MNR Series Small Hole Boring Bar Carbide CNC Machining Tool
1. Material and process advantages
Carbide material
Made of tungsten steel (carbide), it has high hardness (HRC90+) and strong wear resistance. It can withstand high-intensity cutting tasks and has a service life that is 3-5 times longer than ordinary steel.
Overall alloy anti-seismic design
The tool bar adopts an integrated alloy structure, combined with precision heat treatment technology, which significantly improves the anti-seismic performance, reduces processing vibration, and ensures surface finish (Ra0.4μm or less)38.
2. Functional and performance advantages
Micro-aperture processing capability
Supports 0.5-10mm ultra-small aperture processing, suitable for micro parts, precision molds and other scenarios, filling the gap in micro-diameter processing that traditional boring tools cannot cover.
Adjustable diameter range
Provides multi-specification adjustable tool heads (such as MUR2R0.08L6 to MUR6R0.2L22) to meet different aperture requirements, single tool adapts to multi-size processing, and reduces the frequency of tool replacement46.
Efficient chip removal and cooling
The tool body design contains coolant channels or chip grooves, which can effectively remove chips and dissipate heat to avoid chip blockage. It is especially suitable for processing sticky materials such as stainless steel and aluminum alloy.
III. Application scenario advantages
Multi-material adaptability
Specially optimized for metals such as stainless steel, aluminum alloy, copper, etc., and can process carbide steel (such as HRC60+) and composite materials.
Multi-machine compatibility
Adaptable to CNC lathes, Swiss-Type machines, machining centers and other equipment, supports BT30/40/50 toolholder standards, and can be quickly installed without complex debugging.
The MNR series of small hole boring cutters are micro boring tools designed for precision machining, especially for small-diameter machining scenarios of CNC machine tools, Swiss-type lathes and other equipment. This series uses tungsten steel (hard alloy) as the core material, combined with an integrated anti-vibration tool bar design, which can stably process 0.5-10mm apertures and meet the precision boring needs of materials such as stainless steel, aluminum alloy, and copper.26 Its core advantage is that it fills the gap in traditional boring cutters in the field of micro-diameter machining, and has become the preferred tool for industries such as aerospace, automotive parts, and precision molds.
| D | MNR | L | L1 | R | Minimum aperture |
| 3 | D3-MNR 1.0 R0.05 L4 | 50 | 4 | 0.05 | 1.1 |
| D3-MNR 1.2 R0.05 L5 | 50 | 5 | 0.05 | 1.3 | |
| D3-MNR 1.4 R0.05 L5 | 50 | 5 | 0.05 | 1.5 | |
| D3-MNR 1.5 R0.1 L10 | 50 | 10 | 0.1 | 1.6 | |
| D3-MNR 2 R0.15 L10 | 50 | 10 | 0.15 | 2.1 | |
| D3-MNR 2 R0.15 L15 | 50 | 15 | 0.15 | 2.1 | |
| D3-MNR 3 R0.1 L10 | 50 | 10 | 0.1 | 3.1 | |
| D3-MNR 3 R0.15 L10 | 50 | 10 | 0.15 | 3.1 | |
| D3-MNR 3 R0.2 L15 | 50 | 15 | 0.2 | 3.1 | |
| 4 | D4-MNR 1.0 R0.05 L4 | 50 | 4 | 0.05 | 1.1 |
| D4-MNR 1.2 R0.05 L5 | 50 | 5 | 0.05 | 1.3 | |
| D4-MNR 1.4 R0.05 L5 | 50 | 5 | 0.05 | 1.5 | |
| D4-MNR 1.5 R0.1 L10 | 50 | 10 | 0.1 | 1.6 | |
| D4-MNR 2 R0.15 L10 | 50 | 10 | 0.15 | 2.1 | |
| D4-MNR 2 R0.15 L15 | 50 | 15 | 0.15 | 2.1 | |
| D4-MNR 3 R0.1 L10 | 50 | 10 | 0.1 | 3.1 | |
| D4-MNR 3 R0.15 L10 | 50 | 10 | 0.15 | 3.1 | |
| D4-MNR 3 R0.2 L15 | 50 | 15 | 0.2 | 3.1 | |
| D4-MNR 4 R0.1 L10 | 50 | 10 | 0.1 | 4.1 | |
| D4-MNR 4 R0.2 L10 | 50 | 10 | 0.2 | 4.1 | |
| D4-MNR 4 R0.1 L15 | 50 | 15 | 0.1 | 4.1 | |
| D4-MNR 4 R0.15 L15 | 50 | 15 | 0.15 | 4.1 | |
| D4-MNR 4 R0.2 L15 | 50 | 15 | 0.2 | 4.1 | |
| 5 | D5-MNR 5 R0.1 L15 | 50 | 15 | 0.1 | 5.1 |
| D5-MNR 5 R0.2 L15 | 50 | 15 | 0.2 | 5.1 | |
| D5-MNR 5 R0.2 L22 | 50 | 22 | 0.2 | 5.1 | |
| 6 | D6-MNR 5 R0.1 L15 | 50 | 15 | 0.1 | 5.1 |
| D6-MNR 5 R0.2 L15 | 50 | 15 | 0.2 | 5.1 | |
| D6-MNR 5 R0.2 L22 | 50 | 22 | 0.2 | 5.1 | |
| D6-MNR 6 R0.1 L15 | 50 | 15 | 0.1 | 6.1 | |
| D6-MNR 6 R0.2 L15 | 50 | 15 | 0.2 | 6.1 | |
| D6-MNR 6 R0.2 L22 | 50 | 22 | 0.2 | 6.1 | |
| 8 | D8-MTR 8 R0.2 L22 | 60 | 22 | 0.2 | 8.1 |
| D8-MNR 8 R0.2 L30 | 60 | 32 | 0.2 | 8.1 |
| Product name: | MTR small boring tool |
| Bar material: | imported tungsten steel |
| Coating: | nano coating |
| Processing conditions: | add coolant |
| Applicable materials: | stainless steel, die steel, alloy steel, cast iron, etc. with hardness below 45° |
| Applicable machine types: | CNC machining center, engraving machine, CNC machine tool |
The MNR series of small hole boring cutters have become a benchmark tool in the field of precision machining due to their miniaturized design, superb vibration resistance and multi-scenario adaptability. For manufacturers pursuing high precision and high efficiency, this series is not only the best choice for technology upgrades, but also a long-term investment solution to reduce comprehensive production costs (reducing tool loss by 30%6).
