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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

Carmex Carbide Tiny Tool - Deep Face Grooving - MVR - K20 Grade - 20mm Minimum Diameter x 4mm Groove Width x 43mm Groove Depth

SKU:MVR8B4.0L43K20

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... Read more ↓
M
K
N
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ApplicationDeep Face Grooving (MVR)
Minimum Diameter20
Groove Width (B)4
Groove Depth (L1)43
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£87.80
Prices shown ex. VAT
5 days estimated lead time — subject to availability
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Free delivery over £50 ex VAT
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30+ years expertise
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01732 887334
Mon – Thurs 8:30 – 17:30 · Fri 8:30 – 16:30

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.

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: Carmex Carbide Tiny Tools - Deep Face Grooving - Grade K20 (MVR)

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You are viewing MVR8B4.0L43K20. Click any other SKU to view its full details.

Product SKUMinimum DiameterGroove WidthGroove DepthRadiusGradeHolderPriceStock Order
MVR6B2.5L15K20 102.5150.2K20SIM****H6£45.43 5 days
MVR8B3.0L27K20 153270.2K20SIM****H8£73.10 5 days
MVR6B2.0L22K20 122220.2K20SIM****H6£57.53 5 days
MVR8B4.0L43K20 Viewing204430.2K20SIM****H8£87.80 5 days
MVR6B2.0L10K20 102100.2K20SIM****H6£53.75 5 days
MVR8B3.0L43K20 153430.2K20SIM****H8£87.80 5 days
MVR6B2.0L15K20 122150.2K20SIM****H6£53.75 5 days
MVR6B3.0L22K20 103220.2K20SIM****H6£57.53 5 days
MVR6B2.5L22K20 122.5220.2K20SIM****H6£57.53 5 days
MVL6B2.0L10K20 102100.2K20SIM****H6£45.43 5 days
MVL6B2.0L15K20 122150.2K20SIM****H6£45.43 5 days
MVL6B2.0L22K20 122220.2K20SIM****H6£48.60 5 days
MVL6B2.5L15K20 102.5150.2K20SIM****H6£45.43 5 days
MVL6B2.5L22K20 122.5220.2K20SIM****H6£48.60 5 days
MVL6B3.0L22K20 103220.2K20SIM****H6£48.60 5 days
MVL8B3.0L27K20 153270.2K20SIM****H8£73.10 5 days
MVL8B3.0L43K20 153430.2K20SIM****H8£74.20 5 days
MVL8B4.0L43K20 204430.2K20SIM****H8£87.80 5 days

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