Linear bearing much learning professional, don't understand? Answer your doubts

Linear bearing has advantages of small friction, high stability, it can apply to all mechanical, is a widely used parts. But compared to linear bearing knowledge as a professional, may be a lot of procurement staff have some knowledge of linear bearing, such as tolerance grade, how to check the technical details such as erudite and informed. The little lion will present you some linear bearing related knowledge, help you purchase or normal access to the linear bearing, more understand the product and parameter linear bearing is what ~? Linear bearing is a kind of linear motion system for straight trip, used in conjunction with cylindrical shaft. Because the coat point contact ball bearing with bearing, steel ball roll with minimum friction resistance, thus linear bearing has stable friction small, compare, do not change with bearing speed and features, can achieve high flexibility, high precision linear motion. Linear bearing also has its limitations, is the main bearing impact load ability is poor, and poor bearing can also, when the second linear bearing in high speed motion vibration and noise is bigger. The application of linear bearing is common, widely used in the tensile testing machine and digital 3 d coordinate measurement device and other fine equipment, in multi-axis machine tools, automatic punching machine, tool grinding machine, gas cutting machine, printer, card sorting machine, industrial machinery, such as food packages installed on also has a widespread application. Linear bearing tolerance grade? Linear bearing tolerance grade, that is, precision grade, ordinary into 0, 6, 6, 5, 4, 2 x, the tolerance level is from low to high. Each level of tolerance of linear bearing in size, rotation and appearance quality has different request, the higher the level, the request is more severe, the performance of the products is more and more perfect. The price of the product will have higher. （ Old tolerance grade, code-named G, E, Ex, D, C, B) 。 Existing in the linear bearing clearance is sensitive to ensure the linear bearing without some block, linear bearing request can guarantee stable operation at the same time. The precision of the linear bearing level and linear bearing clearance is not directly related. To the heart of the linear bearing radial clearance ordinary into C2, C0, C3, C4 and C5 group. Clearance of numerical range is from small to large. Theory, linear bearing each tolerance grade can choose each group of clearance, clearance group's choice but must be on the basis of detailed work conditions, using the place of temperature, load and configuration of linear bearing conditions to select, abilities to complete all the precision of the linear bearing function. Bring about THK linear bearing structure ( The west mall stores) Products such as lower precision grade, its clearance group optional larger, and the more high precision products the clearance is the less that negative clearance. Linear bearing how to register? 1, check place request bearing on ordinary warehouse, but requests are no more than 60% relative humidity in the warehouse, room temperature at 25 degrees or so, temperature difference can't be too big. And out of the best not to put acid, alkali, salt and other corrosive and chemical raw materials and moisture large objects. Check position should prevent sun point-blank, good ventilation and clean environment. 2, check way request different linear bearing products have different ways of check, the wrong way also can give an adverse effect on the bearing. Small type bearing flat on best 30 cm from the air on the shelf, large rolling bearing cannot be put in a vertical position, because the stress is not the average, invites bearing for deformation, so to the location of the deposit. 3, check before the request can be sure to check before hosting linear bearing outer packing in good condition, it is very important. If before hosting the bearing outer packing is broken, even if the register condition is very good, also can present problems, affect the quality of linear bearing. Once found not in good condition, the outer packing should be immediately.