The product of high technology is the replacement of old equipment with new equipment. Now new equipment with high efficiency and energy saving has already replaced old equipment. Bolt roller bearing manufacturers have also invested a lot of money for this. In order to be able to use these equipments for a long time, it also took a lot of thought. Full complement cylindrical roller bearings are also called outer ball cylindrical roller bearings. The styles are widely adaptable and widely used in machine tools, metallurgical machinery, textile machinery and printing machinery usage of. However, there are many brands on the market that are good and bad, and many consumers can't tell the difference, so today I will teach you how to distinguish between good and bad needle roller bearings. Whether the outer packaging is clear: Under normal circumstances, regular brands have their own dedicated designers to design the outer packaging, and arrange for regular manufacturers to produce, so the packaging is very clear and unambiguous from lines to color blocks. Whether the stencil is clear: Brand words, labels, etc. will be printed on the bearing body. The font is very small, but most of the products produced by the factory use steel stamping technology, and the embossing is carried out before heat treatment, so although the font is small, the concave depth is very clear. Some of the rough fonts of counterfeit products float on the surface and can even be easily erased by hand. Whether there is any noise: Hold the bearing body sleeve with the left hand, and turn the outer sleeve with the right hand to make it rotate to see if there is any noise. Most of the counterfeit products have backward production conditions. In the production process, impurities such as sand will inevitably be mixed into the bearing body, so there will be noises when rotating. This is the biggest difference from a genuine brand that strictly enforces production standards and operates with machines. Whether the chamfer is uniform: The so-called chamfer of the bearing is the counterfeit bearing at the junction of the horizontal and vertical surfaces. Due to the limitation of production technology, the counterfeit bearing will be handled very rough. Needle roller bearings are composed of two main rollers, side rollers and shaft heads installed in different directions to reduce space and reduce manufacturing costs. The bearing capacity of the radial and axial direction device is relatively large, and the accessories are replaceable. Among them, the adjustable combined roller bearing can adjust the position of the mandrel by adjusting the eccentric outer hexagon or eccentric valve to achieve the purpose of adjusting the axial size of the side roller. Needle roller bearings are mainly used for large cranes and material lifting equipment such as racks, forklifts, stackers, metallurgical industry container front forklifts, etc. Advantages of needle roller bearings: 1. The friction coefficient of needle roller bearings is small, so the frictional resistance and starting friction torque are small, and the power consumption is low. ,Easy for installation, disassembly and maintenance; 3. The internal clearance of needle roller bearings is small, and the machining accuracy can be improved by applying preload to improve bearing rigidity, which is very important for precision machinery; 4. Needle roller bearings have high transmission efficiency and less heat generation Lubrication and maintenance are convenient to save lubricant; 5. The adaptability of load, speed and working temperature is wide. A small amount of changes in working conditions have little effect on the performance of the bearing; Compared with sliding bearings, needle roller bearings have their own advantages and disadvantages. Applicable occasions, so the two cannot be completely replaced. However, due to the outstanding advantages of needle roller bearings, needle roller bearings have developed into the main support type of machinery and are used more and more widely.
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