693ceramic Bearing 3x8x3
693ceramic Bearing 3x8x3
693 ceramic bearing have excellence performance as special electrical and magnetism resistance , could be used in awful environment andspecially condition.
Comparison of bearing material technical data: |
|||||||
Performance |
Unit |
GCr15 |
9Cr18 |
Si3N4 |
ZrO2 |
|
|
Density |
g/cm3 |
7.8 |
7.9 |
3.2 |
6 |
|
|
Thermal expansion α |
10-6/℃ |
11 |
17 |
3.2 |
10.5 |
|
|
Elastic modulus E |
GPa |
208 |
200 |
320 |
210 |
|
|
Poisson's ratioμ |
|
0.3 |
0.3 |
0.26 |
0.3 |
|
|
HardnessHV |
|
800 |
700 |
1700 |
1300 |
|
|
Flexural strength δ |
Mpa |
2400 |
2600 |
900 |
1000 |
|
|
Compressive strength δ |
MPa |
|
|
2000 |
3500 |
|
|
Toughness Kc |
Nm/cm2 |
20 |
25 |
7 |
11 |
|
|
Thermal conductivity λ |
W/mk |
30-40 |
15 |
3.5 |
2.5 |
|
|
Electric resistance Ω |
mm2/m |
1 |
0.75 |
1018 |
1015 |
|
|
Specific heat |
J/KgK |
450 |
450 |
800 |
400 |
|
|
Temperature |
.℃ |
120 |
150 |
1000 |
800 |
|
|
Corrosion-resistant |
|
No |
Weak |
Strong |
Strong |
|
|
Stress cycles (50% failure probability) |
|
10*106 |
10*106 |
50*106 |
50*106 |
|
|
Contact fatigue failure modes |
|
Flake |
Flake |
Flake |
Flake/Break |
|
|
Magnetic |
|
Exist |
Exist |
Not Exist |
Not Exist |
|
|
Dimensional stability |
|
Poor |
Poor |
Good |
Good |
|
|
Insulating |
|
Not insulated |
Not insulated |
Good |
Good |
|
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High quality 693 open ( 0.0005 ( Zro2) 0.00025( Si3N4) 0.0001 (plastic) kg Mass, ID: 3 mm OD: 8 mm WD: 3 mm , po-p6 Accuracy Class , stainless steel ,plastic , ceramic , chrome steel Material ), Just click the button " Contact Now " to mention your purchase Requirement , Quantity and Contact Method of your requested Bearing Item No. 693 open. then click the button " Send " The web site will make your purchasing information sent to the supplier's mailbox, who will come to contact you upon they get your information at the first time.
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