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Bearings for pumps and compressors

100%

Panda A. , Jurko J.

tom Z. 10, Vol. 2

271-275

Contribution presents near specification of bearings, that are suitable for placing shafting pumps and compressors, how by using standard bearings. This specification respect how on technical requirements, like this too on ekological safeness of equipment and his optimally life. In contribution are put on the stage test results, that were carried out before opening delivery of bearings in pumps for Bosch company.

Elementary Study of the Machinability During Drilling of Stainless Steels X2Cr18Ni8

80%

Jurko J. , Mrkvica I. , Zaborowski T.

tom R. 88 nr 4CD

111--115

Precise and reliable information on the machinability of a material before it enters the machining process is a necessity, and hypotheses must be tested through verification of actual methods. This article presents conclusions of machinability tests on austenitic stainless steels X2Cr18ni8and describes appropriate parameters for the cutting zone during the process of drilling. The article focuses on the analysis of selected domains through four basic some parameters of steel machinability.

Przed wdrożeniem nowych tworzyw konstrukcyjnych do procesu obróbki skrawaniem niezbędne są precyzyjne i niezawodne informacje o ich obrabialności, przy czym powinny być one sprawdzone aktualnymi metodami. W artykule przedstawiono wnioski z badania obrabialności austenitycznej stali nierdzewnej X2Cr18Ni8, opisano także właściwe parametry strefy skrawania w procesie wiercenia. W artykule skupiono się na analizie czterech podstawowych parametrów obrabialności stali w wybranych zakresach.

Verification on cutting zone machinability during the turning of a new stainless steel and accompanying phenomena

80%

Jurko J. , Gajdoš M. , Zaborowski T.

tom Z. 16

33-40

The study presents the results of machinability tests on a new X8Cr20Ni10TiMo austenitic stainless steel which is applied to food processing industry, and it also describes important parameters of the cutting zone during the process of turning. The paper discusses the analysis of selected domains through basic indicators of steel machinability. In the cutting tests, cutting speeds ranged from 80 to 150 m/min, the feed rate - from 0.1 to 0.6 mm. The CNMG 080408-MF solid carbide indexable insert was used. The value of the tool wear criterion, VBK, was 0.3 mm. Chips were analysed with Scanning Electron Microscopy (SEM).