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Carmex Carbide Tiny Tool - Boring Bar - MTR - BMK Grade - 4.1mm Minimum Diameter x 22mm Reach x R0.05

SKU:MTR4R0.05L22BMK

The Carmex Carbide Tiny Tool is a compact solid carbide boring bar engineered for precision internal boring while also tackling general turning tasks. With a 4.1 mm minimum diameter, 22 mm reach,... Read more ↓
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ApplicationBoring (MTR)
Minimum Diameter4.1
Reach (L1)22
Radius (R)0.05
GradeBMK
HolderSIM****H4
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£26.86
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5 days estimated lead time — subject to availability
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01732 887334
Mon – Thurs 8:30 – 17:30 · Fri 8:30 – 16:30

The Carmex Carbide Tiny Tool is a compact solid carbide boring bar engineered for precision internal boring while also tackling general turning tasks. With a 4.1 mm minimum diameter, 22 mm reach, and a nose radius of R0.05, it fits tight bores and deep features without sacrificing stability or control. Designed for engineers, machinists, and hobbyists alike, this tiny tool delivers reliable performance in confined spaces.

  • BMK Grade with advanced PVD triple coating for maximum heat resistance: Sub-micron carbide with a specialized PVD coating provides exceptional edge retention and smooth cutting, even at higher temperatures, giving you consistent, long-lasting performance across a wide range of materials.
  • Compact size with long reach for tight bores: The 4.1 mm minimum diameter and 22 mm reach let you access small internal features and deep pockets confidently, while maintaining rigidity and precise control in demanding applications.
  • Versatile, general-purpose tool for all materials: Optimized for a broad material set, including stainless steels, this tool supports boring and turning tasks with reliable finishes and reduced need for tool changes.

In practical use, this tiny boring bar helps streamline workflows by handling internal pockets and shallow shoulders in a single setup, delivering clean corners and smooth surfaces. Its BMK-coated carbide construction stands up to demanding jobs, so you spend less time resharpening or swapping tools and more time producing accurate parts with repeatable results.

Application Boring (MTR)
Minimum Diameter 4.1
Reach (L1) 22
Radius (R) 0.05
Grade BMK
Holder SIM****H4
L 51
F 1.7
D 4

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.

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Staff are very helpful and interested in providing a good service making us the customer feel valued.
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first place we look
honest about stock and prices are competitive.
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Staff are very helpful and polite.Goods that were in stock were dispatched same day and back orders were quick in coming through .
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Buying experience
Phone requests are handled quickly and without any fuss. The website is easy to use and straightforward to order from. It’s especially helpful that it shows real‑time availability, so we don’t need to call to confirm whether parts will arrive.
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Full Range: Carmex Carbide Tiny Tools - Boring Bars - BMK Grade (MTR)

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You are viewing MTR4R0.05L22BMK. Click any other SKU to view its full details.

Product SKUMinimum DiameterReachRadiusGradeHolderPriceStock Order
MTR1.2R0L7BMK 1.270BMKSIM****H3£25.49 In Stock
MTR1.2R0L9BMK 1.290BMKSIM****H3£25.49 5 days
MTR1.5R0.1L6BMK 1.560.1BMKSIM****H3£25.49 5 days
MTR1.5R0L6BMK 1.560BMKSIM****H3£25.49 5 days
MTR1R0.05L4BMK 140.05BMKSIM****H3£25.49 5 days
MTR1R0.05L6BMK 160.05BMKSIM****H3£25.49 5 days
MTR1R0L6BMK 160BMKSIM****H3£25.49 5 days
MTR2.5R0.1L10BMK 2.5100.1BMKSIM****H4£23.17 5 days
MTR2.5R0.1L15BMK 2.5150.1BMKSIM****H4£24.30 In Stock
MTR2.5R0L10BMK 2.5100BMKSIM****H4£23.17 In Stock
MTR2R0.05L10BMK 2.1100.05BMKSIM****H3£20.98 In Stock
MTR2R0.05L5BMK 2.150.05BMKSIM****H3£24.28 5 days
MTR2R0.15L10BMK 2.1100.15BMKSIM****H3£23.17 5 days
MTR2R0.15L5BMK 2.150.15BMKSIM****H3£23.17 5 days
MTR2R0.1L10BMK 2.1100.1BMKSIM****H3£24.28 5 days
MTR2R0.1L15BMK 2.1150.1BMKSIM****H3£24.28 5 days
MTR2R0L10BMK 2.1100BMKSIM****H3£24.28 5 days
MTR3R0.05L10BMK 3.1100.05BMKSIM****H3£23.17 5 days
MTR3R0.05L15BMK 3.1150.05BMKSIM****H3£25.17 5 days
MTR3R0.1L10BMK 3.1100.1BMKSIM****H3£25.17 5 days
MTR3R0.1L15BMK 3.1150.1BMKSIM****H3£25.17 In Stock
MTR3R0.2L10BMK 3.1100.2BMKSIM****H3£23.17 In Stock
MTR3R0.2L15BMK 3.1150.2BMKSIM****H3£25.17 In Stock
MTR4R0.05L15BMK 4.1150.05BMKSIM****H3£25.61 5 days
MTR4R0.05L22BMK Viewing4.1220.05BMKSIM****H4£26.86 5 days
MTR4R0.1L10BMK 4.1100.1BMKSIM****H4£23.71 In Stock
MTR4R0.1L15BMK 4.1150.1BMKSIM****H4£25.61 5 days
MTR4R0.1L22BMK 4.1220.1BMKSIM****H4£26.89 In Stock
MTR4R0.2L10BMK 4.1100.2BMKSIM****H4£23.71 5 days
MTR4R0.2L15BMK 4.1150.2BMKSIM****H4£25.63 5 days
MTR4R0.2L22BMK 4.1220.2BMKSIM****H4£26.89 In Stock
MTR4R0.2L30BMK 4.1300.2BMKSIM****H4£30.48 5 days
MTR5R0.05L15BMK 5.1150.05BMKSIM****H5£26.20 5 days
MTR5R0.1L15BMK 5.1150.1BMKSIM****H5£26.22 5 days
MTR5R0.1L22BMK 5.1220.1BMKSIM****H5£29.89 5 days
MTR5R0.1L30BMK 5.1300.1BMKSIM****H5£33.92 In Stock
MTR5R0.2L10BMK 5.1100.2BMKSIM****H5£26.20 5 days
MTR5R0.2L15BMK 5.1150.2BMKSIM****H5£26.20 In Stock
MTR5R0.2L22BMK 5.1220.2BMKSIM****H5£29.89 5 days
MTR5R0.2L30BMK 5.1300.2BMKSIM****H5£33.92 5 days
MTR5R0.2L40BMK 5.1400.2BMKSIM****H5£33.90 5 days
MTR6R0.05L15BMK 6.1150.05BMKSIM****H6£26.91 5 days
MTR6R0.05L22BMK 6.1220.05BMKSIM****H6£29.64 5 days
MTR6R0.1L15BMK 6.1150.1BMKSIM****H6£26.91 5 days
MTR6R0.1L22BMK 6.1220.1BMKSIM****H6£30.48 5 days
MTR6R0.2L15BMK 6.1150.2BMKSIM****H6£26.91 5 days
MTR6R0.2L22BMK 6.1220.2BMKSIM****H6£30.48 In Stock
MTR6R0.2L30BMK 6.1300.2BMKSIM****H6£34.42 In Stock
MTR6R0.2L35BMK 6.1350.2BMKSIM****H6£37.02 In Stock
MTR6R0.2L40BMK 6.1400.2BMKSIM****H6£37.91 5 days
MTR7R0.2L22BMK 7.1220.2BMKSIM****H7£32.47 5 days
MTR7R0.2L30BMK 7.1300.2BMKSIM****H7£35.94 In Stock
MTR8R0.2L15BMK 8.1150.2BMKSIM****H8£32.40 5 days
MTR8R0.2L22BMK 8.1220.2BMKSIM****H8£36.58 5 days
MTR8R0.2L35BMK 8.1350.2BMKSIM****H8£38.87 5 days
MTR10R0.2L35BMK 10.1350.2BMKSIM****H10£41.21 5 days
MTL1.2R0L7BMK 1.270BMKSIM****H3£25.49 5 days
MTL1.2R0L9BMK 1.290BMKSIM****H3£25.49 5 days
MTL1.5R0.1L6BMK 1.560.1BMKSIM****H3£25.49 5 days
MTL1.5R0L6BMK 1.560BMKSIM****H3£25.49 5 days
MTL10R0.2L35BMK 10.1350.2BMKSIM****H10£41.21 5 days
MTL1R0.05L4BMK 140.05BMKSIM****H3£25.49 5 days
MTL1R0.05L6BMK 160.05BMKSIM****H3£25.49 5 days
MTL1R0L6BMK 160BMKSIM****H3£25.49 5 days
MTL2.5R0.1L10BMK 2.5100.1BMKSIM****H3£23.15 5 days
MTL2.5R0.1L15BMK 2.5150.1BMKSIM****H3£24.31 5 days
MTL2.5R0L10BMK 2.5100BMKSIM****H3£23.15 5 days
MTL2R0.05L10BMK 2.1100.05BMKSIM****H3£24.28 5 days
MTL2R0.05L5BMK 2.150.05BMKSIM****H3£24.27 5 days
MTL2R0.15L10BMK 2.1100.15BMKSIM****H3£23.17 5 days
MTL2R0.15L5BMK 2.150.15BMKSIM****H3£23.17 5 days
MTL2R0.1L10BMK 2.1100.1BMKSIM****H3£24.27 5 days
MTL2R0.1L15BMK 2.1150.1BMKSIM****H3£24.27 5 days
MTL2R0L10BMK 2.1100BMKSIM****H3£24.27 5 days
MTL3R0.05L10BMK 3.1100.05BMKSIM****H3£23.17 5 days
MTL3R0.05L15BMK 3.1150.05BMKSIM****H3£25.17 5 days
MTL3R0.1L10BMK 3.1100.1BMKSIM****H3£25.17 5 days
MTL3R0.1L15BMK 3.1150.1BMKSIM****H3£25.17 5 days
MTL3R0.2L10BMK 3.1100.2BMKSIM****H3£23.17 5 days
MTL3R0.2L15BMK 3.1150.2BMKSIM****H3£25.17 5 days
MTL4R0.05L15BMK 4.1150.05BMKSIM****H3£25.61 5 days
MTL4R0.05L22BMK 4.1220.05BMKSIM****H4£26.86 5 days
MTL4R0.1L10BMK 4.1100.1BMKSIM****H4£23.71 5 days
MTL4R0.1L15BMK 4.1150.1BMKSIM****H4£25.61 5 days
MTL4R0.1L22BMK 4.1220.1BMKSIM****H4£26.89 5 days
MTL4R0.2L10BMK 4.1100.2BMKSIM****H4£23.71 5 days
MTL4R0.2L15BMK 4.1150.2BMKSIM****H4£25.61 5 days
MTL4R0.2L22BMK 4.1220.2BMKSIM****H4£26.89 5 days
MTL4R0.2L30BMK 4.1300.2BMKSIM****H4£30.45 5 days
MTL5R0.05L15BMK 5.1150.05BMKSIM****H5£26.20 5 days
MTL5R0.1L15BMK 5.1150.1BMKSIM****H5£26.20 5 days
MTL5R0.1L22BMK 5.1220.1BMKSIM****H5£29.89 5 days
MTL5R0.1L30BMK 5.1300.1BMKSIM****H5£33.92 5 days
MTL5R0.2L10BMK 5.1100.2BMKSIM****H5£26.18 5 days
MTL5R0.2L15BMK 5.1150.2BMKSIM****H5£26.20 5 days
MTL5R0.2L22BMK 5.1220.2BMKSIM****H5£29.89 5 days
MTL5R0.2L30BMK 5.1300.2BMKSIM****H5£33.92 5 days
MTL5R0.2L40BMK 5.1400.2BMKSIM****H5£33.90 5 days
MTL6R0.05L15BMK 6.1150.05BMKSIM****H6£26.91 5 days
MTL6R0.05L22BMK 6.1220.05BMKSIM****H6£29.65 5 days
MTL6R0.1L15BMK 6.1150.1BMKSIM****H6£26.91 5 days
MTL6R0.1L22BMK 6.1220.1BMKSIM****H6£30.48 5 days
MTL6R0.2L15BMK 6.1150.2BMKSIM****H6£26.30 5 days
MTL6R0.2L22BMK 6.1220.2BMKSIM****H6£25.58 5 days
MTL6R0.2L30BMK 6.1300.2BMKSIM****H6£34.46 5 days
MTL6R0.2L35BMK 6.1350.2BMKSIM****H6£37.02 5 days
MTL6R0.2L40BMK 6.1400.2BMKSIM****H6£37.91 5 days
MTL7R0.2L22BMK 7.1220.2BMKSIM****H7£32.47 5 days
MTL7R0.2L30BMK 7.1300.2BMKSIM****H7£35.97 5 days
MTL8R0.2L15BMK 8.1150.2BMKSIM****H8£32.40 5 days
MTL8R0.2L22BMK 8.1220.2BMKSIM****H8£36.58 5 days
MTL8R0.2L35BMK 8.1350.2BMKSIM****H8£38.87 5 days

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