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Carmex Carbide Tiny Tool - Threading - MIR - 55° Partial - BMK Grade - 4.1mm Minimum Diameter x 15mm Reach
| Application | Threading (MIR) |
| Thread Form | 55° Partial |
| Pitch or Pitch Range | (0.5-1.0mm) (48-24 TPI) |
| Minimum Diameter | 4.1 |
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Introducing the Carmex Carbide Tiny Tool for Threading (MIR, 55° Partial). This compact threading bar is engineered for precise 55-degree thread forms in the smallest bores, making it ideal for confined spaces and intricate assemblies. It can work in bores down to 1.2 mm (0.05 in) with a 4.1 mm minimum diameter and a 15 mm reach, helping you complete threads in tight locations without unnecessary disassembly.
Crafted from BMK-grade carbide and finished with an advanced PVD triple coating (ISO K10–K20), this tool combines extreme heat resistance with smooth cutting performance. The coating and geometry are designed to deliver reliable, long-lasting performance across a wide range of materials, providing a dependable threading solution for demanding production environments.
- 55° Partial-Profile threading design: Delivers accurate, repeatable 55° thread forms in small bores, reducing scrap and rework in tight assemblies.
- BMK-grade carbide with triple-PVD coating: Sub-micron wear-resistant grade with a high-heat-tolerant coating for durable, smooth cutting across materials.
- Compact form factor for tight spaces: 4.1 mm minimum diameter with 15 mm reach (bores down to 1.2 mm) to reach and thread in confined interiors without disassembly.
This tool supports efficient threading workflows by combining precise geometry, robust coating, and a compact profile that suits challenging small-bore applications. It helps you achieve reliable thread quality, minimizes downtime, and enhances overall productivity in precision machining tasks.
Part Numbers
- Protool Part Number
- MIR4L15A55BMK
- Brand
- Carmex
- Category
- Tiny Tool Inserts
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: Carmex Carbide Tiny Tools - Small Threading Partial Profile 55° Tool (MIR)
View full collection →You are viewing MIR4L15A55BMK. Click any other SKU to view its full details.
| Product SKU | Pitch or Pitch Range | Minimum Diameter | Reach | Grade | Holder | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|
| MIR3L15A55BMK | (0.5-1.0mm) (48-24 TPI) | 3.2 | 15 | BMK | SIM****H3 | £27.35 | 5 days | |
| MIR3L15A55BXC | (0.5-1.0mm) (48-24 TPI) | 3.2 | 15 | BXC | SIM****H3 | £24.93 | 5 days | |
| MIR4L15A55BMK Viewing | (0.5-1.0mm) (48-24 TPI) | 4.1 | 15 | BMK | SIM****H4 | £27.35 | 5 days | |
| MIR4L15A55BXC | (0.5-1.0mm) (48-24 TPI) | 4.1 | 15 | BXC | SIM****H4 | £24.93 | 5 days | |
| MIR5L15A55BMK | (0.5-1.25mm) (48-24 TPI) | 5.1 | 15 | BMK | SIM****H5 | £28.00 | In Stock | |
| MIR5L15A55BXC | (0.5-1.25mm) (48-24 TPI) | 5.1 | 15 | BXC | SIM****H5 | £25.48 | 5 days | |
| MIR5L22A55BMK | (0.5-1.25mm) (48-20 TPI) | 5.1 | 22 | BMK | SIM****H5 | £29.35 | 5 days | |
| MIR5L22A55BXC | (0.5-1.25mm) (48-20 TPI) | 5.1 | 22 | BXC | SIM****H5 | £26.68 | 5 days | |
| MIR6L15A55BMK | (0.5-1.5mm) (48-16 TPI) | 6 | 15 | BMK | SIM****H6 | £28.55 | In Stock | |
| MIR6L15A55BXC | (0.5-1.5mm) (48-16 TPI) | 6 | 15 | BXC | SIM****H6 | £25.93 | In Stock | |
| MIR6L22A55BMK | (0.5-1.5mm) (48-16 TPI) | 6 | 22 | BMK | SIM****H6 | £30.00 | 5 days | |
| MIR6L22A55BXC | (0.5-1.5mm) (48-16 TPI) | 6 | 22 | BXC | SIM****H6 | £27.28 | In Stock | |
| MIL6L22A55BXC | (0.5-1.5mm) (48-16 TPI) | 6 | 22 | BXC | SIM****H6 | £27.28 | In Stock | |
| MIR5L15A55K20 | (0.5-1.25mm) (48-24 TPI) | 5.1 | 15 | K20 | SIM****H5 | £24.20 | 5 days | |
| MIR4L15A55K20 | (0.5-1.0mm) (48-24 TPI) | 4.1 | 15 | K20 | SIM****H4 | £23.65 | 5 days | |
| MIR6L22A55K20 | (0.5-1.5mm) (48-16 TPI) | 6 | 22 | K20 | SIM****H6 | £25.90 | 5 days | |
| MIR6L15A55K20 | (0.5-1.5mm) (48-16 TPI) | 6 | 15 | K20 | SIM****H6 | £24.60 | 5 days | |
| MIR3L15A55K20 | (0.5-1.0mm) (48-24 TPI) | 3.2 | 15 | K20 | SIM****H3 | £23.65 | 5 days | |
| MIR5L22A55K20 | (0.5-1.25mm) (48-20 TPI) | 5.1 | 22 | K20 | SIM****H5 | £25.35 | 5 days | |
| MIR6L22A55TNX | (0.5-1.5mm) (48-16 TPI) | 6 | 22 | TNX | SIM****H6 | £27.65 | 5 days | |
| MIR6L15A55TNX | (0.5-1.5mm) (48-16 TPI) | 6 | 15 | TNX | SIM****H6 | £26.30 | 5 days | |
| MIL6L22A55BXC | (0.5-1.5mm) (48-16 TPI) | 6 | 22 | BXC | SIM****H6 | £27.28 | In Stock | |
| MIL3L15A55BMK | (0.5-1.0mm) (48-24 TPI) | 3.2 | 15 | BMK | SIM****H3 | £27.35 | 5 days | |
| MIL3L15A55BXC | (0.5-1.0mm) (48-24 TPI) | 3.2 | 15 | BXC | SIM****H3 | £24.93 | 5 days | |
| MIL3L15A55K20 | (0.5-1.0mm) (48-24 TPI) | 3.2 | 15 | K20 | SIM****H3 | £23.65 | 5 days | |
| MIL4L15A55BMK | (0.5-1.0mm) (48-24 TPI) | 4.1 | 15 | BMK | SIM****H4 | £27.35 | 5 days | |
| MIL4L15A55BXC | (0.5-1.0mm) (48-24 TPI) | 4.1 | 15 | BXC | SIM****H4 | £24.93 | In Stock | |
| MIL4L15A55K20 | (0.5-1.0mm) (48-24 TPI) | 4.1 | 15 | K20 | SIM****H4 | £23.65 | 5 days | |
| MIL5L15A55BMK | (0.5-1.25mm) (48-24 TPI) | 5.1 | 15 | BMK | SIM****H5 | £28.00 | 5 days | |
| MIL5L15A55BXC | (0.5-1.25mm) (48-24 TPI) | 5.1 | 15 | BXC | SIM****H5 | £25.48 | 5 days | |
| MIL5L15A55K20 | (0.5-1.25mm) (48-24 TPI) | 5.1 | 15 | K20 | SIM****H5 | £24.20 | 5 days | |
| MIL5L22A55BMK | (0.5-1.25mm) (48-20 TPI) | 5.1 | 22 | BMK | SIM****H5 | £29.35 | 5 days | |
| MIL5L22A55BXC | (0.5-1.25mm) (48-20 TPI) | 5.1 | 22 | BXC | SIM****H5 | £26.68 | 5 days | |
| MIL5L22A55K20 | (0.5-1.25mm) (48-20 TPI) | 5.1 | 22 | K20 | SIM****H5 | £25.35 | 5 days | |
| MIL6L15A55BMK | (0.5-1.5mm) (48-16 TPI) | 6 | 15 | BMK | SIM****H6 | £28.55 | 5 days | |
| MIL6L15A55BXC | (0.5-1.5mm) (48-16 TPI) | 6 | 15 | BXC | SIM****H6 | £25.93 | 5 days | |
| MIL6L15A55K20 | (0.5-1.5mm) (48-16 TPI) | 6 | 15 | K20 | SIM****H6 | £24.60 | 5 days | |
| MIL6L15A55TNX | (0.5-1.5mm) (48-16 TPI) | 6 | 15 | TNX | SIM****H6 | £26.30 | 5 days | |
| MIL6L22A55BMK | (0.5-1.5mm) (48-16 TPI) | 6 | 22 | BMK | SIM****H6 | £30.00 | 5 days | |
| MIL6L22A55K20 | (0.5-1.5mm) (48-16 TPI) | 6 | 22 | K20 | SIM****H6 | £25.90 | 5 days | |
| MIL6L22A55TNX | (0.5-1.5mm) (48-16 TPI) | 6 | 22 | TNX | SIM****H6 | £27.68 | 5 days |
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