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Точный и откалиброванный вал

Products specification

Gauge and precise shaft
Material
Tungsten Carbide
Ceramics
Grass
We manufacture precision shafts as per customers' own drawings, sample or specifications from Tungsten Carbide, Ceramics
etc ultra-hard materials.

Applications
Gauge spindle
Facilities

Precise shaft

Sapphire main feature

Specification Diameter(mm) Length(mm) Dia tolerance(mm) Surface Quality(μm)
Fine Grinding Φ0.3~10 1~100 0.0025 0.10
Polishing Φ0.3~10 1~100 0.01 0.02

Physical Crystal structure Hexagonal single
Composition

Al2O3

Purity

99.996%

Dislocation density

3.99

Thermal Melting point

2320 K

Thermal conductivity

40 W/m·K  ┷ at 300 K

Thermal expansion

6.2·10-6/K∥ C-axis
6.2·10-6/K∥ C-axis

Mechanical properties Hardness

Mohs 9
Knoop 2200 face∥C—axis
Knoop 1800 face ┷ C—axis

Young's modulus

4.4·10 11 Pa at 300 K

Compressive strength

2.1·1 0 9 Pa at 300 K

Poisson's constant

1.9·10 8 Pa at 300 K

Chemical properties Acids and alkalis attack

0 at 570 K

Electrical properties Dielectric constant

7.4 ~ 10.6

Electrical resistance

10 9Ω·m at 770 K
10 4 Ω·m at 1270 K
10Ω·m at 2270 K

Optical properties Refractive index
Nd at 0.589μm

1.760 face C-axis

Transmission range

0.15-5.5μm

Specification Diameter(mm) Length(mm) Dia tolerance(mm) Surface Quality(μm)
Fine Grinding Φ0.3~10 1~100 0.0025 0.10
Polishing Φ0.3~10 1~100 0.01 0.02

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