ceramic beads
- Description:
Low thermal conductivity.
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Si3N4 Ceramic Bearing Ball of High Quality:
Their characteristics are shown as below:
1. High corrosion resistance, which means they can be also used in strong acid,strong alkali and seawater.
2. High temperature resistance. Si3N4 ceramic balls remain the same strength and hardness even in 1100 ℃.
3. Electrical insulation, non-magnetic, They can also be used in magnetic domain.
4. Si3N4 ceramic balls have a low density of 3.26 g/cm3. It is approximately 60% lighter than steel balls, which extremely decrease the centrifugal force on the groove, in order to effectively reduce the wear and tear.
5. High rigidity and strength. Compared with bearing steel, Si3N4 ceramic is double higher in hardness and half higher in elastic modulus value.
6. The coefficient of thermal expansion of Si3N4 is 3.2×10-6/K. It is nearly 25% of the bearing steel, which leads to a good thermal shock resistance.
7. The self-lubrication of Si3N4 ceramic ball bearings can help to solve the contamination and inconvenient caused by lubricator, it can also be used in vacuum and high temperature conditions.
8. Low thermal conductivity.Balls Grade or Ball Gauge
Unit is mironmeter(microinch)
Grade
VDwL
max
Gauge Gap
Priority Gauge
Subgauge Gap
ball subgauge
G2
0.08(3)
0.5
-5,…,-0.5, 0, +0.5,…,+5
0.1
-0.2, -0.1, 0, +0.1, +0.2
G3
0.13(5)
0.5
-5,…,-0.5, 0, +0.5,…,+5
0.1
-0.2, -0.1, 0, +0.1, +0.2
G5
0.25(10)
1
-5,…,-1, 0, +1,…,+5
0.2
-0.4, -0.2, 0, +0.2, +0.4
G10
0.5(20)
1
-9,…,-1, 0, +1,…,+9
0.2
-0.4, -0.2, 0, +0.2, +0.4
G16
0.8(32)
2
-10,…,-2, 0, +2,…,+10
0.4
-0.8, -0.4, 0, +0.4, +0.8
G20
1.0(40)
2
-10,…,-2, 0, +2,…,+10
0.4
-0.8, -0.4, 0, +0.4, +0.8
G24
1.2(48)
2
-12,…,-2, 0, +2,…,+12
0.4
-0.8, -0.4, 0, +0.4, +0.8
G28
1.4(55)
2
-12,…,-2, 0, +2,…,+12
0.4
-0.8, -0.4, 0, +0.4, +0.8
G40
2.0(80)
4
-16,…,-4, 0, +4,…,+16
0.8
-1.6, -0.8, 0, +0.8, +1.6
G60
3.0(120)
6
-18,…,-6, 0, +6,…,+18
1.2
-2.4, -1.2, 0, +1.2, +2.4
G100
5.0(200)
10
-40,…,-10, 0, +10,…,+40
2
-4, -2, 0, +2, +4
G200
10(400)
15
-60,…,-15, 0, +15,…,+60
3
-6, -3, 0, +3, +6
Grade
Vdws
( △ Sph)
(Ra)
less than， μ m
3
0.08
0.08
0.012
5
0.13
0.13
0.02
10
0.25
0.25
0.025
16
0.4
0.4
0.032
20
0.5
0.5
0.04
28
0.7
0.7
0.05
40
1
1
0.08
60
1.5
1.5
0.10
100
2.5
2.5
0.125
200
5
5
0.2
Application domains:high precise ceramic bearings, high temperature bearings, vacuum bearings, nonmagnetic bearings, chemical pumps, high temperature pumps, ceramic valve balls and measure balls.
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bearing balls size
Size (inch) Size (mm) Size (inch) Size (mm) 1.5 1/16 " 1.588 2 3/32 2.381 1/8 " 3.175 5/32 " 3.969 3/16 " 4.763 7/32 " 5.556 1/4 " 6.35 17/64 " 6.747 7 9/32 " 7.144 5/16 " 7.938 11/32 " 8.731 3/8 " 9.525 13/32 " 10.319 7/16 " 11.112 29/64 " 11.509 15/32 " 11.906 12 31/64 " 12.303 1/2 " 12.7 17/32 " 13.494 14 9/16 " 14.288 19/32 " 15.081 5/8 " 15.875 21/32 " 16.669 11/16 " 17.463 23/32 " 18.256 3/4 " 19.05 25/32 " 19.844 20 13/16 " 20.638 7/8 " 22.225 15/16 " 23.812 1 " 25.4 1-1/16 " 26.988 1-1/8 " 28.575 2001/3/16 30.163 1-1/4 " 31.75 1-3/8 " 34.925 35 1-1/2 " 38.1 1-5/8 " 41.275 1-11/16 " 42.863 1-7/8 " 47.625 2 " 50.8 -
Our Services
1. Full technical support from concept design to final product delivery
2. On-time delivery with no compromise on quality
3. High-quality product making with advanced equipment and techniques
4. Large-scale of proudction availabl
5. Lower cost (medium-size factory, 3000 square meters), but high-end quality only(the
same quality control system as per big factory)6. Any questions to be sent will get response within 24 hours FAQ
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FAQ
a) How to prolong service life of bearings?
Accurate installation and using,alignment,timely monitor,re lubrication etc.
b) Reason for bearings failure?
Usually is incorrect using method,pollution,improper use of lubricant,damage happened
in installation and handing,also including installation error.according to the traces can
know the reason why is failure.c) How to choose bearings?
Analyse mechanical device and use conditions.clear the requiremment of
bearings.select type of bearings,select distribution way of bearings.selet dimensions of
bearings,select installation method of bearings.d) When select bearings specifications,what you need to consider?
The precision of the bearings(rotating precision,dimensional tolerances)internal
clearance and preload bearing material and heat treatment.structure of cage and material.e) Payment method,packing way,transport method,time of delivery? T/T,PAYPAL,WESTERN UNION,L/C
Tube,box,carton,pallet, By sea,by air 3-15days after receipt of payment.
