This article deals with the measurement and evaluation of the circularity of the machine DMG MORI -DMU 50 using the measuring system Ballbar QC20-W, which can measure the circularity of the machine using circular interpolation. Furthermore, the system can evaluate machine errors or measurement errors. This can prevent a number of problems, such as financial losses, compliance with the required accuracy and adherence to order deadlines. All three planes of the machine tool were measured -XY, YZ and ZX. In each plane, accuracy (roundness deviations) was measured at three values of feed rate 1000, 1500 and 2000 m.min-1. Each measurement was evaluated and in the end the dependence in individual planes on the feed rate is given.

This article deals with the evaluation of changes in mean values of the individual components of cutting forces and measuring the roughness parameters after machining variable cutting conditions such as cutting speed and feed rate. Were evaluated 3 materials from different classes' machinability: steel 14109, alloy CuZn40Pb2 and brass AlCu4PbMg. The materials have been chosen with respect to their use in the extrusion method of the ECAP. The experiment was carried out on the machine SUI 40, the forces were measured on a dynamometer KISTLER 9441 and on the roughness equipment Hommel Tester T2000. All measurements will be evaluated in tables and graphs. The results could be used in abbreviated testing machinability as indicative.

The paper is focused on the influence of the coolant pressure on the surface roughness of the workpiece when machining stainless steels. The components were machined on a STAR SR-32J dual spindle machining center and an external cooling unit HYTEK CHAV 160/150-AF-F-OL was used for cooling. Two stainless steel components were investigated, namely the gas control valve rod and the high-pressure control valve housing, which require low roughness Ra after machining (less than 0.375 and 0.25 micrometers respectively). The first component was tested at 8 different pressures in the range of 150 bar -10 bar and the second component at 4 different pressures in the range of 120 bar -10 bar. The roughness parameters were measured by the contact method using the MITUTOYO Surftest SJ-410 Roughness Tester and the Alicona InfiniteFocus optical microscope. Based on these sample input parameters, it was evaluated how much the pressure affects the surface quality or suggested its reduction due to the high cost of operation of the external high-pressure equipment.

Residual stresses are undesirable and it should not be underestimated. They occur in many components and it is necessary to identify and try to avoid them. For detection the Residual stresses, there are many methods, but not all are suitable, because they can completely destroy of the components. The article deals with the evaluation of Residual stresses in the inner rings of Bearings, which are made from steel 100Cr6 (ČSN 14 109.4. The surfaces were turning at different cutting parameters and subsequently are evaluated Residual stresses. The stresses have been evaluated by non – destructive method X – Ray. The experiment was realized in cooperation Faculty of Mechanical Engineering VSB – TU Ostrava and Faculty of Mechanical Engineering of ZU Zilina – machining in the laboratories of ZU Žilina, Slovak Republic.

In today's competitive times overall development of the technology is moving somewhere further, including automotive industry, which went toward relieving material. One of the many materials which are applied in the automotive industry, are polymers. The aim of the article was to test three different types of cutters for machining material group N -nonferrous metals. The article was tested three different types of cutters from different vendors on electro material SKLOTEXTIT G 11 and samples size 12x100x500mm. The entire experiment was conducted in a company Slavík-Technické plasty on the machine tool SCM RECORD 220. In the conclusion are technical-evaluation, experimental results and conclusions for company.