Supplier Bearing TDO HM926747/10D/XA From Bearing Kingdom Group

 TDO HM926747/10D/XA 127.792×228.6×115.888 16.2KG

TDO 152,4 -99600/102CD/X7S 152.4*254*149.225 26.93KG

NU 2326 EMC3 130×280×93 28.5KG

NU 1060ECMA/C3 300×460×74 44.5KG

TDO HM 926747/10D/XA 127.792×228.6×115.888 16.200 

TDO 152,4 -99600/102CD/X7S 152.4*254*149.225 26.930 

NU 2326 EMC3 130×280×93 28.500 

NU 1060ECMA/C3 300×460×74 44.500 

7307A 35×80×21 0.47

7207C 35×72×17 0.3

22320CAME4 100×215×73 13.1

NU2224EM 120×215×58 9.5

HR130KBE2301+L 130*230*64 11.4

23024EAE4 120×150×46 4.2

23128CAME4 140×225×68 10.8

QJ308MA 40*90*23 0.78

C2238 190*340*92 34

33211/Q    55*120*45.5 2.3KG

UC205 25×52×34.1×17 0.21KG

P205 25×140×71×34.1 0.8KG

6312-2RS 60×130×31 1.700 

5313G 65×140×58.7 4.100 

318-SS

NU 319 95×200×45 6.740 

6208-2Z 40×80×18 0.420 

6004Z 20×42×12 0.070 

6201Z JAPAN JAPAN

6200Z 10×30×9 0.030 

6202-2Z 15×35×11 0.045 

6318 90×190×43 4.920 

3318 90*190*73 9.250 

N218E.M1 90*160*30 2.400 

34306 / 34500 77.788*121.442*24.608 0.910 

HM 813844 + HM 66.675*127*36.512 2.420 

40BNR10XTDBBCA20P4Y 40*68*36 0.480 

7010CE/HCP4AQBCA 50×80×16 0.260 

7009CE/HCP4ADBA 45×75×32 0.480 

NN3008KTNHA/SPC1LVU111 40×68×21 0.310 

HCS7010C.T.P4S.UL (FAG brand) 50×80×16 0.260 

1- NNU-4930-B-SP-C3-W33 - SKF = 08pcs; 150*210*60 6.250 

2- NNU-4952-B/SP/C3-W33 - SKF = 08 pcs; 260×360×100 30.500 

3- 71930 ACD-P4A-DBA - FAG = 04pcs; 150×210×56 5.100 

4- 7044 ACD-P4 DBA - FAG  = 04pcs; 220*340*112 32.000 

 7019CD/P4ADBB           2    SET 95×145×48 2.400 

 7215CD/P4ADBB           1    SET 75×130×50 3.360 

 71926ACD/P4ADBA         2    SET 130×180×24 3.100 

 BSA206CE                2    PCS 30*62*16 0.230 

 NKXR40                    1  PC 40*52*32 0.214 

 ZARN3062TN                1  PC 30*62*65 0.750 

 7018A5TYNSUMP4            2  PC 90×140×24 1.430 

Bearing Kingdom Group has more than 1,000,000 bearing products from the world's most trusted bearing brands, including SKF, FAG, Timken, RHP, NSK, INA, NTN, NACHI, NMB, KOYO, THK, and IKO.

Macroscopic appearance and causes of common cracking of bearing rings

The bearing ring is one of the important parts of the bearing. During the use of the bearing, the cracking and fracture of the bearing ring is a common form of damage. Some bearings cracked in the early use of the ring, and some bearings broke due to fatigue. The following China bearing network (hereinafter referred to as: China bearing network) shares the information according to the understanding of the bearing knowledge In daily life, we often see some macroscopic appearance of bearing ring cracking, and analyze the real cause of cracking.

1. Macroscopic appearance and causes of outer ring cracking of deep groove ball bearing

As shown in Figure 1 below, the macro morphology of bearing fracture shows that the outer ring of the bearing is fractured, and the section is basically perpendicular to the surface. As indicated by the arrow in Figure 1, the section starts from the lower surface of the outer inner diameter on the right side of the raceway in the figure, and rapidly expands to the fracture on the outer surface and to the left side. There is no obvious plastic deformation on the fracture surface of the bearing outer ring, showing brittle fracture characteristics,

After analysis, the protective atmosphere in the heat treatment furnace is a mixture of various gases, including oxidizing gas, neutral gas, reducing gas and carburizing gas. When heated at high temperature, the chemical reaction is very complex, whether it is decarburization or carburization, except for the participation of free oxygen atoms, it can reach equilibrium under certain conditions, even reversible reaction. The carbon potential in the furnace has great influence on the thickness of carburized layer, carbon content and carbon concentration gradient.

Generally speaking, the higher the carbon potential in the furnace, the steeper the carbon concentration gradient, and the greater the tendency of forming coarse and network carbides. In order to avoid the phenomenon of Carburization on the surface of bearing rings caused by high carbon potential, it is necessary to adopt appropriate heating temperature to prevent the grain growth of the steel. The heating parameters such as heating medium, heating speed, heating temperature and holding time should be selected and designed correctly, and the uniformity of furnace temperature should be strictly controlled without excessive fluctuation. By controlling the carbon potential in the furnace, the carbon concentration and concentration gradient of the bearing rings are strictly controlled, so as to ensure the heat treatment quality and service life of the rings.