Q1:The old bearing model is NJ312E. What type of bearing is it now?

A:NJ312e is a new type of steel retainer, the internal structure of the reinforced type is now 38

42312 is the old copper retainer, the regular one is now 35

The 42312H is the old copper retainer, the enhanced one is thought to be 45

The 42312E is an old steel retainer, the enhanced version is now 38

Q2:What are the related parameters of TIMKEN Inch bearing 755/752?

A:Model: 755/752

Brand: TIMKEN

Series: double outer ring tapered roller bearings

Inner ring: 755

Outer ring: 752 d

Every sha-lu: X2S running perpendicular – 755

Inner diameter: 76.200mm

Outer diameter: 161.925mm

Thickness: 104.775 mm

Q3:What is the algorithm of bearing inner and outer diameter and type?

A:Nominal inner diameters 0.6~10 are directly expressed as nominal inner diameters in millimeters, separated from the size series code by “/”.

Nominal inner diameters 1~9 are directly expressed by the nominal inner diameters of millimeters. For deep groove ball bearings, angular contact bearings 7, 8, 9 diameter series are used

Separated from the size series code by a “/”.

Nominal inner diameters 10, 12, 15, 17 are denoted by 00, 01, 02, 03.

Nominal inner diameter 20 to 480 (except 22, 28, 32), the nominal inner diameter divided by the quotient of 5, add zero to the left of the units digit.

Nominal inner diameters 500 and above and 22, 28, 32 are directly expressed as nominal inner diameters in millimeters, and are used between them and the size series code

“/” to separate.

Q4:What is meant only mark ф20K5，in bearing matching?

A:Because the bearing is a standard part, its inner hole tolerance is generally controlled by the standard without special requirements. The specific tolerance value can be queried in the standard or manual or bearing sample. The tolerance of the inner and outer ring of the general metric bearing is nominal size negative difference, generally from the nominal size to minus one to two wires. Therefore, in the assembly drawing, the fitting relationship is only marked with the tolerance of the diameter of the bearing file of the shaft matching the bearing. The dimensional tolerance of the shaft is K5, which is interference fit with the bearing.

Q5:What is the meaning of 150YP in 6204 TB.P63 bearing?

A:6204TB.P63, FAG, 150YP

6204– Bearing series and dimension code

TB– Cage material

P63–P6 accuracy level, C3 clearance

150YP– Date of manufacture and code of origin, available through Schaeffler.

Q6:What is the model of front wheel bearing of Mercedes-benz SLK230 sports car?

A:SLK230 when buying accessories, say which style you need? For example, for the North American model, for example, for the Japanese model, for example, for the European model, the numbers and models of parts in different regions are also different on the internal website of Mercedes-benz.

Several references are provided:

Benz SLK class SLK230 170447 North America 2.3L 5AT two shaft bearings

Benz SLK class SLK230 170447 North America 2.3L 5MT two shaft bearings

Benz SLK class SLK230 170447 Europe 2.3L 5AT two axle bearings

Benz SLK class SLK230 170447 Europe 2.3L 5MT two axle bearings

German Benz SLK SLK230 170447 Japan 2.3L 5AT two shaft bearings

Benz SLK class SLK230 170449 North America 2.3L 5AT two shaft bearings

Benz SLK class SLK230 170449 North America 2.3L 6MT two shaft bearings

Benz SLK class SLK230 170449 Europe 2.3L 5AT two axle bearings

Benz SLK class SLK230 170449 Europe 2.3L 6MT two axle bearings

German Benz SLK SLK230 170449 Japan 2.3L 5AT two shaft bearings

German Benz SLK SLK230 170449 Japan 2.3L 6MT two shaft bearings

In the above bearings, the word beginning with 17 in the middle is the number. In fact, it is recommended that you sign up for the first few digits of your frame number when you buy it.

Q7:How to check the tolerance grade of 9 base shaft system up and down deviation Φ80s9/h9 ?

A:The fit of bearing inner hole and shaft is overfit of base hole system, usually H7/ K6 is selected. The fit of bearing outer diameter and base hole is overfit of base shaft system, and the fit of interference is slightly smaller than that of bearing inner hole and shaft. The corresponding tolerance value of Js7/ H6 is usually found out from relevant manuals according to basic size

Q8:What is the model of one-way thrust ball bearing?

A:The inner diameter is 35, the outer diameter is 62 and the thickness is 18. May I ask the model number of this one-way thrust ball bearing is 510207, the old model is 8207

The inner diameter is 25, the outer diameter is 47 and the thickness is 12. May I ask the model of this one-way thrust ball bearing is 7007AC, the old model is 46105

Q9:How is the bearing type calculated?

A:Model — Basic model

– A number or a letter or letter combination to indicate the bearing type; The actual bearing type can be seen in the schematic diagram.

— The last two digits determine the ISO size series; One digit represents the width or height series (dimensions B, T, or H, respectively) and the second digit represents the diameter series (dimensions D).

— The last two digits of the basic model are the size code of the bearing; Multiply by 5 to find the inside diameter in mm.

But there are exceptions to any rule. Important exceptions to the bearing type system are listed below.

1. In some cases, a number indicating the bearing type and/or a number indicating the size series is omitted. These figures are enclosed in brackets in the table.

2. For bearings with an inner diameter less than or equal to 10mm or greater than or equal to 500mm, the inner diameter is usually expressed in mm, without code. Dimensions are separated from the rest of the bearing type by a diagonal line, e.g. 618/8 (d=8mm) or 511/530 (d=530mm).

In accordance with ISO 15:1998

The method also applies to standard bearings with diameters of 22, 28 or 32mm, such as 62/22 (d=22mm).

3. Bearings with inner diameters of 10, 12, 15 and 17mm have the following size code marks:

00=10mm；01=12mm

02=15mm；03=17mm

4. For some smaller bearings with an inner diameter of less than 10mm, such as deep groove, self-aligning and angular contact ball bearings, the inner diameter is also indicated by mm (no code name), but it is not separated from the series by a diagonal line, such as 629 or 129 (d=9mm).

5. The bearing inner diameter that deviates from the standard inner diameter is always not coded, but expressed by as many as three decimal mm. The id mark is part of the base model and is separated from the base model by a diagonal line, e.g. 6202/15875 (d=15875mm=5/8 in.).

Q10:Is the model of the outer spherical bearing the same as that of the supporting bearing seat?

A：The outer spherical bearing and its supporting bearing seat are sold in sets. The bearing model contains the size of the bearing seat.

Q11:What model is 22310?

A:22310EAKE4

22310: is the basic code of the bearing. The basic codes of bearings are composed of five numbers.

EAKE4: is the rear code of the bearing. A code name used to indicate some other accessories, structures, clearance, and precision grades of bearings.

Basic code: number from right to left

10: indicates that the inner diameter of the bearing is 10*5=50mm

3: indicates that the diameter of the bearing is “3” series

2: indicates that the bearing width size is “2” series

2: indicates that the structural form of bearing is self-aligning roller bearing

Bearing inner diameter size expression method:

(1) The basic code name of the bearing is exactly 5 numbers: multiply the first two numbers from right to left by 5

The first two numbers are: the inner diameter of 03 is equal to 17mm

The inner diameter of the 02 is equal to 15mm

The inner diameter of 01 is equal to 12mm

The inner diameter of 00 is equal to 10mm

The basic code of 4 numbers, as the deformation of 5 numbers.

Example: 6204 is actually 6 (0) 204, where (0) is the width code, standard width, code omitted not written

Example: 2304 is actually (0) 2304, where (0) is the type code, aligning ball bearing. Omit don’t write

(2) three numbers: the bearing diameter size is equal to the first number from right to left

Example: 608 zz1mc3er

The inner diameter of the bearing is 8mm

(3) Bearing type with slash (/). The number to the right of the slash is the inside diameter.

Bearing outer diameter series expression method:

“0” means light weight outer diameter series bearings

“2” means medium diameter series bearings

“3” stands for heavy-duty outer diameter series bearings

“4” means super heavy outer diameter series bearings

“8” means extra-light outer diameter series bearings

“9” means ultra-light outer diameter series bearings

Bearing width series bearing representation method:

Width series are successively “0” “1” “2” “3” “4” “5” “6” “7” “8” “9”

Series. Generally, the “0” width label is omitted.

Example: 6314

14: indicates that the inner diameter of the bearing is 14*5=70mm

3: indicates that the outer diameter size of the bearing is “3” outer diameter series (heavy duty)

6: indicates that the structural form of bearing is deep groove ball bearing

The secondary bearings are “0” width series and should be between 6 and 3, but are omitted. If it is other width series can not be omitted.

Example: 62314

If the width is 2, you can’t omit it.

The structural representation method of bearings is as follows:

Usually: a number from left to right.

“6” means deep groove ball bearing (in China it is called zero tired bearing)

“0” (generally omitted) means self-aligning ball bearing (it is called “1” class bearing in China)

“N” means short cylindrical roller bearing (it is called “2” type bearing in China)

“2” means self-aligning roller bearing (it is called “3” type bearing in China)

“NA, HK, RNA, CF, NART, NURT, AXK, NTB, NATA, NATB” means needle roller bearing (it is called “4” type bearing in China)

“7” means angular contact ball bearing (it is called “6” class bearing in China)

“3” means tapered roller bearing (it is called “7” type bearing in China)

“51” means centripetal thrust ball bearing (it is called “8” type bearing in China)

“29” means thrust (self-aligning) roller bearing (in China, it is called “9” class bearing