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


Carmex Thread Turning Holder Screw Clamp - External - Left Hand - 150mm OAL - 16EL Insert - 25x25 Shank Size
| Type | Standard |
| Internal or External | External |
| Shank Size | 25x25 |
| Hand | Left |
| Overall Length | 150 |
| Insert | 16EL |
Learn more about Klarna
The Carmex Thread Turning External Holder (Left-Hand, 150 mm OAL, 25x25 shank) is a precision tool holder crafted for reliable external thread turning on lathes and turning centers. It works with ER/EL inserts and U-Type inserts, offering versatile options for a range of threading applications.
- Left-Hand Configuration: Optimized for left-handed threading operations, aligning rotation and cutting for consistent results.
- Overall Length: 150 mm (OAL) provides the reach needed for longer workpieces while maintaining rigidity.
- Shank Size: 25 x 25 mm square shank ensures broad compatibility with standard tool holders and adapters.
- Insert Compatibility: Supports ER and EL inserts and is designed to accommodate U-Type inserts for specialized thread forms.
- Helix Angle: 1.5° helix angle aids chip evacuation and contributes to smoother cutting action.
- Clamping Design: Robust screw clamp delivers secure seating and repeatable performance under demanding cuts.
- Construction Focus: Built to withstand the stresses of external thread turning with dependable rigidity and stability.
With its proven clamp mechanism and thoughtful geometry, this holder helps you achieve accurate thread profiles with less tool deflection and consistent surface finish. The 1.5° helix angle enhances chip flow, reducing burrs and cutting temperature, while the broad 25x25 mm shank and 150 mm reach support stable, productive passes on longer workpieces. Whether you’re threading stainless steel, tool steel, or aluminum, this Carmex external holder delivers reliable performance, straightforward setup, and lasting value for both job shop runs and ongoing production workloads.
| Type | Standard |
| Internal or External | External |
| Shank Size | 25x25 |
| Hand | Left |
| Overall Length | 150 |
| Insert | 16EL |
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 Screw Clamp Thread Turning External Holders - Right/Left Hand - For ER/EL Inserts
View full collection →You are viewing SEL2525M16. Click any other SKU to view its full details.
| Product SKU | Type | Internal or External | Shank Size | Hand | Overall Length | Insert | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|---|
| SER0808H11 | Standard | External | 8x8 | Right | 100 | 11ER | £42.22 | 5 days | |
| SER1010H11 | Standard | External | 10x10 | Right | 100 | 11ER | £49.72 | 5 days | |
| SER1010M11 | Standard | External | 10x10 | Right | 150 | 11ER | £54.72 | 5 days | |
| SER1212K11 | Standard | External | 12x12 | Right | 125 | 11ER | £49.72 | In Stock | |
| SER1212M11 | Standard | External | 12x12 | Right | 150 | 11ER | £54.72 | 5 days | |
| SER1212F16 | Standard | External | 12x12 | Right | 80 | 16ER | £49.72 | In Stock | |
| SER1616H16 | Standard | External | 16x16 | Right | 100 | 16ER | £49.72 | In Stock | |
| SER2020K16 | Standard | External | 20x20 | Right | 125 | 16ER | £49.72 | 5 days | |
| SER2525M16 | Standard | External | 25x25 | Right | 150 | 16ER | £56.34 | In Stock | |
| SER3232P16 | Standard | External | 32x32 | Right | 170 | 16ER | £85.22 | In Stock | |
| SER2525M22 | Standard | External | 25x25 | Right | 150 | 22ER | £59.64 | In Stock | |
| SER3232P22 | Standard | External | 32x32 | Right | 170 | 22ER | £130.38 | 5 days | |
| SER4040R22 | Standard | External | 40x40 | Right | 200 | 22ER | £160.17 | In Stock | |
| SER2525M22U | Standard | External | 25x25 | Right | 150 | 22UER | £77.30 | 5 days | |
| SER3232P22U | Standard | External | 32x32 | Right | 170 | 22UER | £140.76 | 5 days | |
| SER4040R22U | Standard | External | 40x40 | Right | 200 | 22UER | £168.72 | 5 days | |
| SER2525M27 | Standard | External | 25x25 | Right | 150 | 27ER | £77.30 | In Stock | |
| SER3232P27 | Standard | External | 32x32 | Right | 170 | 27ER | £151.50 | 5 days | |
| SER4040R27 | Standard | External | 40x40 | Right | 200 | 27ER | £180.48 | 5 days | |
| SER2525M27U | Standard | External | 25x25 | Right | 150 | 27UER | £100.48 | 5 days | |
| SER3232P27U | Standard | External | 32x32 | Right | 170 | 27UER | £152.76 | 5 days | |
| SER4040R27U | Standard | External | 40x40 | Right | 200 | 27UER | £182.19 | 5 days | |
| SER2525M33U | Standard | External | 25x25 | Right | 150 | 33UER | £98.54 | 5 days | |
| SER3232P33U | Standard | External | 32x32 | Right | 170 | 33UER | £197.13 | 5 days | |
| SEL0808H11 | Standard | External | 8x8 | Left | 100 | 11EL | £44.24 | 5 days | |
| SEL1010H11 | Standard | External | 10x10 | Left | 100 | 11EL | £49.72 | 5 days | |
| SEL1010M11 | Standard | External | 10x10 | Left | 150 | 11EL | £54.72 | 5 days | |
| SEL1212K11 | Standard | External | 12x12 | Left | 125 | 11EL | £49.72 | 5 days | |
| SEL1212M11 | Standard | External | 12x12 | Left | 150 | 11EL | £54.72 | 5 days | |
| SEL1212F16 | Standard | External | 12x12 | Left | 80 | 16EL | £49.72 | 5 days | |
| SEL1616H16 | Standard | External | 16x16 | Left | 100 | 16EL | £49.72 | In Stock | |
| SEL2020K16 | Standard | External | 20x20 | Left | 125 | 16EL | £49.72 | In Stock | |
| SEL2525M16 Viewing | Standard | External | 25x25 | Left | 150 | 16EL | £56.34 | 5 days | |
| SEL3232P16 | Standard | External | 32x32 | Left | 170 | 16EL | £85.22 | 5 days | |
| SEL2525M22 | Standard | External | 25x25 | Left | 150 | 22EL | £59.64 | In Stock | |
| SEL3232P22 | Standard | External | 32x32 | Left | 170 | 22EL | £86.92 | 5 days | |
| SEL4040R22 | Standard | External | 40x40 | Left | 200 | 22EL | £106.78 | 5 days | |
| SEL2525M22U | Standard | External | 25x25 | Left | 150 | 22UEL | £77.30 | 5 days | |
| SEL3232P22U | Standard | External | 32x32 | Left | 170 | 22UEL | £93.84 | 5 days | |
| SEL4040R22U | Standard | External | 40x40 | Left | 200 | 22UEL | £112.48 | 5 days | |
| SEL2525M27 | Standard | External | 25x25 | Left | 150 | 27EL | £77.30 | In Stock | |
| SEL3232P27 | Standard | External | 32x32 | Left | 170 | 27EL | £101.00 | 5 days | |
| SEL4040R27 | Standard | External | 40x40 | Left | 200 | 27EL | £120.32 | 5 days | |
| SEL2525M27U | Standard | External | 25x25 | Left | 150 | 27UEL | £100.48 | 5 days | |
| SEL3232P27U | Standard | External | 32x32 | Left | 170 | 27UEL | £101.84 | 5 days | |
| SEL4040R27U | Standard | External | 40x40 | Left | 200 | 27UEL | £121.46 | 5 days | |
| SEL2525M33U | Standard | External | 25x25 | Left | 150 | 33UEL | £98.54 | 5 days | |
| SEL3232P33U | Standard | External | 32x32 | Left | 170 | 33UEL | £131.42 | 5 days |
No products match your filters.