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Product Specifications

Ruby ball
Material

Synthetic ruby monocrystal Al2O3

Form tolerance

according to ISO 3290 Grade 10 0,25 µm

Diameter tolerance

according to ISO 3290 Grade 10 0,25 µm

Roughness

according to ISO 3290 Grade 10 0,025 µm

Hardness

-1800 Vickers

Density

3,99 g/cm3

Product specification styli
  1. Thread M2/M3/M4/M5
  2. Assembly Hole
  3. Stem, material
    • Carbide / Carbide tube
    • Ceramic
    • Stainless steel
    • Carbon fiber
    • Titanium tube
  4. Ruby ball
  5. Assembling by peg-mounting
Material Hardness Density
Titanium

3.7035 Grade 2

-150 Brinell

4,5 g/cm3

Stainless steel

1.4305

-300 Vickers

7,95 g/cm3

Carbide

DK 120

-1700 Vickers

15,0 g/cm3

Ceramic

Alsint 99,7

9 Mohs

3,85 g/cm3

Carbon fiber

Elasticity > 450 GPa CTE (Coefficient of thermal expansion) -1,3 ± 0,2 x 10-6 1/K

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