Abstract
Research of porting operations made by new metal-cutting instrument – a sectional tool head with asymmetrical hard alloyed plates of different width – of holes in railway rails. The tool head has an enhanced durability, productivity, precision and decrease the form deviation and the roughness of surface proceeded. In the article the principle of work and the design are described, and the engineer analysis of the proposed instrument is conducted via APM WinMachine. The application of modern software allow to design instruments with quality, reliability and competitiveness and to make functional decisions based on a comprehensive engineer analysis which enhances quality of design decisions, reduce the time for instrumental production tooling and research the diversity of cutting modes and parameters of the instrument on a model, and indicate the design weaknesses without a full-scale test.