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ITP Calibration Sphere ceramic Ball Material - M8 x 15mm Ball Diameter
| Thread Size | M8 |
| Ball Diameter (DK) | 15 |
| Overall Length (L) | 130 |
| SW | 22 |
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Description
ITP Calibration Sphere is a precision ceramic reference ball crafted for metrology professionals who calibrate measuring probes and fixtures. With a 15 mm ball diameter and an M8 mounting thread, it provides a reliable, repeatable reference for probe calibration.
- Ball diameter: 15 mm precision sphere designed for consistent contact and repeatable measurements.
- Thread size: M8 threaded stud for secure, quick attachment to probes and fixtures.
- Material: Aluminum oxide (ceramic) offering high hardness, wear resistance, and stable performance.
- Finish: Precisely machined surface to minimize contact deviation during calibration.
- Certification: Supplied with a factory certificate that documents dimensions and material for traceability.
- Applications: Ideal for calibrating measuring probes, reference checks in metrology labs, and fixture-based calibration setups.
Using this ceramic calibration sphere provides a stable, wear-resistant reference that helps reduce measurement uncertainty and maintain probe accuracy over time. The included factory certificate supports traceability and quality-control documentation, while the M8 mounting thread enables straightforward integration into existing calibration fixtures, helping you streamline routine calibrations and minimize downtime.
Part Numbers
- Protool Part Number
- ITP-KNM815024130
- Brand
- ITP
- Category
- Styli
Need cutting data? Call 01732 887334 or email sales@protool-ltd.co.uk.
Delivery
Free UK mainland delivery on orders over £50 ex VAT. In-stock items ordered before 4:30pm are dispatched the same working day. Full delivery information.
Returns
14-day returns on unused stock items in original packaging. Special-order and bespoke tooling is non-returnable. Read our returns policy.
Technical Support
Over 30 years of machining experience behind the counter. Call 01732 887334, Mon–Thurs 8:30–17:30, Fri 8:30–16:30.
Trade Accounts
Credit accounts, contract pricing and scheduled call-off orders available for trade customers. Apply for an account.
What time are Protool open?
We are open Monday to Friday between 8:30am and 5pm.
Do you offer Free Next Day delivery?
Yes! We offer Free Next Day delivery via Royal Mail Tracked 24 on all orders over £50 ex VAT*. We also offer Free DPD Local Next Day delivery on all orders over £100 ex VAT*.
We also offer the following:
- Royal Mail Tracked 24 — £5.90 (FREE on orders over £50 ex VAT*). Order before 4:30pm for next day delivery. No signature required.
- DPD Local Next Day — £8.00 (FREE on orders over £100 ex VAT*). Standard next day delivery to UK mainland addresses.
- Royal Mail Special Delivery — £12.50. Guaranteed delivery before 1pm the next working day.
- DPD Saturday Delivery — £25.00. Must be ordered on Friday before 4pm. Pre-12pm delivery.
For delivery to Scottish Highlands & Islands, Northern Ireland, Republic of Ireland, or overseas locations, additional charges apply. Please see our delivery page for full details, or call us on 01732 887 334.
*T's & C's and exclusions apply. Please see our delivery page for more information on all our services.


