When working with metal, a grinder is often used. And its effectiveness directly depends on the circle that is used. So how to choose a cutting disc for metal to get the best quality? As examples, circles with the most popular “household” diameter of 125 mm will be compared.
Choose a thickness
It should be noted that when it comes to cutting discs for metal, dimensions play an important role. So, too large a circle diameter will not allow its use in a grinder. But there is another parameter that is responsible for the comfort of work, this is the thickness. The simplest and most effective cutting planes are usually 1 and 1.2 mm discs. And they are popular. But why so? The fact is that thin discs are more resilient than their “thick” counterparts. Due to the possibility of a small bend, minor operator errors and shaft runout are leveled. Also, when a disk ruptures (which is quite difficult to achieve), the mass and kinetic energy of flying fragments will be relatively small. In addition, due to the complexity of their production, the probability of encountering a fake from China is very small. Therefore, cutting discs for metal 125 mm with a thickness of 1 mm were chosen as an object, as they are popular in everyday life and difficult to fake.
Test results
But a decision to choose a specific model can only be made by comparing their effectiveness in practice. Therefore, I bring to your attention the results of experiments where several popular representatives will be considered. The test task was the cutting of steel bars in the amount of 50 pieces with a diameter of 10 millimeters. For uniformity of testing, the PoggiPosqualino machine was used. Acceleration to 150 m / s was also carried out (with the declared indicator of 80 meters) in order to check the tensile strength on a device of the same company.
Hitachi powertools
It is produced by the Luga Abrasive Plant, but is considered the partner products of Japan. They are marked without violating the rules indicating the purpose of the disk and its compliance with GOST. According to the test results, it was found that its diameter decreased by 8 millimeters, and the efficiency ratio was 5.75. Also, this disk has successfully passed speed testing. According to the final result, we can say that the effectiveness of this circle is the highest among the options considered in the article, and in terms of quality / price it takes an honorable second place. Also, I didn’t hear that this metal cutting disc was faked, so for certainty you can buy this particular product unit.
Luga abrasiv extra
Also products of the Luga abrasive plant. Moreover, it is one of the most recognizable brands even on a global scale. In terms of cutting efficiency, this representative is inferior to the previous one, but due to the low price he can be awarded first place in the overall standings. They also passed the speed test. But it should be noted that many people notice when using fast erasure and various side effects. But this is not true for all products, despite the fact that official products pass all tests. Also noted is the speed of work and, accordingly, the wear of the circle. Therefore, there are suggestions that these discs, despite their cheapness, China still learned to fake.
KronenflexA 60 Extra
Often, this model is called the favorite price / quality ratio. But, according to some information, this is not true. As a result of testing in diameter, the disk lost 13 millimeters. The final efficiency ratio is 2.35. At speeds greater than 120 m / s, this model is not recommended.
Interskol
It is a product of the Chinese company of the same name. According to the test results, the final disk diameter decreased by 16 millimeters. It should be noted the absence of safety markings and compliance with GOST, the necessary designations and the date of manufacture. True, there is an old Soviet marking, which, however, is not true. Also, the number of revolutions per minute is 50 units less than what is required by the standards. Despite a number of suspicious moments, the disk successfully passed testing for speed increase. But the overall efficiency ratio was a little more than two. Despite the lack of heights in the characteristic, we can say that the wear is low and the cut is even.
BISON "Expert"
After testing, the diameter of the disc decreased by 17 millimeters, and the coefficient of efficiency of the cut was 1.81. During a test of its properties, it turned out that the circle cuts relatively poorly into the metal. You can also observe the excess thickness of 1.5 times the specified size. Also, compliance with GOST and the manufacturer are not indicated. But the speed test, despite a number of complaints, this metal cutting disc was very successful.
Rhodius ALPHA line
After use, the diameter of the disc decreased by 19 millimeters. Initially, these German products make a positive impression: there are no complaints about labeling, the instance itself feels like high-quality products. But, as practice has shown, it has significant wear and tear. Compliance with GOST and a successful speed check allow us to give positive feedback, but the high price still makes it possible to put a rather low overall coefficient of utility - 1.61. Therefore, despite the high-quality cut, the use of this disk is quite inefficient.
Conclusion
There are still quite a lot of products on the Russian market, however, mainly of Chinese origin (it is often labeled as goods of European origin), which showed not very high quality. One of the circles - Orientcraft Professional could even wear out after the 41st steel bar. But in the end, which is better to choose a cutting disc for metal, focusing on price / quality, you still need to choose. And the task of this article is to provide information on the basis of which conclusions will be drawn about which unit of production still needs to be made.