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WA799
Ceramic washer

  Appearance   

Washer type

Collar type

Flange type

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Size
 
WA799 –
  [Choose appearance]※Please refer to the specifications for details
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Ceramics (Alumina 95)
Ceramics in abrasion resistance, heat resistance is very good, compared with ordinary steel has greater bending length, less elastic changes, in the chemicalis a very stable. Although there are easily broken, poor processability disadvantages, but lightweight hard, high-temperature heat resistance and excellent insulating properties, from precision machinery to vacuummachines are widely used. Due to the high purity alumina, when used at high temperatures, more volatile impurities can be suppressed and the slide abrasion resistance sre excellent too.

Feature distinguish

Unit

Alumina 99

Alumina 95

Zirconia

Steel S45C

Insulation breakdownstrength

KV/mm

18

16

15

－

Volume resistivity

Ω-cm

>1012

>1012

>1012

－

Bending strength

KN/cm2

>35

>29

>110

－

Compressive strength

KN/cm2

300

250

250

－

Expansion

1/℃

8X10-6

7.8X10-6

10X10-6

13.6

Thermal conductivity

W/m.K

31

22

3

52

Heat resistance

℃

1500

1400

1500

－

Water absorption

%

0

0

0

0

Proportion

g/cm5

3.85

3.6

5.9

7.8

Hardness

HV

1700

1600

1400

130

Main material

－

A1203(>99%)

A1203(>95%)

ZrO2(>94%)

S45C

Reference：Table of information is the average value of the material.
It is the frangible material, please be careful.

            

 Washer type A 

 Collar type B 

 Flange type F 

　

　

　

　

　

　

d

L

D

　

d

L

Designation

1mm

D

　

d

L

Designation

1mm

D

H

3

3

10

　

3

5~50

6

　

3

10、15

6

10

4

3

12

　

4

5~50

8

　

4

10、15

8

12

5

3

15

　

5

5~50

10

　

5

10、15

10

15

6

3

20

　

6

5~50

10

　

6

10、15

10

20

8

3

25

　

8

5~50

12

　

8

10、15、20

12

25

10

3

30

　

10

5~50

14

　

10

10、15、20

14

30

 

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