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Ceramics Balls

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Ceramic balls are spherical, rolling elements that provide higher stiffness, lower thermal expansion, lighter weight, increased corrosion resistance, and higher electrical resistance than steel balls. They are made from a variety of ceramic materials.

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Description

Ceramic balls are Spherical, Rolling Elements that Provide higher Stiffness, Lower Thermal Expansion, Lighter Weight, Increased Corrosion Resistance, and Higher Electrical Resistance than Steel Balls. They are made from a variety of Ceramic Materials.

 

Si3N4
ZrO2
SiC
Al2O3
STEELS
Item
Unit
 
Bearing Steel
Stainless Steel
Density
g/cm3
3.2~3.3
6.00
3.1~3.2
3.95
7.85
7.90
coefficient of linear expansion
10-6/K
3.20
10.50
4.50
8.50
10.0
11.0
Young’s modulus
Gpa
300~320
210
350
380
208
200
Poisson’s ratio
0.26
0.30
0.20
0.22
0.30
0.30
HRC Hardness
1400~1600
1000~1200
2500
1600~1800
700
30-62
Bending strength
Mpa
800
950~1200
350
300~500
2400
 
Fracture toughness
MPam1/2
5.0~8.0
8.0~10.0
3.0~4.0
3.0~4.0
25
 
Thermal conductivity
W/mK
35
2~3
150
30
30~40
15
Special electrical Resistance
Ωmm2/m
1018
1015
1013
1018
0.1~1
0.75
Corrosion Resistance
 
good
good
good
good
poor
poor
Self-lubrication
 
good
good
good
 
poor
poor
Magnetism
 
 
 
 
 
magnetic
magnetic
Centrifugal force
 
little
 
 
 
high
high
Rolling Contact Fatigue
 
spalling
crush
crush
crush
spalling
 

Additional information

Grade

100, 200, 48, 98.58, 99.99

Size

02 mm, 04 mm, 08 mm, 10 mm, 100 mm, 16 mm, 25 mm

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