7300 single row angular contact ball bearing
7300 single row angular contact ball bearing
Product Details

If you are going to import 7300 bearing in stock or you want to check the price with one China 7300 bearing manufacturer, supplier and factory, please feel free to contact Weinuo Machinery.

A. Load capacities are higher than deep groove ball bearings of same dimensions
B.  Used for bearing radial-axial combined loads or pure thrust loads
C. Low operating friction and high limiting speed

1. Precision

The precision of a spindle bearing does affect the guiding properties as well as lifetime, especially with applications at max. speed.  HTH high precision bearings are manufactured to precision class 4,calss 2 and class 5 (P4, P2 and P5) as well as ABEC 7, ABEC 9 and ABEC 5. 

For special applications, e.g. vacuum pumps, gyroscopes as well as measuring engineering and optical systems, HTH manufactures bearings to the internal tolerance classes HG (high precision) and UP (ultra precision). Apart from the requirements mentioned, the tolerance classes contain additional selection criteria. The relationship between the various standards are explained below.

GB/T30794

ISO

DIN

AFBMA

C

Class 4

P4

ABEC7

B

Class 2

P2

ABEC 9

D

Class 5

P5

ABEC5

2. Contact angle 

The contact angle is formed by a straight line drawn between the points of contact of the balls with the raceways and a plane perpendicular to the bearing axis. Externally applied loads are transmitted from one ring to the other along this line. 

The contact angle is designed into the bearing and changes during operation with the speed, the external forces and the difference in temperature between the inner and the outer ring.

With increasing contact angle:

a, Limiting speed decreases

b, Radial rigidity decreases

c, Axial rigidity increases

HTH manufactures spindle bearings with 15°, 25°, 30° and 40°contact angles. Other contact angles available on request. 

3. Material 

Careful selection of material is a factor when applications require bearings to provide superior hardness and anti-corrosion or heat-resistance. So we always choose standard materials.

Chrome Steel

SpecSymbolChemical  Composition (wt%)
CSiMnPSCrMo
JISSUJ20.95~1.100.15~0.350.50 MAX0.025 MAX0.025 MAX1.30~1.60-
ASTM/AISI/SAEE521000.98~1.100.15~0.350.25~0.450.025 MAX0.025 MAX1.30~1.60-
GBGCr150.95~1.050.15~0.350.20~0.400.027 MAX0.020 MAX1.30~1.65-

5. Lubrication

lubrication.jpg

6. How  HTH to make  heat Treatment for bearings

Heat-treatments consisted of preheating samples at 843 C (1550 F) using a Sybron Thermolyne 30400 furnace, and then austenitizing samples in a Keith furnace at temperatures of 843-1215 C (1550-2220 F); immediately followed by warm high-speed oil quenching at 48.9 C (120 F). Pre-heating was done to ramp the temperature of the samples prior to austenitizing and to prevent thermal shock. 

One heat treatment per steel was carried out with cryogenic quenching at -48.9 C (-120 F) immediately after oil quenching to increase the formation of marten site. The cryogenic quench was prepared by submerging dry ice into ethanol. 

The final step was tempering, it was conducted at temperatures ranging from 135 to 537 C (275-1000 F). 

More information please contact us: tang@fycbearings.com


DimensionsBasic load ratingsLimiting speedsMassPart No.
(mm)(KN)(rpm)(kg)
dDBrs minr1s minCorCrGreaseOil(Approx.)HTH
1035110.60.310.14.9526,00034,0000.047300
12371210.611.25.2523,00030,0000.0447301
15421310.613.57.219,00026,0000.0557302
17471410.615.98.6518,00024,0000.1077303
2052151.10.618.710.416,00021,0000.1387304
2562171.10.626.415.813,00017,0000.237305
3072191.10.633.522.311,00015,0000.3457306
3580211.514026.39,80013,0000.4627307
4090231.5149338,60012,0000.6257308
45100251.5163.5447,80010,0000.8377309
50110272174527,1009,4001.097310
5512029218661.56,4008,6001.397311
60130312.11.19871.55,9007,9001.747312
65140332.11.1111825,5007,3002.117313
70150352.11.112593.55,1006,8002.567314
75160372.11.11361064,8006,3003.077315
80170392.11.11471194,5005,9003.657316
851804131.11591334,2005,6004.347317
901904331.11711474,0005,3005.067318
952004531.11831623,7005,0005.897319
1002154731.12071933,5004,7007.187320
1052254931.12202103,4004,5008.27321
1102405031.12462463,2004,3009.67322
1202605531.12462522,9003,90014.77324
1302805841.52732932,7003,60017.67326
1403006241.53003352,5003,30021.57328
1503206541.53303802,3003,10025.17330
1603406841.53454202,1002,80029.87332
1703607241.53904852,0002,70035.37334
1803807541.54105351,9002,50040.97336
19040078524305851,8002,300477338
20042080524506051,7002,20053.17340
1035110.60.39.54.622,00029,0000.0417300B
12371210.610.54.9519,00026,0000.0457301B
15421310.612.56.6517,00022,0000.0577302B
17471410.614.8815,00020,0000.1097303B
2052151.10.617.39.6513,00018,0000.1417304B
2562171.10.624.414.611,00015,0000.2347305B
3072191.10.63120.59,60013,0000.3527306B
3580211.5136.524.28,40011,0000.4697307B
4090231.514530.57,4009,9000.6367308B
45100251.5158.5406,6008,9000.8547309B
50110272168486,0008,1001.117310B
5512029217956.55,5007,3001.427311B
60130312.11.190665,1006,8001.777312B
65140332.11.1102754,7006,3002.157313B
70150352.11.1114864,4005,8002.617314B
75160372.11.112597.54,1005,4003.137315B
80170392.11.11351093,8005,1003.727316B
851804131.11461223,6004,8004.437317B
901904331.11561353,4004,5005.167318B
952004531.11671493,2004,20067319B
1002154731.11901783,0004,0007.327320B
1052254931.12021942,9003,8008.367321B
1102405031.12262262,7003,7009.87322B
1202605531.12252312,5003,30014.77324B
1302805841.52502682,3003,10017.67326B
1403006241.52753102,1002,80021.57328B
1503206541.53003502,0002,60025.17330B
1603406841.53153851,8002,40029.87332B
1703607241.53554451,7002,30035.37334B
1803807541.53754901,6002,10040.97336B
19040078523905351,5002,000477338B
20042080524105551,4001,90053.17340B


Feedback