Rolling bearing identification method

Core Tips: (1) Identification of radial ball bearings For normal radial ball bearings, the inner and outer ring raceways should be free of flaking and severe wear marks, and a bright circular groove; all balls
(1) Identification of radial ball bearings
For a radial ball bearing with normal technical state, the inner and outer ring raceways shall be free of flaking and severe wear marks, and shall be a bright circular groove; all balls shall be kept circular, with no spots, cracks and peeling on the surface; The cage is not loose, not broken, and not worn. When using a hand-held inner ring and the other hand quickly pushes the outer ring to rotate, it is required to rotate smoothly. Only the slight sound of the ball rolling on the raceway is heard, no vibration; when stopping, it should be gradually decelerated, and there is no backward phenomenon after stopping. The normal centripetal ball bearing has a gap between the inner and outer rings and the rolling elements of 0.005-0.010 mm. When the inner and outer rings are swayed in the radial direction, no gap should be felt. The used bearing can be held by hand with the inner ring swaying a few times in the axial direction. When the outer ring and the ball have obvious sound, the matching clearance exceeds 0.03mm and should not be used any more.
(2) Identification of tapered roller bearings
After the bearing is used, check whether the rolling element and the inner ring raceway are peeled off, whether the retaining frame is too loose, whether the front and rear edges of the inner ring are intact, and whether the outer ring raceway has cracks. After the inner ring and roller assembly are loaded into the outer ring, the roller should fall into the middle of the raceway, and the forward displacement should not exceed 1.5 mm. One of them is unqualified, that is, it cannot be used.
(3) Identification of spherical roller bearings and short cylindrical roller bearings
The outer ring of this type of bearing is separable. In the normal state, the inner and outer ring raceways and rollers should be free of breakage, pitting and deep wear marks; the cage should be free of deformation and can gather the rollers on the inner ring; the inner and outer ring raceways and rolls The matching clearance of the child should not exceed 0.06 mm.
(4) Identification of thrust ball bearings
In the normal state, the two raceways should be free of flaking and severe wear, the balls should be free of breakage and pitting; the cage should be free of deformation, not touching the two raceway washers, and the balls are firmly gathered together.https://www.supplyforever.com/

How to buy agricultural machinery bearings

Core Tip: The bearing is a support for various mechanical rotating shafts or movable parts. It is widely used in agricultural machinery such as agricultural vehicles, tractors, diesel engines, electric motors, and threshers. Optional bearing common shaft
The bearing is a support for various mechanical rotating shafts or movable parts, and is widely used in agricultural machinery such as agricultural vehicles, tractors, diesel engines, electric motors, and threshers. The bearing code is commonly used to purchase bearings, but the bearing code is more complicated. If the agricultural machine masters the rules of identifying the bearing code, it is easy to purchase.
Commonly used bearings are some standard models, codenamed “0”, tolerance class is “G” (normal grade), the first section of the general bearing can not be written, so its code number is mostly represented by 7 digits of the basic code. Now give an example to illustrate the meaning of the bearing code: Example 7002136 (135 series diesel engine shaft main bearing), the basic code is identified from right to left. The "36" two-digit number means light inside, and the calculation method is 36×5=180 mm; “1” means the diameter series is extremely light; “2” means the type is cylindrical roller bearing; “00” means the bearing structure form outer ring. No ribs; "7" means the width series is narrow. If the operator buys 7-digit other standard model bearing code, it can be deduced.
The bearing is multi-reference bearing inner diameter. The inner diameter of the bearing is indicated by the first and second digits in the right code in the basic code. The inner diameter of the bearing is divided into a standard and a non-standard inner diameter, and the difference between the non-standard inner diameter is not an integer or an integral multiple of 5. In order to facilitate the purchase of the machine, an example is given here: 1 The inner diameter of the bearing below 9 mm is expressed by the actual size of the first digit on the right end. For example, bearing number 18 has an inner diameter of 8 mm. 2 bearing inner diameter is expressed in fixed numbers of 10-17 mm. For example, bearing numbers 100, 201, 302, and 403 have inner diameter codes of 00, 01, 02, and 03, respectively, and their inner diameters are fixed numbers of 10, 12, 15, and 17 mm, respectively. 3 bearing inner diameter is 20-480 mm (except 22, 28, 32), expressed as the number of inner diameter divided by 5. 4 bearing inner diameter is more than 500 mm (22, 28, 32) expressed in fractions, denominator indicates inner diameter, and numerator indicates bearing size series, type and structural form. For example, bearing 30031/560 has an inner diameter of 560 mm, and so on.https://www.supplyforever.com/