Reference Spheres for CMM Probe Calibration
itpstyli offers 4 standard reference calibration spheres with an overall length ranging from 130 to 145 mm and 4 standard sphere diameters between 15 and 30 mm. Achieving flawless precision starts with calibration spheres from itpstyli. Designed with meticulous attention to quality, these tools ensure your measurements maintain the highest standards of accuracy. Each CMM calibration sphere is crafted for reliability and seamless calibration processes. Whether you depend on a CMM calibration ball to fine-tune your equipment or compatibility with CMM stylus probes, itpstyli’s products deliver unmatched performance.
Meeting the demands of precise metrology, these calibration spheres promise consistent accuracy for even the most intricate applications. Trust itpstyli to provide the tools your work depends on with a commitment to exceptional quality every step of the way. Standard thread size is M8. If your plate or granite requires other threading, please see our adapters or consider our cost-effective customized solution. Spheres come with a DIN EN ISO 9001-2000 certification depicting diameter and form deviation.

Part Number | DK | L | DG D | SW | Price |
---|---|---|---|---|---|
KN M8 150 24 130 |
15 |
130.0 |
24.0 |
22.0 |
245.00 |
KN M8 200 24 135 |
20.0 |
135.0 |
24.0 |
22.0 |
298.00 |
KN M8 250 24 140 |
25.0 |
140.0 |
24.0 |
22.0 |
328.00 |
KN M8 300 24 145 |
30.0 |
145.0 |
24.0 |
22.0 |
349.00 |


Each Calibration sphere comes with a certification document as per DIN EN ISO 9001-2000 which provides measurement uncertainties to the sub-micron level. The certification serial number is engraved onto the stem of the reference sphere assembly. An example of the certification is shown to the left. If a traceable certification is required, please call and we will provide a quotation for obtaining.

The 45° stainless steel base with its aggressive magnet provides location flexibility and application convenience without compromising rigidity and calibration accuracy. To order, please click on the part number in the table below.
Part Number | Body Material | Price |
---|---|---|
MAGNETFUSS KNM8 |
Stainless Steel |
278.00 |


The standard thread base for all our reference spheres come with an M8 external thread. These robust adapters (24 mm diameter by 29 and 30 mm long) can be used to accommodate the less common M6 and M10 threaded CMM and fixturing surfaces. The adapter (and reference sphere) has wrench flats to tighten into place. For thread options other than M6, M8 and M10, please call for a quote on a customized adapter.
Part Number | Description | Length | Price |
---|---|---|---|
S RI M6 800 24 029 |
M6 External to M8 Internal |
29.0 |
124.00 |
S RI M10 M8 24 030 |
M10 External to M8 Internal |
30.0 |
124.00 |