Release time : 2015-06-10 12:24:09
By Bearing Manufacturer>Bearing News>How do you determine standard ball bearing sizes?
In general machinery applications,the standard ball bearing sizes for a given bearing arrangement is determined by the load carrying capacity. The selection of bearing sizes is made not only in relation to the actual load, but also to the desired life and operational reliability.
The standard ball bearing sizes should be selected on the basis of static load ratings.
The permissible load for a bearing is determined by the amount of major deformation to the raceway caused by the load. Loads operating on slow oscillating bearing or a stationary bearing or on rotating bearing can produce flat areas on the rolling elements and indentations in the raceways. If the load operates for a number of times, the deformation will increase and will be evenly spread over the whole raceway, which can lead to vibration in the standard bearing, noise and increased friction. As a result the standard ball bearing sizes need to be carefully chosen.
The following section gives a brief idea on various bearing standards, worldwide bearing standard, bearing codes, ball bearing standards.
You can learn a lot about a bearing just from its part number. Deep Groove Ball Bearings is the 6203ZZ bearing. This can be divided into its components:
standard ball bearing sizes:
6 = Type Code
2 = Series
03 = Bore
ZZ = Suffix
The method is followed universally
For the Type Codes
1 Self-aligning ball bearing
2 Wide self-aligning ball bearing
22 Self-aligning roller bearing
23 Wide self-aligning roller bearing
3 Double-row angular contact ball bearing
4 Double-row ball bearing
5 Thrust ball bearing
6 Single-row deep groove ball bearing
16 Thin section single-row deep groove ball bearing
7 Single-row angular contact bearing.
For an inch bearing, the first digit is R.
R Inch (non-metric) bearing.
Series identify the lightness or the heaviness
7 Not sure
8 Extra thin section
9 Very thin section
0 Extra light
1 Extra light thrust
The bore sizes in mm of Ball Miniature Bearings
Except for 0 through 3, the bore size is simply five times the third and fourth digits together. 0 through 3, however, are different.
The Last Suffix is the High Speed Bearings Speciality
Z Single shielded
ZZ Double shielded
RS Single sealed
2RS Double sealed
V Single non-contact seal
VV Double non-contact seal
DDU Double contact seals
NR Snap ring and groove
M Brass cage.