Textile Machine Parts: Jump wire preventer part/caged wire jump preventer/caged ceramic pulley
Specifications
Wire Jump Preventer is to prevent the wire jumping out from it is route.
The precision ceramics circle inside has an ultra-fine polishing degree Ra0.2.
There is a high-speed bearing in this porcelain circlewhich can control the sliding distance between enameled wire and the circle under 0.2mm protect the film and assure the beating of the enameled wire
in a very small scope to stabilized the tension.
Production Description:
1, Material: 99%AL2O3.
Hardness: HRA88.
Line roughness: Fine polishing above Ra0.2.
Color: Pink.
2, Original Japanese high speed bearing.
| Name |
Unit |
Slim |
|
|
| Material |
|
Al2O3 95%-97% |
Al2O3 99% |
Al2O3 99.7% |
| Density |
g/cm3 |
3.7 |
3.85 |
3.9 |
| Flexural Strength |
Mpa |
300 |
340 |
390 |
| Compressive Strength |
Mpa |
3400 |
3600 |
3900 |
| Modulus of Elasticity |
Gpa |
350 |
380 |
390 |
| Impact Resistance |
Mpa m 1/2 |
4.0 |
5 |
5.2 |
| Waybill Modulus |
m |
10.0 |
10 |
12 |
| Vickers Hardness |
HV0.5 |
1800.0 |
1900 |
2000 |
| Thermal Expansion Coefficient |
10 -6 K -1 |
5.0-8.3 |
5.4-8.3 |
5.5-8.4 |
| Thermal Conductivity |
W/mK |
24 |
27 |
28 |
| Thermal Resistance |
T°C |
250 |
270 |
280 |
| Maximum Use Temperature |
°C |
1600 |
1650 |
1700 |
| Volume Resistivity at 20°C |
Ω |
≥10 14 |
≥10 14 |
≥10 15 |
| Dielectric Constant |
KV/mm |
20 |
25 |
30 |
| Open Porosity |
% |
0 |
0 |
0 |
| Dielectric Constant |
ξr |
10 |
10 |
10 |
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