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Carmex Carbide Tiny Tool - Deep Face Grooving - MVR - K20 Grade - 20mm Minimum Diameter x 4mm Groove Width x 43mm Groove Depth
| Application | Deep Face Grooving (MVR) |
| Minimum Diameter | 20 |
| Groove Width (B) | 4 |
| Groove Depth (L1) | 43 |
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The ones our customers buy most.Description
The Carmex Carbide Tiny Tool is a compact solid carbide tool designed specifically for deep face grooving. This MVR tool uses a K20 grade carbide with a 20 mm minimum diameter, a 4 mm groove width, and a 43 mm groove depth, making it ideal for precise, reliable grooves in tight spaces. It’s well-suited for engineers, machinists, and hobbyists who need consistent performance in challenging grooving tasks.
Designed to perform across a range of materials, the tool balances rigidity and control to help you complete demanding grooving jobs with predictable results and reliable cycle times.
- Deep groove capability (43 mm depth, 4 mm width): Optimized geometry enables precise, stable grooving at significant depths and narrow widths, helping you achieve the required groove profile in fewer passes.
- K20 solid carbide core: High hardness and wear resistance deliver durable performance under tough grooving loads, supporting consistent results over multiple cuts and across stainless steels.
- Coating options for optimized performance: The line includes coated grades such as BXC (PVD TiN) for low-speed stainless steel work and BMK (sub-micron, triple coating) for high-heat, smooth cutting, allowing you to tailor the tool to your material and process conditions.
With its specialized deep-grooving geometry, robust K20 carbide substrate, and coating options designed to match cutting speed and material, this tiny tool delivers reliable groove quality, extended tool life, and a dependable workflow across a range of grooving applications. Its compact form fits tight fixtures and limited spindle clearances, making it a practical choice for both production environments and targeted projects.
Part Numbers
- Protool Part Number
- MVR8B4.0L43K20
- 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 - Deep Face Grooving - Grade K20 (MVR)
View full collection →You are viewing MVR8B4.0L43K20. Click any other SKU to view its full details.
| Product SKU | Minimum Diameter | Groove Width | Groove Depth | Radius | Grade | Holder | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|---|
| MVR6B2.5L15K20 | 10 | 2.5 | 15 | 0.2 | K20 | SIM****H6 | £45.43 | 5 days | |
| MVR8B3.0L27K20 | 15 | 3 | 27 | 0.2 | K20 | SIM****H8 | £73.10 | 5 days | |
| MVR6B2.0L22K20 | 12 | 2 | 22 | 0.2 | K20 | SIM****H6 | £57.53 | 5 days | |
| MVR8B4.0L43K20 Viewing | 20 | 4 | 43 | 0.2 | K20 | SIM****H8 | £87.80 | 5 days | |
| MVR6B2.0L10K20 | 10 | 2 | 10 | 0.2 | K20 | SIM****H6 | £53.75 | 5 days | |
| MVR8B3.0L43K20 | 15 | 3 | 43 | 0.2 | K20 | SIM****H8 | £87.80 | 5 days | |
| MVR6B2.0L15K20 | 12 | 2 | 15 | 0.2 | K20 | SIM****H6 | £53.75 | 5 days | |
| MVR6B3.0L22K20 | 10 | 3 | 22 | 0.2 | K20 | SIM****H6 | £57.53 | 5 days | |
| MVR6B2.5L22K20 | 12 | 2.5 | 22 | 0.2 | K20 | SIM****H6 | £57.53 | 5 days | |
| MVL6B2.0L10K20 | 10 | 2 | 10 | 0.2 | K20 | SIM****H6 | £45.43 | 5 days | |
| MVL6B2.0L15K20 | 12 | 2 | 15 | 0.2 | K20 | SIM****H6 | £45.43 | 5 days | |
| MVL6B2.0L22K20 | 12 | 2 | 22 | 0.2 | K20 | SIM****H6 | £48.60 | 5 days | |
| MVL6B2.5L15K20 | 10 | 2.5 | 15 | 0.2 | K20 | SIM****H6 | £45.43 | 5 days | |
| MVL6B2.5L22K20 | 12 | 2.5 | 22 | 0.2 | K20 | SIM****H6 | £48.60 | 5 days | |
| MVL6B3.0L22K20 | 10 | 3 | 22 | 0.2 | K20 | SIM****H6 | £48.60 | 5 days | |
| MVL8B3.0L27K20 | 15 | 3 | 27 | 0.2 | K20 | SIM****H8 | £73.10 | 5 days | |
| MVL8B3.0L43K20 | 15 | 3 | 43 | 0.2 | K20 | SIM****H8 | £74.20 | 5 days | |
| MVL8B4.0L43K20 | 20 | 4 | 43 | 0.2 | K20 | SIM****H8 | £87.80 | 5 days |
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