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OSG Carbide 3 Flute End Mill Square - Regular Length Centre Cutting For General Applications - 20mm

SKU:OSG-403-7874

The OSG Carbide 3 Flute End Mill Square is a regular-length, center-cutting carbide cutter designed for general machining tasks. Its three-flute, square-cut geometry delivers efficient material r... Read more ↓
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Cutter Diameter20
Number of Flutes3
Flute Length38
Overall Length102
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£174.33
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In Stock— only 6 left
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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 OSG Carbide 3 Flute End Mill Square is a regular-length, center-cutting carbide cutter designed for general machining tasks. Its three-flute, square-cut geometry delivers efficient material removal and crisp edge quality across a broad range of materials.

With a 20 mm diameter, this end mill provides versatile performance for milling, slotting, and profiling in workshops, job shops, and DIY setups. It’s a reliable choice for engineers, machinists, and hobbyists who depend on predictable, repeatable results in everyday projects.

  • Three-Flute Design for Balanced Cutting: Delivers steady chip removal and a strong cutting action that supports faster material removal while maintaining a smooth finish across common materials.
  • Center-Cutting Capability for Plunging and Slotting: Allows starting cuts in the middle of the workpiece and executing precise slots without extra tools or setups.
  • Regular-Length Carbide Construction for Durability: Built from high-quality carbide to resist wear and maintain accuracy during long runs and multiple jobs.

This combination of geometry and material gives you a dependable workhorse that helps you finish parts faster, with cleaner edges and tighter tolerances. Its durability reduces tool changes and downtime, while its versatility lets you handle a wide range of everyday tasks—from rough milling to precise profiling—without swapping cutters.

Part Numbers

Protool Part Number
OSG-403-7874
Brand
OSG
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: OSG Carbide 3 Flute End Mill Square - Regular Length Centre Cutting For General Applications

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You are viewing OSG-403-7874. Click any other SKU to view its full details.

Product SKUCutter DiameterNumber of FlutesFlute LengthOverall LengthShank DiameterPriceStock Order
OSG-403-0394 133393£19.15 In Stock
OSG-403-0591 1.535393£12.35 In Stock
OSG-403-0787 237393£13.60 In Stock
OSG-403-0984 2.538393£12.35 In Stock
OSG-403-1181 3310393£12.37 In Stock
OSG-403-1378 3.5312514£17.03 In Stock
OSG-403-1575 4314514£17.79 In Stock
OSG-403-1772 4.5314515£18.86 In Stock
OSG-403-1968 5316515£18.86 In Stock
OSG-403-2362 6319646£22.47 In Stock
OSG-403-2756 7319648£26.88 In Stock
OSG-403-3150 8321648£26.18 In Stock
OSG-403-3543 93227010£30.15 In Stock
OSG-403-3937 103257010£35.23 In Stock
OSG-403-4331 113257011£48.33 In Stock
OSG-403-4724 123257612£57.96 In Stock
OSG-403-5512 143308914£81.47 In Stock
OSG-403-6299 163328916£106.62 In Stock
OSG-403-7087 1833510218£153.86 In Stock
OSG-403-7874 Viewing2033810220£174.33 In Stock
OSG-403-8661 2233810222£297.05 In Stock
OSG-403-9843 2533810225£322.85 In Stock

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