bearing,轴承,hongs,宏施
CHINESE
 
TECHNOLOGY TECHNOLOGY  APPLICATION EXHIBITION LUBRICATION

MATERIAL:   Usually rings and balls are made with the material of is GCr15 basic electric high carton chromium bearing steel( equivalent of JIS G 4805 SUJ2 steel)as well as stainless steel 9Cr18(AISI440) and beryllium Bronze. The cages are usually punch-pressed from brass strips H62 or steel 08,SPCC,or stainless 3Cr13,1Cr18Ni9,and fiber reinforced phenolic resin ,plastics,copper stock, Sheals are made with the material of steel 10 or 08AI,SPCC,stainless steel 1Cr18Ni9 The seals are made with the material of synthetic rubber and Teflon.
The chemical composition of the material(GCr15)
C Cr P Mn Si S
GCr15 0.95-1.05 1.3-1.65 <=0.27 0.2-1.4 0.15-0.35 <=0.02
9Cr18 0.90-1.05 <0.8 <0.8 <0.04 <0.03 16-19
HARDNESS OF MATERIAL   The hardness of bearing rings are HRC61-65,The ball are HRC62-66.
BEARING TOLERANCE:   Usually, the tolerance of our products are ABEC1 without specifying. Please select the exact tolerance you want when order, the comparison table is made as following for reference!
Standard
Classification of tolerance
ANSI
ABEC1
ABEC 3
ABEC 5
ABEC 7
SKF
0
P6
P5
P4
GB307-84
G
E
D
C
GB/T307-94
0
6
5
4
ISO
0
6
5
4
JIS
P0
P6
P5
P4
DIN
P0
P6
P5
P4
RADIAL INTERNAL CLEARANCE:   The radial internal clearance of our products is same as the value of GB/T4604-93(equivalent of ISO 5753-1991),usually, the clearance of our products is basic group(Co group), as well as other clearance at your request,the clearance can be divided the following group.

Bore Diameter

Group

Normal

Group

Group

d (mm)

2

Group

3

4

over to

min

max

min

max

min

max

min

max

2.5  6

0

7

2

13

8

23

-

-

6    10

0

7

2

13

8

23

14

29

10---18

0

9

3

18

11

25

18

33

PACKAGE   Usually ten pieces in one plastic tube,ten tubes in one box. As well as customers request.
SHIELDS The shields could be ZZ(white metal),2RS(rubber seals),2TS(Teflon seal) and SPCC.