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Cixi LIC Bearing Co.,Ltd.
Address: Henghe industry developing zone,Cixi city,Zhejiang province, China
Tel: 86-574-66835687
Fax:86-574-63113719

 

 

Accuracy Grade of Bearings
Accruacy Grade Of Bearings
        C&U bearings are manufactured according to the relevant specifications of China's National Standards GB,which are equivalent to ISO standards.

Comparison Table of Accuracy Grade
Code name
Accuracy grade
 
 
 
 
GB
0
6
5
4
2
ISO
0
6
5
4
2
ANSI
ABEC1
ABEC3
ABEC5
ABEC7
ABEC9
SKF
P0
P6
P5
P4
P2
DIN
P0
P6
P5
P4
P2
JIS
0
6
5
4
2

Bearing ring and rolling element materials
        High carbon chrome bearing steel is a ageneral and normally best material for bearing rings and rolling elements. Their chemical composition given below:

Chemical composition of bearing steel GCr15
element content
(wt%)
C
0.95-1.05
Cr
1.40-1.65
Si
0.15-0.35
Mn
0.25--0.45
P
0.027
S
0.002
element content
(wt%)
Ni
<0.23
Cu
0.25
Mo
0.1
Sn
<0.03
As
<0.04
Ti
<0.005
element content
(wt%)
Sb
<0.002
Pb
<0.002
O
<0.0021
Al
<0.05
Ca
<0.01
 

Corresponding designation equivalent to GCr15
China
ISO
USA
Germany
Japan
Sweden
GCr15
683/XVII
52100(ASTM)
100Cr6(DIN)
SVJ2(JIS)
SKF3

Bearing Clearance
        Bearing interal clearance is defined as the total distance through which one bearing ring can be moved relative to the other. The operational clearance of a bearing has great influence on the running condition,life,vibration level,noise value,and thermal expansion of bearing.Following tables give the clearance for the various bearing types in the conditions of without preload.

Radial internal clearance of deep groove ball bearings(including cylindrical bore):
 
Bore
d(mm)
Clearance
C2 C0 C3 C4 C5
over
to
min.
max.
min.
max.
min.
max.
min.
max.
min.
max.
6
10
10
18
0
0
7
9
2
3
13
18
8
11
23
25
14
18
 
29
33
20
25
37
45
18
24
30
24
30
40
0
1
1
10
11
11
5
5
6
20
20
20
13
13
15
28
28
33
20
23
28
36
41
46
28
30
40
48
53
64
10
50
65
50
65
80
1
1
1
11
15
15
6
8
10
23
28
30
18
23
25
36
43
51
30
38
46
51
61
71
45
55
65
73
90
105
80
100
120
100
120
140
1
2
2
18
20
23
12
15
18
36
41
48
30
36
41
58
66
81
53
61
71
84
97
114
75
90
105
120
140
160

Note:When measuring the clearance,we should take into consideration of the extra clearance arisen from the measuring load.

Lubricant Types
CSR Code Brand Name Basic Type Grease Operating Temp.(degree) Uses
L06 Exxon Beacon325 Synthetic grease -55~120 General purpose grease
L01 Exxon
Andok B(Mil-G-18709 A)
Channeling petroleum grease -30~95 Excellent high speed,low torque,light mass
L02 Exxon Andok C Channeling petroleum grease -30~120 Smooth running,long life
L80 G.E. Versilube G300 Silicone grease -75~205 Light loads and fine moderate speed
L60 Mobil 28(Mil-G-81322) Synthetic hydrocarbon -55~180 Wide temperature range,good low temperature torque
L19 Chevron SRI-2 Mineral grease -30~180 High temperature stability with good water resistance
L15 Shell Alvania 2 Mineral grease -35~120 Long life and wide application
L76 DuPon Krytox
240AC(mil-G-2761)
Fluorinated grease -35~290 High temperature stability with good lubricity properties
L31 Shell Dolium R Petroleum grease -40~150 Good corrosion resistance and water resistance
L21 KYODO Synthetic grease -40~150 Low noise,low torque and special case
L91 NIG-ACE W Synthetic grease -18~150 Low noise,low torque and special case
L63 Mobil HP Lithium comples -30~110 vibration,moderate speeds and good corrosion resistance
L08 Motor No.2 Mineral grease -30~110 Wide application, general purpose

Characteristics of Sealing
ZZ 2RS 2RSL
        Low friction torque excellent A excellent A good B
        High speed excellent A excellent A good B
        Grease seal good B excellent A best excellent AA
        dustproof good B excellent A best excellent AA
        waterproof bad C good B excellent A
AA:utmost excellent
A:excellent
B:good
C:bad

 
Copyright CIXI LIC BEARING CO. LTD.
Email: tony.scott.lc@gmail.com
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