INTERNATIONAL JOURNAL ON ORANGE TECHNOLOGY https://journals.researchparks.org/index.php/IJOT e-ISSN: 2615-8140 | p-ISSN: 2615-7071 Volume: 03 Issue: 12 |Dec 2021 © 2021, IJOT | Research Parks Publishing (IDEAS Lab) www.researchparks.org | Page 1 Copyright (c) 2021 Author (s). This is an open-access article distributed under the terms of Creative Commons Attribution License (CC BY).To view a copy of this license, visit https://creativecommons.org/licenses/by/4.0/ Effect of Magnetic Field on the Properties of Flowing Lubricating Cooling Liquids used in Manufacturing Process Erkin Odilov, Ma’murjonov Dilshod Faculty of Mechanic, Tashkent state technical university, Tashkent, Uzbekistan Umidjon Mardonov Faculty of Machine construction, Tashkent state technical university, Tashkent, Uzbekistan --------------------------------------------------------------***------------------------------------------------------------- Annotation: In this paper, the effect of magnetic field on cooling liquids, which are used in the heat treatment process in manufacturing, was studied. We chose three different lubricating cooling liquids that are commonly used in local manufacturing factories to conduct the experiment. Three main properties of these lubricoolants such as boiling point and kinematic viscosity were analyzed after magnetizing them. The article shows the results of these comparisons and analyze the magnetic field influence on different types of fluids. Keywords: Boiling point, cutting, liquid, magnetic field, manufacture Introduction There are many scientific works about the effect of magnetic field on the physical and chemical properties of water. When magnetic field effects on liquids they become magnetized liquids. V.E Nikolskiy [1] analytically and experimentally investigated the influence of magnetic and electric fields with tension gradient in the direction of the movement of the contacting gas-liquid phases. F.L Rashid and his colleague [2] presented an investigation of water evaporation through magnetic field of 0.5 T, which was located at different location of tested water height (water-air interface, water mid-height, and bottom). M. Amiri and A.A Dadkhah [3] investigated whether or not a physical water treatment reduces the surface tension of water as reported in some scientific literature. V.N Tritigin et al. [4] studied the influence on the microflora of water-oiled lubricating cooling liquid of a weak electromagnetic pulse field. I.M Ageev [5] has noted that one of the hypotheses explaining the effect of a weak magnetic field on biological objects is a change of water properties which is their part. S.M Hassan and R.A Rahmon’s study [6] is a step towards gaining a better understanding of the effect of magnetism on water properties and on the biology of culture organisms, such as the brine shrimp, A. salina. Christian Baresel and others [7] have taken the concept of water treatment by functionalized magnetic particles one step forward by integrating the technology into a complete proof of concept, which included the preparation of surface-modified beads, their use as highly selective adsorbents for heavy metals ions (Zinc, Nickel), and their performance in terms of magnetic separation. U.T. Mardonov et al. studied the effect of magnetic field on the dynamic viscosity coefficient of flowing water, they found that the dynamic viscosity coefficient of water changed after magnetization [8]. The effect of magnetic field on liquids is still a controversial issue, and there are a lack of researches about that. Almost all of the researches about magnetic field effect on liquids were conducted on water and the majority of those researches used in the agriculture field and using this issue in the manufacturing process would have a great advantage. Although many researches about the influence of magnetic field on some parameters of water have been reported from many studies, no scientific works analyzed the effect of magnetic field on cooling liquids used in heat treatment process. Especially the effect on kinematic viscosity and boiling point are the most important parameters of cooling liquids used in the heat treatment. Analyzing the influence of magnetic fields on the properties of lubricants would help to increase the efficiency of machining and increase the hardness of the metal. The purpose of this