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Robert Charles Piloted Microstop Countersink - Removable Pilot - Threaded Shank - 5/16 Pilot Dia - 5mm Pilot Shank Dia - 90°
| Pilot Diameter | 5/16 |
| Pilot Shank Diameter | 5 |
| Inclusive Angle | 90 |
| Cutter Diameter | 17.00 |
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Description
The Robert Charles Piloted Microstop Countersink – Removable Pilot – Threaded Shank is a precision countersinking tool engineered for highly accurate depth control and repeatable results in aerospace, engineering, and precision assembly. It features a removable pilot and a threaded shank for easy pilot replacement and a secure, alignment-focused fit, with a 5/16-inch pilot diameter and a 5 mm pilot shank diameter to accommodate multiple hole sizes while maintaining strict alignment.
- Removable Pilot for Flexible, Fast Tooling: Swap pilots quickly to fit different hole sizes without removing the tool from the machine, keeping alignment consistent and reducing downtime.
- Threaded Shank for Secure, Repeatable Alignment: The threaded connection into compatible microstop cages provides a stable, slip‑free setup for repeatable countersink depth across multiple parts.
- 90° Countersink with Durable Construction: Designed for clean, uniform chamfers across a variety of materials, delivering consistent finishes and long tool life in demanding applications.
This countersink is built to support tight tolerances and reliable performance across aerospace, engineering, and precision assembly workflows. The combination of a removable pilot, secure threaded shank, and robust 90° geometry helps you reduce setup time, minimize rework, and achieve dependable, high-quality finishes every run.
Part Numbers
- Protool Part Number
- D7.94-90-17
- Brand
- Robert Charles
- Category
- Countersinks
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.
Full Range: Robert Charles Piloted Microstop Countersink - Removable Pilot - Threaded Shank
View full collection →You are viewing D7.94-90-17. Click any other SKU to view its full details.
| Product SKU | Pilot Diameter | Pilot Shank Diameter | Inclusive Angle | Cutter Diameter | Number of Flutes | Thread | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|---|
| D2.38-90-10 | 3/32 | 2.3 | 90 | 10.00 | 2 | M6X1 | £47.40 | 2-3 days | |
| D3.17-90-10 | 1/8 | 2.5 | 90 | 10.00 | 2 | M6X1 | £47.40 | 2-3 days | |
| D3.96-90-10 | 5/32 | 3.5 | 90 | 10.00 | 2 | M6X1 | £47.40 | 2-3 days | |
| D4.76-90-10 | 3/16 | 3.5 | 90 | 10.00 | 2 | M6X1 | £47.40 | 2-3 days | |
| D4.76-90-14 | 3/16 | 4 | 90 | 14.00 | 2 | M8X1 | £59.25 | 2-3 days | |
| D6.35-90-14 | 1/4 | 4 | 90 | 14.00 | 2 | M8X1 | £59.25 | 2-3 days | |
| D7.94-90-17 Viewing | 5/16 | 5 | 90 | 17.00 | 3 | M8X1 | £74.26 | 2-3 days | |
| D9.52-90-21 | 3/8 | 5 | 90 | 21.00 | 3 | M8X1 | £79.00 | 2-3 days | |
| D2.38-100-10 | 3/32 | 2 | 100 | 10.00 | 2 | M6X1 | £39.50 | 2-3 days | |
| D3.17-100-10 | 1/8 | 2.5 | 100 | 10.00 | 2 | M6X1 | £39.50 | 2-3 days | |
| D3.96-100-10 | 5/32 | 3.5 | 100 | 10.00 | 2 | M6X1 | £39.50 | 2-3 days | |
| D4.76-100-10 | 3/16 | 3.5 | 100 | 10.00 | 2 | M6X1 | £39.50 | 2-3 days | |
| D4.76-100-14 | 3/16 | 4 | 100 | 14.00 | 2 | M8X1 | £50.56 | 2-3 days | |
| D6.35-100-14 | 1/4 | 4 | 100 | 14.00 | 2 | M8X1 | £50.56 | 2-3 days | |
| D7.94-100-17 | 5/16 | 5 | 100 | 17.00 | 3 | M8X1 | £66.36 | 2-3 days | |
| D9.52-100-21 | 3/8 | 5 | 100 | 21.00 | 3 | M8X1 | £72.68 | 2-3 days | |
| D2.38-120-10 | 3/32 | 2 | 120 | 10.00 | 2 | M6X1 | £47.40 | 2-3 days | |
| D3.17-120-10 | 1/8 | 2.5 | 120 | 10.00 | 2 | M6X1 | £47.40 | 2-3 days | |
| D3.96-120-10 | 5/32 | 3.5 | 120 | 10.00 | 2 | M6X1 | £47.40 | 2-3 days | |
| D4.76-120-10 | 3/16 | 3.5 | 120 | 10.00 | 2 | M6X1 | £47.40 | 2-3 days | |
| D4.76-120-14 | 3/16 | 4 | 120 | 14.00 | 2 | M8X1 | £58.46 | 2-3 days | |
| D6.35-120-14 | 1/4 | 4 | 120 | 14.00 | 2 | M8X1 | £58.46 | 2-3 days | |
| D7.94-120-17 | 5/16 | 5 | 120 | 17.00 | 3 | M8X1 | £74.26 | 2-3 days | |
| D9.52-120-21 | 3/8 | 5 | 120 | 21.00 | 3 | M8X1 | £79.00 | 2-3 days |
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