction of the stability for both types of cutter. 

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