Please log in here to access all benefits, including promotional discounts and faster checkouts.

OSG Carbide 4 Flute End Mill Ball Nose - Regular Length Centre Cutting For General Applications - 9mm

SKU:OSG-404-3543-BN

The OSG Carbide 4 Flute End Mill with Ball Nose is a 9 mm diameter, regular-length, center-cutting cutting tool designed for general machining tasks. With four flutes and a ball nose, it's ideal ... Read more ↓
P
M
K
N
S
H
Cutter Diameter9
Number of Flutes4
Flute Length22
Overall Length70
View all specifications ↓
Download Cutting Data
£30.71
Prices shown ex. VAT
In Stock
View Other Sizes →
Free delivery over £50 ex VAT
Secure checkout
14-day returns
30+ years expertise
Klarna
Pay in 3 interest-free instalments. No extra cost if paid on time. 18+ only.
Learn more about Klarna
Speak to our team
01732 887334
Mon – Thurs 8:30 – 17:30 · Fri 8:30 – 16:30

Description

The OSG Carbide 4 Flute End Mill with Ball Nose is a 9 mm diameter, regular-length, center-cutting cutting tool designed for general machining tasks. With four flutes and a ball nose, it's ideal for contouring, profiling, and 3D shaping, delivering smooth, precise surfaces across a range of materials.

Built for durability and consistent performance, this end mill suits professionals and hobbyists alike—from aerospace and automotive work to everyday manufacturing projects. The carbide construction provides long tool life and reliable cutting under demanding workloads, making it a dependable choice for high-quality results.

  • Four-flute design for fast, clean material removal: The extra cutting edges help remove material efficiently and stabilize cutting, reducing cycle times and delivering consistent finishes across workpieces.
  • Ball nose geometry for smooth contouring and precise 3D shaping: The rounded tip enables gentle radii and accurate 3D features, resulting in smoother surface finishes and precise geometry on complex pockets, fillets, and transitions.
  • Center-cutting with regular length for versatile setups: Center-cutting lets you plunge directly into slots and pockets, while the regular length offers compatibility with a wide range of depths and fixture configurations for reliable results.

In everyday use, you’ll gain consistent, high-quality surfaces on contours and 3D features, faster setup, and reduced tool wear. The robust carbide construction and balanced geometry are designed for reliable performance in demanding tasks—from routine general machining to precision 3D work—helping your operation run smoother and finish parts right the first time.

Part Numbers

Protool Part Number
OSG-404-3543-BN
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 4 Flute End Mill Ball Nose - Regular Length Centre Cutting For General Applications

View full collection →

You are viewing OSG-404-3543-BN. Click any other SKU to view its full details.

Product SKUCutter DiameterNumber of FlutesFlute LengthOverall LengthShank DiameterPriceStock Order
OSG-404-0394-BN 143393£19.59 In Stock
OSG-404-0591-BN 1.545393£12.65 In Stock
OSG-404-0787-BN 247393£13.89 In Stock
OSG-404-0984-BN 2.548393£12.65 In Stock
OSG-404-1181-BN 3410393£12.66 In Stock
OSG-404-1378-BN 3.5412514£17.41 In Stock
OSG-404-1575-BN 4414514£18.21 In Stock
OSG-404-1772-BN 4.5414515£19.24 In Stock
OSG-404-1968-BN 5416515£19.24 In Stock
OSG-404-2362-BN 6419646£23.02 In Stock
OSG-404-2756-BN 7419648£27.44 In Stock
OSG-404-3150-BN 8421648£26.80 In Stock
OSG-404-3543-BN Viewing94227010£30.71 In Stock
OSG-404-3937-BN 104257010£36.03 In Stock
OSG-404-4331-BN 114257011£49.39 In Stock
OSG-404-4724-BN 124257612£59.38 In Stock
OSG-404-5512-BN 144308914£83.30 In Stock
OSG-404-6299-BN 164328916£114.02 In Stock
OSG-404-7087-BN 1843510218£147.22 In Stock
OSG-404-7874-BN 2043810220£167.32 In Stock
OSG-404-8661-BN 2243810222£285.14 1-2 days
OSG-404-9843-BN 2543810225£309.40 In Stock

Other sizes in this range

with tools we think you'll like
All 22 →