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ITP Straight Styli - Type A - Ruby Ball - M4 Thread x 53mm Overall Length - TCM406007053
| Styli Type | Type A |
| Thread Size | M4 |
| Ball Diameter (DK) | 6 |
| Overall Length (L) | 53 |
| Shank Diameter (DG) | 7 |
| Measuring Length (ML) | 36.5 |
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The ITP Straight Stylus Type A with Ruby Ball is a high‑precision probing tool designed for long‑reach metrology. It targets professionals using CMMs and tactile probes who need a light, exceptionally rigid stylus that delivers repeatable, reliable contact.
- Material: Carbon fibre stem for exceptional rigidity with minimal weight, optimizing dynamic response during measurements.
- Ball Diameter: High‑quality ruby ball available in sizes from Ø3.0 mm to Ø12.0 mm for durable, precise contact.
- Thread: M4 mounting thread for secure compatibility with standard probes.
- Overall Length: 53 mm total length, providing extended reach while preserving stiffness and accuracy.
- Design: Straight profile minimizes deflection and maintains consistent contact geometry across measurement passes.
- Customization: Other dimensions can be requested via the configurator or by email to tailor the stylus to your setup.
This combination of a lightweight carbon fibre stem and a hard ruby contact supports precise, repeatable measurements in challenging geometries. The extended reach is ideal for accessing recessed features or tight cavities, while the ruby ball offers durable performance across repeated cycles. Use the Type A ruby‑ball stylus for metrology tasks that demand stable contact, low mass at the tip, and consistent tactile feedback throughout your inspection or scanning workflow.
| Styli Type | Type A |
| Thread Size | M4 |
| Ball Diameter (DK) | 6 |
| Overall Length (L) | 53 |
| Shank Diameter (DG) | 7 |
| Measuring Length (ML) | 36.5 |
| Neck Diameter (DS) | 4.5 |
| Stem Material | carbon fiber |
| Base Material | stainless steel |
| Prob Ball Material | ruby |
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.


