What Are Our Concerns About Bearings（39）

Q1:What does it mean to add NDE or DE before bearing model number?

A:DE indicates the driver end, and NDE indicates the non-driver end.  

Q2:Bearing 6408N, what does N stand for?

A:Bearing 6408N,N stands for: bearing outer ring with stop ring groove.  Model: 6408N, brand: SKF, series: deep groove ball bearings, single row, with stop ring groove, no seals.  

Q3:Bearing code 6210 30215/ P6 What are the meanings of these two codes respectively?  

A:First look at the deep groove ball bearing 6210  

6: indicates deep groove ball bearing  

2: width series code  

10: inner diameter size code, indicating that the inner diameter is 10*5=50mm  

Tapered roller bearing 30215/P6  

3: tapered roller bearings  

0: width series code  

2: Outer diameter series code  

15: Inner diameter size code  

P6: Tolerance grade, accuracy is higher than ordinary grade

Q4:What does s11 mean after the bearing type?

A:This is the suffix of NSK bearing in Japan, which means that the working temperature of the bearing can reach 200 degrees!  

Q5:What does SKF bearing suffix code NU226ECML mean?

A:NU226ECML shall be SKF brand identification method  

EC: Optimized internal design including more and/or larger rollers and modified roller/end flange contacts  

M: Two – component machined copper cage, centering with rollers  

ML: Integral molding processing window type copper cage, inner ring or outer ring centering  

Q6:What is the meaning of C3 after bearing model NU226 / C3?

A:In simple terms, the clearance is the gap between the rolling body and the inner and outer ring  

C3 refers to C3 group clearance, which can be divided into three groups from small to large  

C1, C2, C0, C3, C4, C5  

The clearance of group C0 is normal group, the clearance of group C0 becomes smaller to the left, and the clearance of group C0 becomes larger to the right  

Therefore, the gap of C3 group is slightly larger than that of normal group, and its advantage is that it can reduce the locking caused by thermal expansion  

The downside is that it’s vibrating and noisy  

Q7:What does bearing model 111/GB276-89 mean?  

A:1, deep groove ball bearings,  

2. Gb276-89 has been replaced by GB276-94.  

3. Model 111 is equivalent to 16011 of the new standard.  

4. Bearing size: inner hole 55, outer diameter 90, thickness 11 

Q8:What is the meaning of YZ in bearing model 7003C/P4YZ?

A:7 represents angular contact bearing;  00 indicates the size series code;  C represents the nominal contact Angle A =15 degrees;  P4 means that the tolerance grade meets the standard level 4;  As for YZ, there are only YA and YB.  I personally think Y stands for copper stamping cage;  Z indicates that one side has a dust cover.

Q9:51108 bearing, what does it mean to add a G at the back?

A:Suffix meaning:  

G: Ring, rolling body is carburized steel.  

E: Internal code, reinforced cylindrical roller bearing  

M: Copper alloy cage  

W: Steel cage  

This is the suffix for NSK

Q10：What does bearing 22219CA-W33 model represent?

A:222: Self-aligning roller bearing  

19:inner diameter d = 5*19=95mm  

CA: External spherical design with rivets  

W33: oil hole oil groove  

Q11:What is it ZWZ bearing 7228BM/DB suffix letter M meaning?

A:7228: Code for angular contact ball bearing.  

B: It’s the contact Angle: 40 degrees.  

M: The cage is made of copper.  

DB: Bearing installation mode, is back-to-back installation.