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¡ù¡¡Manufacturing process


¡ù¡¡Bearing Material
  Rings(cups & cones) & Rolling elements
ZIX bearing rings(cups & cones), balls & rollers are made of GCr15 high carbon chromium bearing steel
This steel No. is equal to the AISI 52100(U.S.A.), DIN 100Cr6(Germany), JIS SUJ2(Japan) etc.

Chemical composition of GCr15 steel:
Steel No.
Chemical composition %
GCr 15
C
Si
Mn
P
S
Cr
Mo
Cu
Ni
0.95-1.05
0.15-0.35
0.25-0.45
¡Ü0.027
¡Ü0.02
1.40-1.65
-
¡Ü0.25
¡Ü0.30

Contrast of steel no. in different countries
Country
China
ISO
U.S.A.
Japan
Germany
France
Sweden
Standard
GB
AISI
JIS
DIN
NF
Steel No.
GCr15
683/XVLL1
52100
SUJ2
100Cr6
100C6
SKF3

Hardness
Hardness of bearing rings(cups & cones) & rolling elements is HRC60¡«HRC65.

Retainers
ZIX standard bearing retainers are made from cold rolled carbon steel. However, in cases of heavy duty, corrosive environment,misalignment and high speed operation, brass, stainless steel, nylon or phenolic resins will be used upon request.

Seals & Shields
ZIX shields also employ carbon steel as standard.
Buna Nitrile is the standard and mostly common used material for ZIX seals. Also, in order to meet the requirements of high temperature operation and compatibility with grease, a variety of other sealing materials are also applied to the seals.

Lubrication
Standard grease and oil are applied to ZIX bearing products
ZIX can also use special pointed brand grease or oil upon request


¡ù¡¡Tolerance
  ZIX bearing tolerance standard accords with Chinese national standard GB/T307(equal to ISO492)
The following are the contrast tables of Chinese national standard with the foreign standards.

Contrast of tolerance class for radial bearings in different countries(except tapered roller bearing)
Country
Standard
Tolerance class
China
GB/T307
0 (G)
6 (E)
5 (D)
4 (C)
2 (B)
ISO
ISO492
0
6
5
4
2
Sweden
SKF
0
P6
P5
P4
P2
Germany
DIN 620/2
P0
P6
P5
P4
P2
U.S.A.
ANSI B3.14
ABEC1
ABEC3
ABEC5
ABEC7 
ABEC9
Japan
JIS B1514
0
6
5
4
2

Contrast of tolerance class for tapered roller bearing(metric size) in different countries
Country
Standard
Tolerance class
China
GB/T307
0
P6x
 ¡¡
P5
P4
 ¡¡
ISO
ISO492
0
6x
 ¡¡
5
4
 ¡¡
Sweden
SKF
0
CLN
 ¡¡
P5
 ¡¡
¡¡
U.S.A.
ANSI
K
 ¡¡
N
C
B
A
Japan
JIS
0
6x
6
5
4
 ¡¡

Contrast of tolerance class for tapered roller bearing(inch size) in different countries
Country
Standard
Tolerance class
China
ZIX
4
 ¡¡
3
 ¡¡
¡¡
ISO
ISO492
4
 ¡¡
3
0
00
Sweden
SKF
0
 ¡¡
CL3
CL0
 ¡¡
U.S.A.
ANSI
4
2
3
0
00
The standard manufacturing tolerance of ZIX bearing is Class 0. Other tolerance grade can be supplied upon request

Tolerance of Class 0 radial bearing

Inner ring
d
¡÷dmp
Vdp
Vdmp
¡÷Bs
¡÷B1s
VBs
Kia
over
incl.
high
low
Dimension series
max
high
low
high
low
max
max
mm
µm
8, 9
0, 1
2, 3, 4
µm
µm
µm
µm
µm
max (µm)
2.5
10
0
-8
10
8
6
6
0
-120
0
-250
15
10
10
18
0
-8
10
8
6
6
0
-120
0
-250
20
10
18
30
0
-10
13
10
8
8
0
-120
0
-250
20
13
30
50
0
-12
15
12
9
9
0
-120
0
-250
20
15
50
80
0
-15
19
19
11
11
0
-150
0
-380
25
20
80
120
0
-20
25
25
15
15
0
-200
0
-380
25
25
120
180
0
-25
31
31
19
19
0
-250
0
-500
30
30
180
250
0
-30
38
38
23
23
0
-300
0
-500
30
40
250
315
0
-35
44
44
26
26
0
-350
0
-500
35
50
315
400
0
-40
50
50
30
30
0
-400
0
-630
40
60
400
500
0
-45
56
56
34
34
0
-450
0
-630
50
65
500
630
0
-50
63
63
38
38
0
-500
0
-800
60
70
630
800
0
-75
 -
 -
 -
 -
0
-750
 -
 -
70
80
800
1000
0
-100
 -
 -
 -
 -
0
-1000
 -
 -
80
90
1000
1250
0
-125
 -
 -
 -
 -
0
-1250
 -
 -
100
100
1250
1600
0
-160
 -
 -
 -
 -
0
-1600
 -
 -
120
120
1600
2000
0
-200
 -
 -
 -
 -
0
-2000
 -
 -
140
140

Outer ring
D
¡÷Dmp
VDp
VDmp
¡÷Cs
¡÷C1s
VCs
Kea
over
incl.
high
low
Dimension series
With oil seals
max
high
low
high
low
max
max
mm
µm
8, 9
0, 1
2, 3, 4
or shields
µm
µm
µm
µm
µm
max (µm)
6
18
0
-8
10
8
6
10
6
same as inner ring ¡÷Bs, ¡÷B1s, VBs
15
18
30
0
-9
12
9
7
12
7
15
30
50
0
-11
14
11
8
16
8
20
50
80
0
-13
16
13
10
20
10
25
80
120
0
-15
19
19
11
26
11
35
120
150
0
-18
23
23
14
30
14
40
150
180
0
-25
31
31
19
38
19
45
180
250
0
-30
38
38
23
 -
23
50
250
315
0
-35
44
44
26
 -
26
60
315
400
0
-40
50
50
30
 -
30
70
400
500
0
-45
56
56
34
 -
34
80
500
630
0
-50
63
63
38
 -
38
100
630
800
0
-75
94
94
55
 -
55
120
800
1000
0
-100
125
125
75
 -
75
140
1000
1250
0
-125
 -
 -
 -
 -
 -
160
1250
1600
0
-160
 -
 -
 -
 -
 -
190
1600
2000
0
-200
 -
 -
 -
 -
 -
220
2000
2500
0
-250
 -
 -
 -
 -
 -
250

Tolerance of Class 0 tapered roller bearing (metric size)

Cone and width
d
¡÷dmp
Vdp
Vdmp
¡÷Bs
Kia
¡÷Ts
¡÷T1s
¡÷T2s
over
incl.
high
low
max
max
high
low
max
high
low
high
low
high
low
mm
µm
µm
µm
µm
µm
µm
µm
µm
10
18
0
-12
12
9
0
-120
15
+200
0
+100
0
+100
0
18
30
0
-12
12
9
0
-120
18
+200
0
+100
0
+100
0