How to choose and buy of agricultural machinery bearing - bearing knowledge

Of rotation of the bearing is a variety of mechanical or moving parts of the bearing parts, widely used in agricultural vehicles, tractors, diesel engine, motor, threshing agricultural machinery, etc. Bearing bearing commonly used code of choose and buy, but bearing code is more complex, if NongJiShou master the regular pattern of identifying bearing code, the choose and buy is easy. Commonly used bearings are standard models, code-named '0', the tolerance level for 'G' ( Regular grade) General bearing, the first paragraph can not write, so its code to the basic code of 7 digits. Now illustrate the meaning of the bearing code: 7002136, 135 series diesel engine main bearing shaft) The basic code to identify from right to left. Light in the '36' two digits, the calculation method for 36 * 5 = 180 mm; '1' diameter series, light; '2' said type cylindrical roller bearing; '00' said bearing structure form of outer ring without guard; '7' for the narrow width of the series. If the machinist seven figures of choose and buy other standards can type bearing and so on. Bearing much reference bearing inside diameter of choose and buy, bearing inside diameter in the basic code with the right end of the first and second digits. Standard and non-standard bearing inside diameter points inside diameter, the difference of non-standard diameter isn't an integer or a multiple of 5. For the convenience of machinist of choose and buy, we illustrate: (1) bearing inside diameter under 9 mm with the right end of the first digits said actual size. Bearing no. 18, for example, its diameter is 8 mm. (2) the bearing inner diameter in 10 - 17 mm in destiny. Such as bearing no. 100, 201, 302, 403, its inner code right end respectively two digits is 00, 01, 02, 03, its inner diameter 10, 12, 15, 17 mm respectively fixed Numbers. (3) bearing inside diameter in 20 - 480 mm ( 22 except, 28, 32) Said to inside diameter size in addition to five the number. (4) bearing inside diameter in more than 500 mm ( 22, 28, 32) With that score, the denominator said inner diameter, molecular said the size of the bearing series, the type and structure form. Bearing no. 30031/560, for example, its diameter is 560 mm, other and so on.