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Widin Carbide Corner Radius End Mill - 2 Flute Tapered Neck Type - 0.4mm x 4mm xR0.5
| Cutter Diameter | 0.4 |
| Number of Flutes | 2 |
| Flute Length | 0.3 |
| Overall Length | 50 |
| Shank Diameter | 4 |
| Reach | 4 |
Learn more about Klarna
The Widin Carbide Corner Radius End Mill is a precision cutting tool designed for micro-machining tasks that demand exact corner radii, deep grooves, and carefully sloped surfaces. Built for engineers, hobbyists, and shops seeking reliable accuracy, it features a tapered neck to boost stability across challenging cuts.

- Diameter: 0.4 mm cutting diameter for precise, fine-detail milling
- Neck Type: Tapered neck design to reduce vibration and chatter during operation
- Neck Length: 4 mm reach for deeper grooves and tighter geometries
- Corner Radius: R0.5 mm corner radius for clean, accurate fillets
- Flute Count: 2-flute geometry balances material removal with a smooth finish
- Material: Solid carbide for exceptional hardness and wear resistance
- Application Focus: Optimized for deep grooves and sloped surfaces with reinforced corner-radius integrity
The combination of a small 0.4 mm cutting diameter and a durable carbide construction enables high-precision work in tight spaces, from intricate pocketing to precise filleting on challenging materials. The tapered neck reduces tool vibration and chatter, preserving both surface quality and dimensional accuracy over longer cutting sequences. The reinforced corner radius helps resist chipping at delicate corners, delivering consistent passes and predictable results across multiple operations. Whether you're finishing microfeatures on a precision housing, shaping tight fillets on a miniature component, or carving recessed grooves, this end mill provides the stability and control you need to achieve reliable, repeatable results.
| Cutter Diameter | 0.4 |
| Number of Flutes | 2 |
| Flute Length | 0.3 |
| Overall Length | 50 |
| Shank Diameter | 4 |
| Reach | 4 |
| Corner Radius | 0.5 |
| Neck Diameter | 0.37 |
| Taper Angle | 0.9° |
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: Widin Carbide Corner Radius End Mill - 2 Flute Tapered Neck Type (ZSTNR)
View full collection →You are viewing ESTNR2004-4-09005. Click any other SKU to view its full details.
| Product SKU | Cutter Diameter | Number of Flutes | Flute Length | Overall Length | Shank Diameter | Reach | Corner Radius | Neck Diameter | Taper Angle | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ESTNR2002-2-09005 | 0.2 | 2 | 0.15 | 50 | 4 | 2 | 0.5 | 0.17 | 0.9° | £85.07 | 5 days | |
| ESTNR2005-10-0901 | 0.5 | 2 | 0.35 | 50 | 4 | 5 | 0.1 | 0.47 | 0.9° | £55.24 | 5 days | |
| ESTNR2004-4-0901 | 0.4 | 2 | 0.3 | 50 | 4 | 5 | 0.5 | 0.37 | 0.9° | £64.08 | 5 days | |
| ESTNR2004-4-09005 Viewing | 0.4 | 2 | 0.3 | 50 | 4 | 4 | 0.5 | 0.37 | 0.9° | £64.08 | 5 days | |
| ESTNR2004-5-09005 | 0.4 | 2 | 0.3 | 50 | 4 | 4 | 0.1 | 0.37 | 0.9° | £67.39 | 5 days | |
| ESTNR2004-5-0901 | 0.4 | 2 | 0.3 | 50 | 4 | 5 | 0.1 | 0.37 | 0.9° | £67.39 | 5 days | |
| ESTNR2005-5-0901 | 0.5 | 2 | 0.35 | 50 | 4 | 8 | 0.1 | 0.47 | 0.9° | £50.82 | 5 days | |
| ESTNR2006-12-0901 | 0.6 | 2 | 0.4 | 55 | 4 | 12 | 0.1 | 0.57 | 0.9° | £55.24 | 5 days | |
| ESTNR2005-8-0901 | 0.5 | 2 | 0.35 | 55 | 4 | 10 | 0.1 | 0.47 | 0.9° | £53.03 | 5 days | |
| ESTNR2006-15-0901 | 0.6 | 2 | 0.4 | 55 | 4 | 15 | 0.1 | 0.57 | 0.9° | £58.55 | 5 days | |
| ESTNR2008-12-0902 | 0.8 | 2 | 0.5 | 50 | 4 | 6 | 0.2 | 0.77 | 0.4° | £55.24 | 5 days | |
| ESTNR2008-6-0402 | 0.8 | 2 | 0.5 | 55 | 4 | 12 | 0.2 | 0.77 | 0.9° | £50.82 | 5 days | |
| ESTNR2010-10-0902 | 1 | 2 | 0.8 | 55 | 4 | 8 | 0.2 | 0.94 | 0.4° | £48.87 | 5 days | |
| ESTNR2010-15-0902 | 1 | 2 | 0.8 | 55 | 4 | 10 | 0.2 | 0.94 | 0.9° | £48.87 | 5 days | |
| ESTNR2010-15-0903 | 1 | 2 | 0.8 | 60 | 4 | 15 | 0.2 | 0.94 | 0.9° | £48.87 | 5 days | |
| ESTNR2010-20-0902 | 1 | 2 | 0.8 | 65 | 4 | 20 | 0.2 | 0.94 | 0.9° | £52.27 | 5 days | |
| ESTNR2010-30-0902 | 1 | 2 | 0.8 | 80 | 4 | 35 | 0.2 | 0.94 | 0.9° | £54.54 | 5 days | |
| ESTNR2010-25-0902 | 1 | 2 | 0.8 | 70 | 4 | 25 | 0.2 | 0.94 | 0.9° | £52.27 | 5 days | |
| ESTNR2010-25-0903 | 1 | 2 | 0.8 | 75 | 4 | 30 | 0.2 | 0.94 | 0.9° | £52.27 | 5 days | |
| ESTNR2010-30-0903 | 1 | 2 | 0.8 | 55 | 4 | 8 | 0.3 | 0.94 | 0.4° | £54.54 | 5 days | |
| ESTNR2010-35-0902 | 1 | 2 | 0.8 | 60 | 4 | 15 | 0.3 | 0.94 | 0.9° | £56.82 | 5 days | |
| ESTNR2010-8-0403 | 1 | 2 | 0.8 | 75 | 4 | 30 | 0.3 | 0.94 | 0.9° | £48.87 | 5 days | |
| ESTNR2010-8-0402 | 1 | 2 | 0.8 | 70 | 4 | 25 | 0.3 | 0.94 | 0.9° | £48.87 | 5 days | |
| ESTNR2015-25-0902 | 1.5 | 2 | 1.35 | 55 | 6 | 10 | 0.3 | 1.42 | 0.4° | £52.27 | 5 days | |
| ESTNR2015-10-0402 | 1.5 | 2 | 1.35 | 55 | 6 | 10 | 0.2 | 1.42 | 0.4° | £48.87 | 5 days | |
| ESTNR2015-20-0903 | 1.5 | 2 | 1.35 | 75 | 6 | 30 | 0.2 | 1.42 | 0.9° | £52.27 | 5 days | |
| ESTNR2015-15-0902 | 1.5 | 2 | 1.35 | 65 | 6 | 20 | 0.2 | 1.42 | 0.9° | £48.87 | 5 days | |
| ESTNR2015-10-0403 | 1.5 | 2 | 1.35 | 60 | 6 | 15 | 0.2 | 1.42 | 0.9° | £48.87 | 5 days | |
| ESTNR2015-20-0902 | 1.5 | 2 | 1.35 | 70 | 6 | 25 | 0.2 | 1.42 | 0.9° | £52.27 | 5 days | |
| ESTNR2015-25-0903 | 1.5 | 2 | 1.35 | 65 | 6 | 20 | 0.3 | 1.42 | 0.9° | £52.27 | 5 days | |
| ESTNR2015-30-0903 | 1.5 | 2 | 1.35 | 75 | 6 | 30 | 0.3 | 1.42 | 0.9° | £54.54 | 5 days | |
| ESTNR2015-30-0902 | 1.5 | 2 | 1.35 | 70 | 6 | 25 | 0.3 | 1.42 | 0.9° | £54.54 | 5 days | |
| ESTNR2020-12-0403 | 2 | 2 | 1.7 | 70 | 6 | 30 | 0.2 | 1.92 | 0.9° | £48.87 | 5 days | |
| ESTNR2020-20-0905 | 2 | 2 | 1.7 | 65 | 6 | 20 | 0.3 | 1.92 | 0.9° | £51.14 | 5 days | |
| ESTNR2020-20-0903 | 2 | 2 | 1.7 | 55 | 6 | 12 | 0.3 | 1.92 | 0.4° | £51.14 | 5 days | |
| ESTNR2020-12-0405 | 2 | 2 | 1.7 | 80 | 6 | 40 | 0.2 | 1.92 | 0.9° | £48.87 | 5 days | |
| ESTNR2020-16-0405 | 2 | 2 | 1.7 | 90 | 6 | 50 | 0.2 | 1.92 | 0.9° | £48.87 | 5 days | |
| ESTNR2020-30-0902 | 2 | 2 | 1.7 | 80 | 6 | 40 | 0.3 | 1.92 | 0.9° | £54.54 | 5 days | |
| ESTNR2020-40-0902 | 2 | 2 | 1.7 | 55 | 6 | 12 | 0.5 | 1.92 | 0.4° | £59.09 | 5 days | |
| ESTNR2020-25-0905 | 2 | 2 | 1.7 | 70 | 6 | 30 | 0.3 | 1.92 | 0.9° | £52.27 | 5 days | |
| ESTNR2020-40-0905 | 2 | 2 | 1.7 | 65 | 6 | 20 | 0.5 | 1.92 | 0.9° | £59.09 | 5 days | |
| ESTNR2020-30-0903 | 2 | 2 | 1.7 | 90 | 6 | 50 | 0.3 | 1.92 | 0.9° | £54.54 | 5 days | |
| ESTNR2020-30-0905 | 2 | 2 | 1.7 | 50 | 6 | 8 | 0.5 | 1.92 | 0.4° | £54.54 | 5 days | |
| ESTNR2020-40-0903 | 2 | 2 | 1.7 | 60 | 6 | 16 | 0.5 | 1.92 | 0.4° | £59.09 | 5 days | |
| ESTNR2020-50-0902 | 2 | 2 | 1.7 | 65 | 6 | 25 | 0.5 | 1.92 | 0.9° | £62.50 | 5 days | |
| ESTNR2020-50-0903 | 2 | 2 | 1.7 | 70 | 6 | 30 | 0.5 | 1.92 | 0.9° | £62.50 | 5 days | |
| ESTNR2020-8-0405 | 2 | 2 | 1.7 | 90 | 6 | 50 | 0.5 | 1.92 | 0.9° | £48.87 | 5 days | |
| ESTNR2020-50-0905 | 2 | 2 | 1.7 | 80 | 6 | 40 | 0.5 | 1.92 | 0.9° | £62.50 | 5 days | |
| ESTNR2030-40-0902 | 3 | 2 | 2.5 | 80 | 6 | 40 | 0.2 | 2.86 | 0.9° | £59.09 | 5 days | |
| ESTNR2030-60-0905 | 3 | 2 | 2.5 | 100 | 6 | 60 | 0.5 | 2.86 | 0.9° | £65.91 | 5 days | |
| ESTNR2030-40-0903 | 3 | 2 | 2.5 | 90 | 6 | 50 | 0.2 | 2.86 | 0.9° | £59.09 | 5 days | |
| ESTNR2030-40-0905 | 3 | 2 | 2.5 | 100 | 6 | 60 | 0.2 | 2.86 | 0.9° | £59.09 | 5 days | |
| ESTNR2030-60-0903 | 3 | 2 | 2.5 | 90 | 6 | 50 | 0.5 | 2.86 | 0.9° | £65.91 | 5 days | |
| ESTNR2030-50-0905 | 3 | 2 | 2.5 | 100 | 6 | 60 | 0.3 | 2.86 | 0.9° | £62.50 | 5 days | |
| ESTNR2030-50-0902 | 3 | 2 | 2.5 | 80 | 6 | 40 | 0.3 | 2.86 | 0.9° | £62.50 | 5 days | |
| ESTNR2030-50-0903 | 3 | 2 | 2.5 | 90 | 6 | 50 | 0.3 | 2.86 | 0.9° | £62.50 | 5 days | |
| ESTNR2030-60-0902 | 3 | 2 | 2.5 | 80 | 6 | 40 | 0.5 | 2.86 | 0.9° | £65.91 | 5 days |
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