Please log in here to access all benefits, including promotional discounts and faster checkouts.
OSG 55° Helix Endmill Square Edge - Centre Cutting Regular Length - 4mm
| Cutter Diameter | 4 |
| Number of Flutes | 2 |
| Flute Length | 14 |
| Overall Length | 51 |
Learn more about Klarna
Description
The OSG 55° Helix Endmill Square Edge is a centre-cutting, regular-length milling tool designed for precise material removal across a wide range of applications. With a 4 mm diameter and a 55-degree helix, it delivers efficient chip evacuation and versatile performance for milling, profiling, and slotting.
Built to perform in busy shop environments, the square-edge geometry maintains stability for consistent results, helping you achieve clean edges and accurate dimensions on every part.
- 55° Helix for Efficient Chip Evacuation: The 55-degree helix angle guides chips away from the cut quickly, reducing heat buildup and cutting forces for smoother, steadier milling.
- Square-Edge Geometry for Precision: The square-edge design delivers clean material removal with tight tolerances and stable cutting reliability, enabling precise profiling and slotting.
- Centre-Cutting, Regular-Length Versatility: Centre-cutting capability allows plunging and profiling in a variety of materials, while the regular-length flute geometry promotes steady engagement and predictable results.
The combination of these features delivers reliable performance across general machining tasks, helping you complete projects with fewer passes, cleaner edges, and consistent results. Designed for engineers, foremen, machinists, and hobbyists alike, this endmill provides dependable durability and straightforward setup for everyday milling workloads.
Part Numbers
- Protool Part Number
- OSG-402-157655
- 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.
Full Range: OSG 55° Helix Endmill Square Edge - Centre Cutting Regular Length
View full collection →You are viewing OSG-402-157655. Click any other SKU to view its full details.
| Product SKU | Cutter Diameter | Number of Flutes | Flute Length | Overall Length | Shank Diameter | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|
| OSG-402-118155 | 3 | 2 | 10 | 39 | 3 | £14.40 | In Stock | |
| OSG-402-157655 Viewing | 4 | 2 | 14 | 51 | 4 | £16.82 | In Stock | |
| OSG-402-196855 | 5 | 2 | 16 | 51 | 5 | £22.09 | In Stock | |
| OSG-402-236255 | 6 | 2 | 19 | 64 | 6 | £26.41 | In Stock | |
| OSG-402-315055 | 8 | 2 | 21 | 64 | 8 | £31.23 | In Stock | |
| OSG-402-393755 | 10 | 2 | 25 | 70 | 10 | £52.85 | In Stock | |
| OSG-402-472455 | 12 | 2 | 25 | 76 | 12 | £72.07 | In Stock | |
| OSG-402-551255 | 14 | 2 | 30 | 89 | 14 | £107.43 | In Stock | |
| OSG-402-629955 | 16 | 2 | 32 | 89 | 16 | £134.03 | In Stock | |
| OSG-402-708755 | 18 | 2 | 35 | 102 | 18 | £165.23 | In Stock | |
| OSG-402-787455 | 20 | 2 | 38 | 102 | 20 | £193.00 | In Stock | |
| OSG-402-984355 | 25 | 2 | 38 | 102 | 25 | £266.10 | In Stock |
No products match your filters.
