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Robert Charles Single Flute Countersink 90° - M35-HSS-E 5% Cobalt - Metric - 10.mm Head Dia
| Head Diameter | 10. |
| Shank Diameter | 6 |
| Overall Length | 45 |
| Shank Length | 32.0 |
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Description
The Robert Charles Single Flute Countersink 90° (Metric) is a precision cutting tool designed for accurate countersinking, chamfering, and deburring of metric holes. It’s built for engineers, machinists, fabricators, and DIY enthusiasts who need clean edge finishes and dependable performance in a variety of materials. This countersink delivers consistent depth and smooth chamfers, making setup quick and predictable.
Crafted from premium M35 HSS-E with 5% cobalt, this tool combines high hardness with excellent heat resistance to extend tool life even under demanding cutting. The cobalt-enhanced steel holds a sharp edge longer than standard high-speed steel, enabling reliable performance on stainless steel, alloy steels, and non-ferrous metals without frequent re-sharpening.
- Premium M35 HSS-E with 5% Cobalt: Delivers superior hardness and heat tolerance for longer edge life and consistent performance on tough materials like stainless steel and alloy steels.
- 90° single-flute geometry: Ensures fast, precise countersinking with a clean chamfer and minimal chatter for a smooth, repeatable finish.
- 10 mm head diameter for stable cuts: Provides robust guidance and reduces deflection, yielding uniform chamfers across a range of hole sizes.
This countersink helps you complete hole prep efficiently, reduces deburring time, and delivers repeatable, professional results across metalworking tasks. With its durable cobalt-enhanced steel and precise geometry, you can rely on steady performance, fewer tool changes, and a dependable finish from project to project.
Part Numbers
- Protool Part Number
- 5890-10.0-90
- 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 Single Flute Countersink 90° - M35-HSS-E 5% Cobalt - Metric
View full collection →You are viewing 5890-10.0-90. Click any other SKU to view its full details.
| Product SKU | Head Diameter | Shank Diameter | Overall Length | Shank Length | Inclusive Angle | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|
| 5890-4.0-90 | 4.0 | 4 | 44 | 36.0 | 90 | £26.07 | 2-3 days | |
| 5890-6.0-90 | 6.0 | 5 | 45 | 36.0 | 90 | £26.07 | 2-3 days | |
| 5890-8.0-90 | 8.0 | 6 | 45 | 32.0 | 90 | £26.86 | 2-3 days | |
| 5890-10.0-90 Viewing | 10. | 6 | 45 | 32.0 | 90 | £27.65 | 2-3 days | |
| 5890-12.5-90 | 12.5 | 8 | 48 | 32.0 | 90 | £32.39 | 2-3 days | |
| 5890-14.0-90 | 14.0 | 8 | 48 | 30.5 | 90 | £36.34 | 2-3 days | |
| 5890-16.0-90 | 16.0 | 10 | 56 | 36.0 | 90 | £41.08 | 2-3 days | |
| 5890-21.0-90 | 21.0 | 10 | 65 | 37.5 | 90 | £53.72 | 2-3 days | |
| 5890-25.0-90 | 25.0 | 10 | 65 | 36.0 | 90 | £72.68 | 2-3 days | |
| 5890-28.0-90 | 28 | 12 | 85 | 48 | 90 | £126.40 | 2-3 days | |
| 5890-35.0-90 | 35 | 15 | 102 | 56.5 | 90 | £213.30 | 2-3 days |
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