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ITP Straight Styli - Type A - Ruby Ball - M3 Thread x 50mm Overall Length - THM305004050

SKU:ITP-THM305004050

Precision straight stylus for metrology and inspection professionals. The Type A Ruby Ball version combines a rigid carbide stem with a durable ruby ball for reliable, everyday probing. Thread: ... Read more ↓
Styli TypeType A
Thread SizeM3
Ball Diameter (DK)5
Overall Length (L)50
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£69.14
Prices shown ex. VAT
5 days estimated lead time — subject to availability
Free delivery over £50 ex VAT
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14-day returns
30+ years expertise
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01732 887334
Mon – Thurs 8:30 – 17:30 · Fri 8:30 – 16:30

Description

Precision straight stylus for metrology and inspection professionals. The Type A Ruby Ball version combines a rigid carbide stem with a durable ruby ball for reliable, everyday probing.

  • Thread: M3 thread compatible with standard probe housings.
  • Overall Length: 50 mm total length for versatile reach in common fixtures.
  • Stem Material: Carbide stem delivers exceptional rigidity and minimizes deflection during probing.
  • Ball Diameter Range: High-quality ruby balls available from Ø0.5 mm to Ø6.0 mm for precise contact.
  • Geometry: Straight configuration optimized for routine probing, scanning, and edge measurements.
  • Customization: Additional ruby ball diameters can be requested via the configurator or by email.

By pairing a stiff carbide stem with a durable ruby contact surface, this stylus provides repeatable measurements with reduced wear and longer tool life. The 50 mm reach fits a wide range of fixtures and probe setups, while the M3 threading ensures a secure, stable connection during high-precision tasks. If your application calls for different ball sizes, you can request other diameters to tailor the stylus to microfeatures, fine edges, or larger surface scans.

Part Numbers

Protool Part Number
ITP-THM305004050
Brand
ITP
Category
Styli
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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.

Ask our technical team about this tool

Not sure if this is the right tool for your job? Ask us about speeds and feeds, material suitability, holders or alternatives — 30+ years of machining experience on the other end.

Prefer to talk? Call 01732 887334 — Mon–Thurs 8:30–17:30, Fri 8:30–16:30.