Release time : 2015-06-10 13:02:18
By Bearing Manufacturer>Bearing News>How to Identify Ball Bearing Dimensions According To The Model And Code?
How to identify ball bearing dimensions according to the model? How to identify ball bearing dimensions according to the code? These are the most people's question. First we need to know the history of the bearing if you want to solve these problems.
The first rolling body is made of wood. Ceramics, glass also has use.Steel, copper and other metals, plastics (such as nylon, bakelite, teflon and UHMWPE) have been widely used. From the heavy duty truck axle and machine tool spindle to exact horologe parts, many occasions need rotary bearing. The most simple rotary bearing is sleeve bearing, it is just a clip in the wheel and axle between bushing.
This design is then rolling bearing replacement. The first to use rolling bearing is watchmaker John harrison. In Italy nano lake found a ship Roman ships, discovered early ball bearing. The ship built in 40 years BC. Ball bearing all sorts of immature factor, the important thing is that the ball collision between, causing additional friction. Card masson of Philip, vaughn invention Deep Groove Ball Bearings. In 1883, friedrich, Derek fisher put forward appropriate use of production machine grinding ball bearing dimensions ideas. In 1907, SKF, sven WenKuiSi design, the Needle Roller Bearings. Bearing type is by the type, size, inner diameter code named after. According to the GB/T 1993 international standard.
0, double row angular contact ball bearing
1, Self-aligning ball bearing
2, Self-aligning roller bearing
3, Tapered roller bearing
4, Double row deep groove ball bearing
5, Thrust ball bearing
6, Deep Groove Ball Bearings
7, Angular contact ball bearing
8, Thrust cylindrical roller bearing
N, Cylindrical roller bearing
U, Outer spherical ball bearing
QJ, Ball Miniature Bearings
So how to identify ball bearing dimensions, pls look at the following examples.
Bearing the basic code: three of digits, four digital composition, five digital composition, belly.
A, three digital composition: from right to left number, the first digital representation neijing size, Numbers are a few inside is a few mm. For example: 608 bearing inside diameter is 8 mm.
Second, the four digital and five digital composition: from right to left number, the former two Numbers is inside code.
00 said bearing inside diameter is 10 mm,
An 01 result indicates the inner diameter of the bearing is 12 mm,
02 said bearing inside diameter is 15 mm,
03 said bearing inside diameter is 17 mm.
The above (contain 04) is equal to the inner diameter size from right to left number, the former two Numbers multiplied by five.
For example: 6201 inside diameter size is: 12 mm.
6204 bearing inside diameter is: 20 mm.
Three, bearing type has forward slash, forward slash right number is inside diameter size.
For example: NK20/16 inside diameter was 16 mm.
230/500 bearing diameter is 500 mm.