Ceramic standard balls are manufactured from ZrO2 and Si3N4. The diameters range of balls from 3 to 30mm and roundness is 0.08μm, can be used for reference ball and measuring ball of the CMM. Extraordinary, these hollow balls fix easy and reliable.

★ Good corrosion resistance, chemical reagent will not cause damage to it, can bebarehanded inuse  without anti rust treatment, for research of gauge block can be placed for a long time. In addition in the custody also does not need special treatment.
★The material of high hardness, abrasion resistance, service life is 5-10 times the steelgauge block is 4-5 times, hard alloy gauge.
★The material has good stability, no change, it can prolong the period of verification.
★The material is fine, smooth surface, grinding force, high precision.
★Linear expansion coefficient and common steel materials are similar, can replace the metalblock, and measuring the length of steel and iron products without temperature correction.
★ Mark using the most advanced laser engraving technology, pulse penetration, legibility,never fade.

DIAMETER:  2mm, 3mm, 4mm,  5mm, 6mm, 8mm, 10mm, 19.05mm(0.75inch), 20mm, 25mm,  25.4mm(1inch), 30mm,   31.75mm(1.5inch)