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Widin Carbide End Mill - 4 Flute Regular Length Imperial - 5/16

SKU:ZA504020

The Widin Carbide End Mill is a high-performance cutting tool designed for precision machining across automotive, aerospace, mold making, and general metalworking applications. Its four-flute, re... Read more ↓
P
Cutter Diameter5/16
Number of Flutes4
Flute Length13/16
Overall Length2-1/2
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£21.15
Prices shown ex. VAT
5 days estimated lead time — subject to availability
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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

The Widin Carbide End Mill is a high-performance cutting tool designed for precision machining across automotive, aerospace, mold making, and general metalworking applications. Its four-flute, regular-length geometry balances aggressive material removal with smooth finishes, while the carbide body delivers outstanding durability and wear resistance for longer tool life.

With an imperial 5/16-inch diameter, this end mill is ready to slot into standard machines and tooling inventories, providing a reliable upgrade path that minimizes tool changes and downtime. It’s suitable for cutting steel, stainless steel, cast iron, and non-ferrous metals, making it a versatile choice for mixed-material work.

  • Four-Flute, Regular-Length Geometry: Delivers higher material removal rates with efficient chip evacuation, helping you maintain stable cutting conditions and a smooth surface finish.
  • Carbide Construction for Durability: Built from solid carbide to resist wear in demanding cutting conditions, promoting longer tool life and more consistent performance between changes.
  • 5/16-Inch Imperial Size: Standard imperial diameter that fits common machines and tooling setups, simplifying selection, stocking, and replacement in imperial workflows.

This end mill helps you streamline your workflow by delivering dependable, repeatable cuts across steel, stainless steel, cast iron, and non-ferrous metals. The combination of a robust carbide body, a 4-flute design for efficient material removal, and the familiar imperial sizing means fewer tool changes, longer life per tool, and consistently high-quality finishes—so you can complete more work with confidence.

Part Numbers

Protool Part Number
ZA504020
Brand
Widin
Category
End Mill
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.

Full Range: Widin Carbide End Mill - 4 Flute Regular Length Imperial (ZA504)

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You are viewing ZA504020. Click any other SKU to view its full details.

Product SKUCutter DiameterNumber of FlutesFlute LengthOverall LengthShank DiameterPriceStock Order
ZA504004 1/1643/161-1/21/8£10.68 5 days
ZA504008 1/841/21-1/21/8£10.68 5 days
ZA504012 3/1645/823/16£12.00 5 days
ZA504016 1/443/42-1/21/4£14.60 5 days
ZA504020 Viewing5/16413/162-1/25/16£21.15 5 days
ZA504024 3/8412-1/23/8£24.98 5 days
ZA504028 7/16412-3/47/16£31.78 5 days
ZA504032 1/24131/2£39.78 5 days
ZA504040 5/841-1/43-1/25/8£87.25 In Stock
ZA504048 3/441-1/243/4£169.15 5 days
ZA504064 141-1/241£238.28 In Stock

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