What are the precautions for purchase of bearing?

Bearing is the key component of the machine, if you use the bearing quality closes nevertheless, not only can wear machine equipment, more will affect the productivity level of the enterprise, which directly affect the economic interests. Using personnel from different manufacturers, many of the bearing products, choose the appropriate type, the following will introduce you to buy bearing by the author. A, and the choice of bearing step 1. According to the bearing working conditions ( Including the type of load direction and load, speed, lubrication way and the orientation of coaxial degree requirements, or not, installation and maintenance, environment temperature, etc. ) , the choice of basic type, tolerance grade, and bearing clearance. Choose when to withstand a load thrust thrust bearings, angular contact bearings for high speed applications typically use ball bearings, under heavy radial load, using roller bearing. 2. According to the working conditions of the bearing and force situation and life requirements, through the calculate and determine the bearing type, or according to the demands of the selected bearing model, calculating the life again; 3. Calculation of the selected bearing load rating and extreme speed. Choose bearing limit rotational speed is the main factor, dacron life and load capacity, other factors help determine bearing type, structure, size and tolerance grade and clearance for the final solution. Note 1 second, buy bearing, bearing type all kinds of rolling bearing with different characteristics, suitable for different usage of various kinds of machinery. Usually the following factors should be considered when choosing a bearing type. : generally choose when to withstand a load thrust thrust bearings, angular contact bearings for high speed applications typically use ball bearings, under heavy radial load, using roller bearing. In a word, using personnel from different manufacturers, many of the bearing products, choose the appropriate type. 2, the most important factor in the bearing is bearing load load. Roller bearing is used to carry heavy load, the ball bearing used in light or medium under load, carburizing steel bearing manufacturing or bainite hardening, can withstand the shock and vibration load. In the direction of the load, under pure radial load, can choose deep groove ball bearings, cylindrical roller bearing or needle roller bearing. Small pure axial load, can choose the thrust ball bearings; Under high pure axial load, can choose thrust roller bearings. When load bearing radial and axial, angular contact ball bearing is generally selected or tapered roller bearing. 3 rigid bearing, bearing rigidity, refers to the size of bearing force needed to generate unit deformation. The elastic deformation of rolling bearings is small, can need not consider in most mechanical, but in some machinery, such as spindle, bearing rigidity is an important factor, generally should choose the cylindrical and conical roller bearing. Because of these two kinds of bearing under the load, the rolling element and raceway belongs to the point contact, poor rigidity. In addition, all kinds of bearing can also through the preloaded, achieve the goal of increasing bearing rigidity. Such as angular contact ball bearings and tapered roller bearings, to prevent the vibration of the shaft, increase the bearing stiffness, often impose certain axial force in advance when installation, make its mutual pressure. Noted here that the amount is too large. Is too large, will make bearing friction increases, higher temperature rise, affect the service life of the bearing. 4 when choosing bearing type, installation and removal, whether bearing installation disassembly convenient, also must be thoughtful, especially for large and super large bearing installation and removal is particularly important. Generally the outer ring of separable angular contact ball bearings, tapered roller bearings, cylindrical roller bearings and needle roller bearing, easy installation and remove the comparison, their inner ring and outer ring can be installed on the shaft or shell hole respectively. In addition, the inner diameter with cone hole, with a set set of spherical roller bearings, double row cylindrical roller bearings, self-aligning ball bearings, also relatively easy to remove the installation. Attention that is about to buy bearing is introduced, in addition to the above factors, also should consider working environment temperature, bearing seal and bearing of friction torque, vibration, noise and other special requirements. Bearing is the soul of the machinery, small bearing play an important role in the mechanical processing, buying bearings need to choose a professional manufacturer, jiaxing bearing has nearly 20 years of spindle bearing manufacturing experience and excellent pre-market after-sales team, quick response and solve your problem of technology research and development team, to provide free technical guidance for you, welcome to leave a message or call advisory. Tags: buy bearing matters needing attention