What Are Our Concerns About Bearings（18）

Q1: What type of bearing is the same 3182172 bearing ?

A:3182172: Old Chinese code name.  Double row cylindrical roller bearings with taper inner bore.  Inner ring double guard edge, outer ring no guard edge.  

Code resolution, right to left!  

72: Inner diameter code.  Indicates the inner diameter of the bearing =72×5=360mm  

1: outer diameter code.  Means the outer diameter size of the bearing is 1 series.  

2: type structure code.  In the old code, the fourth number from right to left is 2, indicating cylindrical roller bearings.  

1: Taper code.  Indicates that the inner hole of the bearing has a 1:12 taper.  

3: width code.  The width dimension of the bearing is 3 series.  

NN3072K: New code name in China  

NN: indicates the type structure code.  Double row roller, inner ring double rim outer ring no rim.  

3: width code.  The width dimension of the bearing is 3 series.  Equivalent to the width of the old code 3 series.  

0: outer diameter code.  Indicates that the outer diameter size of bearing is 0 series.  Corresponds to the outer diameter of the old code name series 1.  

72: Inner diameter code.  Indicates the inner diameter of the bearing =72×5=360mm.  The pattern is consistent with the old code.  

K: Taper code.  Indicates that the inner hole of the bearing has a 1:12 taper.  Equivalent to the old code 1 or 11.  

Note: This kind of bearings are generally used in machine tool spindles, and the accuracy grade is at least P5.  

NN3072KCC1P5: Japanese NSK standard code name.  

CC1: non-interchangeable internal clearance.  

NN3072K/SPW33: Swedish SKF standard code.  

SP: code for accuracy class.  Dimensional accuracy and rotation accuracy are different.  

W33: Oil groove with oil hole in outer ring.  

Nn3072ask.m. sp: FAG standard code in Germany.  M: Stands for copper alloy lathe cage.  

NN3072K/P5W33: HRB standard code in China.  

Q2: What bearing is 145TDIK9611BB1662？

A:The full model number of this bearing should be 145TDIK9611BB1662H3 TORRINGTON self-aligning roller bearing  

Q3: What are the detailed parameters of TIMKEN LM287649D/LM287610 bearings?  

A:Brand: TIMKEN  

Category: tapered roller bearings  

Bearing model: LM287649D/LM287610  

Inner diameter (d) : 938.212  

Diameter (D) : 1270  

Width (C) : 400.05  

Quality (Kg) : 1540  

Q4: Bearing 46 type inner diameter 280 outer diameter 420 high 65, what is the bearing?

A:The bearing model is  QJ1056  

Angular contact ball bearing  

Q5: What high temperature are ordinary bearings allowed to work?

A:Ordinary bearings are also divided into many kinds, and the difference of materials has a great impact. It is recommended to list the models you need so that it is convenient to query, and you can check his working parameters on the sales website of bearings.  

I’ll give you an example：  

The allowable operating temperature of Y-bearing mainly depends on the bearing contained in it, the material of cage, the material of seal, and the type of lubricating grease.  

The allowable operating temperature range is as follows:  

— Standard bearings: -20 to +110 degrees Celsius  

— Standard bearings containing food grade greases (NTH and NTR oils) : -45 to +120 degrees Celsius  

— Standard bearings in stamped steel bearing housing with RIS inserts: -20 to +100 degrees Celsius  

Bearings suitable for high temperature environment, VA201 series:

Q6: What are NTN deep groove ball 6018LLU bearing details ?

A:Model: 6018LLU bearing  

Bearing series: deep groove ball bearings  

Old model: 6018-2RS bearing  

Reference Model: 180118 bearing  

Inside diameter: 90  

Outer diameter: 140  

Thickness: 24  

Dynamic load: 58000 N  

Static load: 49500 N  

Note: Deep groove ball bearings with sealing rings on both sides (60000-2RS, 60000-2RZ)  

Q7: How can I know the bearings of different motors?

A:Frame number   Bearing model   Frame number  bearing model  Frame number bearing model  

80 6204  90 6205  100 6206  

112 6306v  132 6208   160 6309  

180 6311   200 6312   225 6314  

250 6317   280 6319   315 6322  

Q8: Do 18324 have this type of bearing?

A:Bearing type: thrust ball bearing  

Inner diameter: 120mm  Outer diameter: 210mm  

Thickness: 80mm        Weight: 12.14kg  

New model: 53324U bearing  

Old model: 18324 bearing  

Q9: What factors are bearing width tolerances related to?

A:The width tolerance of the centripetal rolling bearing is related to the nominal inner diameter of the bearing.  In GB/T 307.1-2005, first determine the bearing tolerance grade, and then according to the nominal size of the bearing inner diameter, check the upper and lower deviation and parallel difference of the width size in the inner ring tolerance table;  The width tolerance of the outer ring is the same as that of the inner ring of the same bearing.  

In GB/T 307.1-2005, the symbols of width tolerance are △Bs, VBs, △Cs, VCs;  

Q10: What is the standard code for one-way needle roller bearings?

A:GB/T5801-2006, there is only this code name for needle roller bearings, including the external dimensions and tolerances of single and double row needle roller bearings.  

A one-way bearing is a bearing that can rotate freely in one direction and lock in the other direction. One-way bearing is also called beyond the clutch, but according to different industries, different roles to name.  The metal shell of a one-way bearing contains many rollers, needles or ball bearings, and the shape of its rolling seat (hole) makes it roll only in one direction, while there will be great resistance in the other direction (the so-called “one-way”).  

Q11: How should the shaft of needle roller bearings be processed and what materials are used?

A:The hardness of bearing steel is above 58 degrees.  The shaft is only 35 degrees, which is probably why it is so badly worn.  

Q12: What is the difference between double row needle roller bearings with the same inner and outer diameter mounting dimensions and single row bearings?  

A：Single row, double row needle roller bearings inside and outside diameter size are the same, width is certainly not the same, double row wider.  Their difference is that the carrying capacity is certainly not the same, double row relative to large.  

Q13: NK20/20 needle roller bearings, how big should the shaft be put in?

A:First of all, NK20/20 is a needle roller bearing without inner ring, which is directly mounted on the shaft for operation. The inner diameter size is the same as the shaft size, which is 20mm.