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KOBA-check® Sphere Plate

KOBA-check sphere plate shown with optional probe test unit

Characteristics of the KOBA-check Sphere Plate

Short-Term Stability

Long-Term Stability

Probe test unit and vertical position of the ring gage

Contact Elements of the Sphere Plate

Accessibility of the Contact Elements

Handling

Construction

Calibration

Required Time for Monitoring

KOBA-check sphere plate in vertical position with adapter plate and additional lateral support

Technical Data

Spheres

Number of Spheres: 25
Sphere Diameter: 22µm
Sphericity <0.3µm
Material: AI2O3
Hardness: > 1650 HV
Coefficient of Thermal Expansion: a = 11.5 x 10-6 K-1

Plate Body

Material: Gage steel, treated against surface corrosion
Coefficient of Thermal Expansion: a = 11.5 x 10-6 K-1

Ring Gage

Coefficient of Thermal Expansion: a = 11.5 x 10-6 K-1
Dimensional Variations: < 0.5µm
< 0.3µm on request (extra charge)

Probe Test Sphere

Coefficient of Thermal Expansion: a = 11.5 x 10-6 K-1
Dimensional Variation: < 0.15µm
Hardness: > 1650 HV
KOBA-check 620 sphere plate in user

Ranges Supplied

Size: 620 420 320 230
Dimensions 620x620x24mm 420x420x24mm 320x320x24mm 230x230x24mm
Weight 28kg 18kg 11kg 9kg
Max. Sphere Gage 532mm 332mm 240mm 150mm
Nr. of Spheres 25 25 25 9

Data Analysis Software

Evaluation software is available for all artifacts, read more about our available software here...

Applicable SIC Codes: 3423, 3545, 5049, 5084
Applicable NAICS Codes: 332212, 333515, 423490, 423830