1 Scope of application
1.1 This standard applies to all types of ordinary bearings in the range of 28 to 430 mm outside diameter.
1.2 Bearing residual magnetism is a nonlinear non-uniform magnetic field, and its measured value is related to the measurement principle used, the sensing element and its measuring distance. Therefore, the residual magnetic value specified in this standard refers to the value measured under the conditions specified in 5.1. The residual magnetic value measured under other parameters is not applicable to this standard.
2 Reference standard
GB 3102.5-82 "Electrical and magnetic quantities and units"
JB 3371-83 "Rules for Inspection of Rolling Bearings and Commodity Parts"
3 definition and unit of measure
3.1 Residual magnetism refers to the maximum residual magnetism that has been magnetized during the production process and has not been eliminated after demagnetization.
3.2 Residual magnetism is expressed by the physical quantity of magnetic induction, and its unit is milliwatt (mT).
4 Technical requirements
5 Measurement methods
5.1 Residual magnetic measurement Using the Hall effect principle, the measuring instrument must have a range of 1 mT and an accuracy of plus or minus 3%. The Hall component of the instrument is 4*2*0.2 cubic meters, and the distance between the plane of the Hall element and the measured surface is plus or minus 0.05mm.
5.2 For radial ball bearings, the measuring parts are both end faces and chamfers. The maximum reading obtained is the residual value of the bearing when measuring.
5.3 For cylindrical roller bearings, needle roller bearings, spiral roller bearings, tapered roller bearings and thrust roller bearings, the separable parts shall be separated and measured separately. In addition to the end faces and chamfers of the inner and outer rings (or seats, shaft rings), the exposed parts of the rolling elements should be measured. If the residual magnetic parts of the rolling elements are found at the junction with the cage, the rolling elements can be rotated appropriately. The portion was exposed and measured. For the measurement method of the inseparable type of this type of bearing, the provisions of 5.2.
5.4 For spherical roller bearings, when measuring both end faces and chamfers, refer to the provisions of 5.2. When measuring the rolling elements, the radial planes of the inner and outer rings should be made 90 degrees apart from each other. The measurement method of the rolling elements is as specified in 5.3 for the measurement of rolling elements.
5.5 For thrust ball bearings, the separable washers shall be measured after separation. The measuring parts shall be the seat, the end face of the shaft ring and the chamfer. For the measurement method of the inseparable type of this type of bearing, the provisions of 5.2.
5.6 When measuring the residual magnetism of the bearing end face, the probe is perpendicular to the bearing end face position. When measuring the chamfer of the bearing and the residual magnetism of the rolling element, the probe can be tilted for proper recording, but the inclination angle is not more than 45 degrees.
5.7 When the residual magnetism on the bearing ring or rolling element is close to the specified value, the bearing end face should be placed in a flat position, and then the treatment should be measured in the east-west direction to reduce the influence of the geomagnetic field.
5.8 It is not allowed to measure on a magnetically conductive table and in an ambient magnetic field greater than the strength of the earth's magnetic field.
5.9 The distribution of residual magnetism on the bearing is random. When measuring, the measuring position of the probe on the bearing cannot be preset. The probe should be moved in such a way that it can reach any part of the bearing. The measurement method of the fixed probe is not applicable to this standard.
6 Inspection rules
The residual magnetic inspection adopts the method of sampling acceptance. The number of samples is taken according to the provisions of JB3371, and the acceptable quality level AQL is 4, and the general inspection level is sampled.
2018年11月30日星期五
2018年11月28日星期三
2018年11月26日星期一
Patent Overview of Aluminum Alloy Materials for Bearings
Bearings are widely used in various equipment such as internal combustion engines, railway locomotives, and cutting machine tools. Aluminum alloy is one of the most commonly used bearing materials. This paper takes aluminum alloy bearing materials as the analysis object, and focuses on the application information, core patents and important applicants for aluminum alloys for sliding bearings in the world and in China.
Bearings are widely used in various equipment such as internal combustion engines, railway locomotives, and cutting machine tools. Among them, the part supporting the shaft is called a journal, and the part matching the journal is called a bearing bush. The friction reducing material cast on the inner surface thereof to improve the friction property of the bearing surface is called a bearing lining. The material of the bearing bush and bearing bushing is collectively referred to as the plain bearing material [1]. The manufacture and research of bearing materials began in 1839, when the British Isaac Babbitt obtained the first patent for tin-based alloy bearing materials. In the following 100 years, the research on bearing materials has advanced by leaps and bounds. The development and progress have achieved great results.
In general, commonly used bearing materials can be roughly divided into three categories: metal materials, porous metal materials, and non-metal materials. Among them, metal materials mainly include babbitt alloy, copper alloy, lead alloy, aluminum alloy, etc. [1]. Aluminum alloy has good mechanical properties, thermal conductivity and good corrosion resistance, and is rich in resources and low in price. It is one of the most widely used bearing materials. This paper takes aluminum alloy bearing materials as the analysis object, and focuses on the analysis of patent application information and important applicants for aluminum alloy bearing materials in the world and China.
1. Overview of aluminum alloy bearing materials
The research, development and use of aluminum alloy bearing materials began in Germany and was mainly used in some military equipment. Later, the United Kingdom, the United States, Japan and other countries also carried out research on aluminum alloy bearing materials. Aluminum-based bearing alloys are mainly developed along two paths: the first is a hard high melting point component on an aluminum matrix and the second is a soft low melting point component in an aluminum matrix. Among the common hard components are: copper (Cu), silicon (Si), nickel (Ni), etc., soft components are: tin (Sn), lead (Pb), etc. [2].
Bearings are widely used in various equipment such as internal combustion engines, railway locomotives, and cutting machine tools. Among them, the part supporting the shaft is called a journal, and the part matching the journal is called a bearing bush. The friction reducing material cast on the inner surface thereof to improve the friction property of the bearing surface is called a bearing lining. The material of the bearing bush and bearing bushing is collectively referred to as the plain bearing material [1]. The manufacture and research of bearing materials began in 1839, when the British Isaac Babbitt obtained the first patent for tin-based alloy bearing materials. In the following 100 years, the research on bearing materials has advanced by leaps and bounds. The development and progress have achieved great results.
In general, commonly used bearing materials can be roughly divided into three categories: metal materials, porous metal materials, and non-metal materials. Among them, metal materials mainly include babbitt alloy, copper alloy, lead alloy, aluminum alloy, etc. [1]. Aluminum alloy has good mechanical properties, thermal conductivity and good corrosion resistance, and is rich in resources and low in price. It is one of the most widely used bearing materials. This paper takes aluminum alloy bearing materials as the analysis object, and focuses on the analysis of patent application information and important applicants for aluminum alloy bearing materials in the world and China.
1. Overview of aluminum alloy bearing materials
The research, development and use of aluminum alloy bearing materials began in Germany and was mainly used in some military equipment. Later, the United Kingdom, the United States, Japan and other countries also carried out research on aluminum alloy bearing materials. Aluminum-based bearing alloys are mainly developed along two paths: the first is a hard high melting point component on an aluminum matrix and the second is a soft low melting point component in an aluminum matrix. Among the common hard components are: copper (Cu), silicon (Si), nickel (Ni), etc., soft components are: tin (Sn), lead (Pb), etc. [2].
2018年11月2日星期五
Tapered Roller Bearings 3600/2600/315/LM72800/L44600/15000 series
Tapered Roller Bearings 3600/2600/315/LM72800/L44600/15000 series
Email:sales@bearingkingdom.com
3655 - 3620
|
3600
|
22.225 mm0.8750 in
|
61.913 mm2.4375 in
|
38.354 mm1.5100 in
|
23.813 mm0.9375 in
|
36.513 mm1.4375 in
|
19900 lbf88600 N
|
20200 lbf89800 N
|
2684 - 2620
|
2600
|
22.225 mm0.8750 in
|
63.101 mm2.4843 in
|
25.433 mm1.0013 in
|
19.050 mm0.7500 in
|
23.818 mm0.9377 in
|
17200 lbf76600 N
|
18400 lbf81700 N
|
2684 - 2630
|
2600
|
22.225 mm0.8750 in
|
63.101 mm2.4843 in
|
25.433 mm1.0013 in
|
19.050 mm0.7500 in
|
23.818 mm0.9377 in
|
17200 lbf76600 N
|
18400 lbf81700 N
|
2684 - 2631
|
2600
|
22.225 mm0.8750 in
|
66.421 mm2.6150 in
|
25.433 mm1.0013 in
|
19.050 mm0.7500 in
|
23.813 mm0.9375 in
|
17200 lbf76600 N
|
18400 lbf81700 N
|
320 - 313
|
315
|
22.225 mm0.8750 in
|
71.999 mm2.8346 in
|
22.174 mm0.8730 in
|
18.999 mm0.7480 in
|
19.002 mm0.7481 in
|
16800 lbf74900 N
|
16800 lbf74800 N
|
320 - 312
|
315
|
22.225 mm0.8750 in
|
72.626 mm2.8593 in
|
22.174 mm0.8730 in
|
23.813 mm0.9375 in
|
26.993 mm1.0627 in
|
16800 lbf74900 N
|
16800 lbf74800 N
|
LM72849 - LM72810
|
LM72800
|
22.606 mm0.8900 in
|
47.000 mm1.8504 in
|
15.499 mm0.6102 in
|
11.999 mm0.4724 in
|
15.499 mm0.6102 in
|
7900 lbf35100 N
|
7420 lbf33000 N
|
07093 - 07196
|
07000
|
23.813 mm0.9375 in
|
50.005 mm1.9687 in
|
14.260 mm0.5614 in
|
9.525 mm0.3750 in
|
13.495 mm0.5313 in
|
6540 lbf29100 N
|
6650 lbf29600 N
|
L44640 - L44610
|
L44600
|
23.813 mm0.9375 in
|
50.292 mm1.9800 in
|
14.732 mm0.5800 in
|
10.668 mm0.4200 in
|
14.224 mm0.5600 in
|
8010 lbf35600 N
|
7400 lbf32900 N
|
07093 - 07210X
|
07000
|
23.813 mm0.9375 in
|
50.8 mm2 in
|
14.260 mm0.5614 in
|
12.700 mm0.5000 in
|
15.011 mm0.5910 in
|
6540 lbf29100 N
|
6650 lbf29600 N
|
07093 - 07205X
|
07000
|
23.813 mm0.9375 in
|
51.986 mm2.0467 in
|
14.260 mm0.5614 in
|
13.000 mm0.5118 in
|
16.251 mm0.6398 in
|
6540 lbf29100 N
|
6650 lbf29600 N
|
L44640 - L44613
|
L44600
|
23.813 mm0.9375 in
|
51.986 mm2.0467 in
|
14.732 mm0.5800 in
|
12.700 mm0.5000 in
|
15.011 mm0.5910 in
|
8010 lbf35600 N
|
7400 lbf32900 N
|
07093 - 07204
|
07000
|
23.813 mm0.9375 in
|
51.994 mm2.0470 in
|
14.260 mm0.5614 in
|
12.700 mm0.5000 in
|
15.011 mm0.5910 in
|
6540 lbf29100 N
|
6650 lbf29600 N
|
07093 - 07205
|
07000
|
23.813 mm0.9375 in
|
51.999 mm2.0472 in
|
14.260 mm0.5614 in
|
12.700 mm0.5000 in
|
15.011 mm0.5910 in
|
6540 lbf29100 N
|
6650 lbf29600 N
|
1751 - 1730
|
1700
|
23.813 mm0.9375 in
|
53.975 mm2.1250 in
|
24.282 mm0.9560 in
|
15.875 mm0.6250 in
|
23.813 mm0.9375 in
|
10200 lbf45400 N
|
10200 lbf45300 N
|
1779 - 1730
|
1700
|
23.813 mm0.9375 in
|
53.975 mm2.1250 in
|
19.837 mm0.7810 in
|
15.875 mm0.6250 in
|
19.368 mm0.7625 in
|
10200 lbf45400 N
|
10200 lbf45300 N
|
1779 - 1729
|
1700
|
23.813 mm0.9375 in
|
56.896 mm2.2400 in
|
19.837 mm0.7810 in
|
15.875 mm0.6250 in
|
19.368 mm0.7625 in
|
10200 lbf45400 N
|
10200 lbf45300 N
|
1751 - 1729
|
1700
|
23.813 mm0.9375 in
|
56.896 mm2.2400 in
|
24.282 mm0.9560 in
|
15.875 mm0.6250 in
|
23.813 mm0.9375 in
|
10200 lbf45400 N
|
10200 lbf45300 N
|
1779 - 1729X
|
1700
|
23.813 mm0.9375 in
|
56.896 mm2.2400 in
|
19.837 mm0.7810 in
|
15.875 mm0.6250 in
|
19.368 mm0.7625 in
|
10200 lbf45400 N
|
10200 lbf45300 N
|
1751 - 1729X
|
1700
|
23.813 mm0.9375 in
|
56.896 mm2.2400 in
|
24.282 mm0.9560 in
|
15.875 mm0.6250 in
|
23.813 mm0.9375 in
|
10200 lbf45400 N
|
10200 lbf45300 N
|
2381 - 2320
|
2300
|
23.813 mm0.9375 in
|
56.896 mm2.2400 in
|
24.765 mm0.9750 in
|
20.638 mm0.8125 in
|
23.818 mm0.9377 in
|
14300 lbf63700 N
|
13900 lbf62000 N
|
2381 - 2330
|
2300
|
23.813 mm0.9375 in
|
56.896 mm2.2400 in
|
24.765 mm0.9750 in
|
20.638 mm0.8125 in
|
23.818 mm0.9377 in
|
14300 lbf63700 N
|
13900 lbf62000 N
|
15574A - 15520
|
15500
|
23.813 mm0.9375 in
|
57.150 mm2.2500 in
|
18.654 mm0.7344 in
|
13.495 mm0.5313 in
|
18.656 mm0.7345 in
|
10300 lbf46000 N
|
11300 lbf50100 N
|
15574A - 15520RB
|
15500
|
23.813 mm0.9375 in
|
57.150 mm2.2500 in
|
18.654 mm0.7344 in
|
13.495 mm0.5313 in
|
18.656 mm0.7345 in
|
10300 lbf46000 N
|
11300 lbf50100 N
|
1751 - 1738X
|
1700
|
23.813 mm0.9375 in
|
57.150 mm2.2500 in
|
24.282 mm0.9560 in
|
17.551 mm0.6910 in
|
24.666 mm0.9711 in
|
10200 lbf45400 N
|
10200 lbf45300 N
|
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