What Are Our Concerns About Bearings（11）

Q1:What is the model number of bearings with 54 mm outside diameter?

A:Rolling bearings are divided into centripetal bearings and thrust bearings according to their load direction or nominal contact Angle.  The radial contact bearings are centripetal bearings with nominal contact angles of 0 and centripetal angular contact bearings with nominal contact angles greater than 0 to 45.  Axial contact bearings are thrust bearings whose nominal contact Angle is 90, and thrust angular contact bearings whose nominal contact Angle is greater than 45 but less than 90.  

According to the shape of the rolling body can be divided into ball bearings and roller bearings.  Roller bearings are divided into cylindrical roller bearings, needle roller bearings, tapered roller bearings and self-aligning roller bearings.  

According to its work can be divided into self-aligning bearings —- raceway is spherical, can adapt to the angular deviation and angular motion between two raceway axis line bearings and non-self-aligning bearings (rigid bearings)—- can resist the angular deviation between raceway axis line bearings.  

According to the column number of the rolling body, it is divided into single row bearings, double row bearings and multiple row bearings.  

According to its components (rings) can be separated into separable bearings and non-separable bearings.  

According to its structure shape (such as whether there is a filling groove, whether there is an inner ring, outer ring and the shape of the ring, the structure of the guard edge, and even whether there is a cage, etc.) can also be divided into a variety of structural types.  

According to its outer diameter size, it is divided into miniature bearings (<26mm), small bearings (28-55mm), small and medium-sized bearings (60-115), medium and large bearings (120-190mm), large bearings (200-430mm) and very large bearings (>440mm).  

According to the application field, it can be divided into motor bearings, rolling mill bearings and main bearings.  

According to the material is divided into ceramic bearings, plastic bearings and so on.  

Q2:How to write the bearing model in pen?

A:The standard bearing shall be marked with bearing code, bearing name, (bearing size specification), bearing standard number;  

For example, common bearings (old type zero class 105) : bearing code 6005, bearing name is deep groove ball bearing, bearing size specifications 25*47*12, bearing standard number is GB276-89, if there is a precision requirement, but also in the bearing code after the accuracy grade (P6), such as the sealing method has requirements and dustproof marking.  

General pen: bearing 6005

Q3:How to determine its type according to the inner and outer diameters of bearings?

A:First of all, according to its form, determine what type of bearing it is. Different types have different numbers.  If it is common deep groove ball bearings for 6, there are  angular contact ball bearings, cylindrical roller bearings,  tapered roller bearings and so on.  

The outer diameter and thickness can determine whether it is light 1, medium 2, or heavy 3 bearing.  

Divide the inside diameter by 5 to determine the last two digits.  If you have an inside diameter of 30, then the last two would be 06.  

Q4:What is the model of flat bearing with inner hole 30 mm and outer circle 50 mm?

A:Bearing size may not be accurate 30*47*11 ,this model is 51106.

Q5:what kind of bearing is 688808, how much size, what occasions application in ?

A:This model is clutch bearing  

Used in the gearbox of agricultural vehicles  

Inside diameter 40  

Diameter of 67  

The thickness of 14.3  

Q6:Bearing type is 7201AC, what does 7 in it mean?

A:Code use: represents the structure, size, type, precision of rolling bearings, code by the standard GB/T272-93 provisions.  

Composition of code name:  

Prefix code – indicates bearing parts  

Basic code – indicates the bearing type and size and other main characteristics  

Rear code – indicates bearing accuracy and material characteristics  

Inner diameter code: under normal circumstances, bearing

inner diameter code (the last two digits of the basic code) ×5= inner diameter (mm), for example: bearing 6204 inner diameter is 04×5=20mm.  

Q7:SKF bearing The inner diameter is 25 and the outer diameter is 47 and the thickness is 22. ,What is the type of one-way bearing?

A:NKIS25 needle roller bearings with inner ring in the product series of solid ring needle roller bearings, there are two types, one with clamp spring groove on the outer ring surface, the other without.

Q8:What are the SKF bearing models?

A:0 — Angular contact ball bearing  

1 — Self-aligning ball bearing  

2 — Self-aligning roller bearings and thrust self-aligning roller bearings  

3 — Tapered roller bearings  

4 — Deep groove ball bearings  

5 — Thrust ball bearing  

6 — Deep groove ball bearings  

7 — Angular contact ball bearings  

Thrust cylindrical roller bearing  

N — Cylindrical roller bearing  

NN — Double row or multiple row cylindrical roller bearings  

Q9:SKF Bearing (inner hole about 120mm, wall thickness about 20mm)  what type of is bearing ?

A:Model 16024, deep groove ball bearing inner diameter 120mm, outer diameter 180mm, width 19mm

Model 61924, deep groove ball bearing inner diameter 120mm outer diameter 165mm,width 22mm  

Q10:Cone roller bearing size is 190*105*50 what type of is bearing ?

A：The specific model is 32221  

Outer diameter: 190 mm  

Inside diameter: 105 mm  

Inner diameter width: 50mm  

Outside diameter width: 43mm  

Assembly width: 53mm  

Q11:Does the type of sliding bearing have naming rules like rolling SKF bearing?  If so, by what rules?  

A:Now the industry is basically in accordance with the inside diameter + length (also called width) to name, as for the outside diameter, the manufacturer will tell you the size, you can also customize.  

For example, for bearings with 60 inner diameter and 100 length, the manufacturer is 60100.  

In general, when ordering, you can choose the corresponding bearing form through the manufacturer first, and then select it according to the manufacturer’s sample. If the sample is not available and you need to customize it, you need to tell the manufacturer the working state, load state, outer diameter, inner diameter and length (also called width) of the bearing.