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Robert Charles DIN 3 Flute Countersink 100° - 31.0mm Head Diameter
| Head Diameter | 31.0 |
| Small Diameter | 4.2 |
| Shank Diameter | 12 |
| Overall Length | 71 |
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Description
The Robert Charles DIN 3 Flute Countersink 100° is a precision cutting tool engineered to DIN standards for accurate 100° countersinking and chamfering. With a 31.0 mm head diameter, it delivers a robust, stable cutting profile suitable for steel, aluminium, and plastics—making it a dependable choice for engineers, workshops, and production teams focused on clean, repeatable finishes.
- DIN 100° precision geometry: Delivers consistent countersinks and chamfers across parts, reducing dimensional variation and rework.
- 3-flute design for smooth cutting: Provides stable engagement with the workpiece, minimizes chatter, and enables efficient chip removal for a cleaner finish.
- Versatile material compatibility: Effective on steel, aluminium, and plastics, letting you complete mixed-material assemblies without tool changes.
This countersink helps you speed up setup, cut accurate bevels in a single pass, and achieve uniform surface quality across components. Its DIN-compliant geometry and reliable performance reduce downtime and deliver repeatable results, making it a trusted choice for both high-volume production and precise, hands-on projects.
Part Numbers
- Protool Part Number
- 335C-31.0-100
- 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 DIN 3 Flute Countersinks 100°
View full collection →You are viewing 335C-31.0-100. Click any other SKU to view its full details.
| Product SKU | Head Diameter | Small Diameter | Shank Diameter | Overall Length | Head Length | Angle | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|---|
| 335C-6.3-100 | 6.3 | 1.5 | 5 | 45 | 5 | 100 | £30.02 | 2-3 days | |
| 335C-8.3-100 | 8.3 | 2 | 6 | 50 | 6 | 100 | £31.60 | 2-3 days | |
| 335C10-4-100 | 10.4 | 2.5 | 6 | 50 | 7.1 | 100 | £34.76 | 2-3 days | |
| 335C-12.4-100 | 12.4 | 2.8 | 8 | 56 | 8 | 100 | £37.92 | 2-3 days | |
| 335C-16.5-100 | 16.5 | 3.2 | 10 | 60 | 10 | 100 | £50.56 | 2-3 days | |
| 335C-20.5-100 | 20.5 | 3.5 | 10 | 63 | 12.5 | 100 | £69.52 | 2-3 days | |
| 335C-25.0-100 | 25.0 | 3.8 | 10 | 67 | 15 | 100 | £88.48 | 2-3 days | |
| 335C-30-100 | 30.0 | 4.2 | 12 | 71 | 18 | 100 | £154.84 | 2-3 days | |
| 335C-31.0-100 Viewing | 31.0 | 4.2 | 12 | 71 | 18 | 100 | £154.84 | 2-3 days |
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