Welcome to the NEW itpstyli website. You’ve arrived at the right place!

Precision and Quality Specified

itp uses only the highest precision, highest quality spheres available in the range of Grade 3 to Grade 5
Ruby spheres Ceramic spheres Silicon nitride spheres Zirconia oxide spheres
Material

Synthetic ruby
monocrystal
Al2O3

Aluminum oxide
polycrystal
>99,9 Al2O3

Silicon nitride
polycrystal
SI3N4

Zirconia oxide
ZrO2
polycrystal

Form deviation¹

0,08µm - 0,13µm

0,08µm - 0,13µm

0,08µm - 0,13µm

0,08µm - 0,13µm

Diameter deviation

0,08µm - 0,13µm

0,08µm - 0,13µm

0,08µm - 0,13µm

0,08µm - 0,13µm

Roughness Ra

0,007µm - 0,008µm

0,007µm - 0,008µm

0,004µm - 0,005µm

0,007µm - 0,008µm

Hardness

2400 Vickers

2100 Vickers

1600 Vickers

1200 Vickers

Density

3,99 g/cm3

3,85 g/cm3

3,20 g/cm3

6,05 g/cm3

Thermal expansion

5,4•10-6K-1

8,8•10-6K-1

2,9•10-6K-1

10,5•10-6K-1

Compression strength (MPa)

2100

3800

3000

2000

Bending strength (MPa)

400

470

>1000

700 - 1100

Fracture toughness (MN/m3/2)

1

4

>6,5

10

* As per DIN 5401 ISO 3290 & AFBMA 3290, Sphere Standards
¹ From AFBNA Grade 3 to Grade 5
Material Hardness Density
Titanium

3,7035 Grade 2

150 Brinell

4,5 g/cm3

Stainless Steel

1,4305

300 Vickers

7,95 g/cm3

Tungsten Carbide

DK 120

1700 Vickers

15,0 g/cm3

Ceramic

Alsint 99,7

9 nach Mohs

3,85 g/cm3

Carbon Fiber

Bending strength > 450 GPa CTE (Coefficient of thermal expansion) -0,4 x 10-61/K

itpstyli drawing map
DK
Sphere diameter. Drilled sphere peg mounted for all diameters starting from 0,5 until 30,0 mm.
DS
Stem diameter
Stem material
  • Carbide / Carbide tube
  • Ceramic
  • Stainless Steel
  • Carbon Fiber
  • Titanium tube
DG
Base
Thread M2 - M6
  • M2 = 3 mm
  • M3 = 4 mm
  • M4 = 7 mm
  • M5 = 10 mm compatible Renishaw
  • M5 = 11 mm compatible Zeiss
  • M5 = 12 mm compatible Leitz
  • M6 = 16 mm
ML
Measuring length
L
Total length