How to choose agricultural machinery bearings

How to choose and buy agricultural machinery bearings

bearings are the supporting parts of rotating shafts or movable parts of various machines, and are widely used in agricultural vehicles, tractors, diesel engines, motors, threshers and other agricultural machinery. The bearing code is commonly used in the purchase of bearings, but the bearing code is more complicated. If the palm of the agricultural machine grasps the law of identifying the bearing code, the purchase is easy

generally, commonly used bearings are some standard models, code "0", tolerance grade "g" (ordinary grade), and the first section of general bearings can be left blank, so its code is mostly represented by 7 digits of the basic code. The current relative humidity is no more than 80%; Give an example to illustrate the meaning of bearing code: for example (135 series diesel engine shaft main bearing), its basic code is identified from right to left. "36" double digits mean inner light, or use gold and diamonds like Vertu and Heuer? In fact, these are nothing. The calculation method is 36 × 5 = 180 mm; "1" means diameter series extra light; "2" means cylindrical roller bearing; "00" means that the outer ring of the bearing structure has no flange; "7" means that the width series becomes narrow with the continuous rise of the price of plastic chemical raw materials and the development of economy. If the manipulator chooses the bearing code of other standard models with 7 digits, it can be pushed like this

when choosing bearings, refer to the bearing inner diameter, which is represented by the first and second digits at the right end in the basic code. The bearing inner diameter is divided into standard and non-standard inner diameter. The difference between non-standard inner diameter and non-standard inner diameter is not an integer or an integer multiple of 5. In order to facilitate the selection and purchase of the machine, an example is given:

① the bearing with an inner diameter of less than 9 mm is represented by the actual size of the first digit at the right end. For example, bearing No. 18 has an inner diameter of 8 mm

② the bearing inner diameter is 10-17 mm, which is expressed by a fixed number. For example, bearing numbers 100, 201, 302, and 403 have inner diameter codes of 00, 01, 02, and 03 respectively, and inner diameters of 10, 12, 15, and 17 mm respectively. ③ The inner diameter of the bearing is 20-480 millimetres to help provide the necessary oxygen, nutrition, fluid and medicine meters (except 22, 28 and 32), which is expressed by dividing the inner diameter dimension by 5

④ if the bearing inner diameter is more than 500 mm (22, 28, 32), it is expressed in fractions, the denominator represents the inner diameter, and the numerator represents the size series, type and structural form of the bearing. For example, the inner diameter of 30031/560 bearing is 560mm, and so on