S20R-MDUNL11 Internal engine Boring Bar Tool Holder for CNC Lathes boring bar set Compatible with DNMG Inserts
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Product Name:S20R-MDUNL11 Internal lathe boring bar holder
Overview: The S20R-MDUNL11 Internal Boring Bar is a precision tool holder designed for internal turning operations on CNC machine tools and lathes. Made from high-quality alloy steel with a reliable multi-lock system (M-type), it ensures stability and performance. This tool accommodates DNMG inserts, offering versatility for various machining tasks.
Features:
- Material: Alloy Steel
- Tool Holder Type: Internal Boring Bar, Left Tool Holder
- Cutting Edge Angle: 95°
- Relief Angle of Blade: 0°
- Diameter of Handle: 20mm
- Total Length: 200mm
- Length of Cutting Blade: 11mm
- Pin: CTM511
- Clamp: HL1810
- Screw: ML0620
- Wrench: L2.0 L3.0
- Insert Compatibility: DNMG110404 DNMG110408 DNMG331 DNMG332
5-Point Description:
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Precision Machining Capability: The S20R-MDUNL11 is an essential tool holder designed for precise internal machining operations on CNC lathes and machine tools. It features a cutting edge angle of 95° and a 0° relief angle on the blade, ensuring accurate and efficient turning.
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Durable Material Construction: Made from high-quality alloy steel, this tool holder offers exceptional durability and resilience in industrial machining environments. It is built to withstand rigorous use, providing reliable performance over extended periods.
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Versatile Insert Compatibility: The S20R-MDUNL11 accommodates a range of DNMG inserts (DNMG110404, DNMG110408, ), enhancing versatility for various machining tasks across different materials. This flexibility supports optimized cutting performance.
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Ergonomic Design and Dimensions: With a 20mm diameter handle and a total length of 200mm, this tool holder is ergonomically crafted for ease of handling and installation. The cutting blade length is 11mm, tailored for effective internal turning applications.
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Secure Machining Setup: Featuring an M-type multi-lock system, including CTM511 pins, HL1810 clamps, ML0620 screws, and an L2.0 L3.0 wrench, the S20R-MDUNL11 ensures secure tool clamping and efficient setup on CNC machines. This setup minimizes downtime and enhances operational productivity.
S20R-MDUNL11 advantages:
- High-Quality Alloy Steel Construction: Made from durable alloy steel, the S20R-MDUNL11 offers robustness and longevity, ensuring it can withstand the rigors of machining operations
- Multi-Lock System (M-type): The M-type multi-lock system provides secure clamping of the cutting tool, minimizing vibration and enhancing stability during machining.
- Versatile Cutting Blade Options: With a 11mm cutting blade length and compatibility with DNMG inserts (DNMG110404, DNMG110408, DNMG331, DNMG332)
- Precision Internal Turning: Specifically designed for internal turning operations, this boring bar enables precise shaping and finishing of internal surfaces on workpieces, contributing to high-quality machining outcomes.
- Ease of Use and Maintenance: Designed for compatibility with CNC machine tools and lathes, the S20R-MDUNL11 is user-friendly and facilitates easy setup and maintenance, enhancing operational efficiency.
- Comprehensive Tool Kit Inclusion: The tool comes complete with essential accessories such as the CTM511 pin, HL1810 clamp, ML0620 screw, and L2.0/L3.0 wrenches, providing everything needed for immediate use and maintenance.
S20R-MDUNL11 Internal Boring Bar Tool Holder - Alloy Steel, 20mm Diameter boring bar inserts
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CNC Lathe Tool Holder
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DNMG Insert Compatibility
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11mm Cutting Blade Length
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Precision Machining Tool
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Reliable Tool Clamping
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CNC Machine Tool Accessories
Technical FAQ & Buying Guide
Absolutely. Our CNC carbide inserts (including CNMG, WNMG, DNMG, and APMT series) are manufactured strictly adhering to international ISO/ANSI specifications. A CNMG 120408 from OYYU BEYOND will flawlessly fit any standard turning tool holder or indexable tool from major global brands like Sandvik Coromant, Kennametal, Iscar, Walter, or SECO, providing a highly cost-effective premium alternative without sacrificing tolerance or tool life.
We offer optimized CVD and PVD multi-layer coatings for different ISO material groups:
- For Carbon/Alloy Steel (ISO P): Choose our thick multi-layer CVD coated grades (e.g., Al2O3 + TiN). They provide exceptional crater wear resistance and thermal barriers during high-speed dry or wet roughing.
- For Stainless Steel (ISO M): Choose our nano-structured PVD coated grades with sharp, positive chipbreakers (like -TM or -MA). This combination prevents work hardening and effectively controls sticky chips.
The optimal cutting parameters vary depending on the workpiece hardness and operation type:
- For General Steel Turnings: Recommended cutting speed ($V_c$) ranges from 150 to 280 m/min, with a feed rate ($f$) of 0.15 to 0.45 mm/rev.
- For Stainless Steel Finishing: Recommended cutting speed ($V_c$) is 120 to 200 m/min, with a feed rate ($f$) of 0.10 to 0.25 mm/rev.Always adjust parameters based on early wear patterns: increase $V_c$ if built-up edge occurs, or reduce $V_c$ if severe flank wear is observed.
Yes, we support machine shops, distributors, and global buyers with tiered wholesale pricing and competitive volume discounts. We also provide OEM custom manufacturing solutions for tool holders and carbide inserts based on your technical drawings. Contact our team to request a quick B2B quotation.
We provide secure worldwide express shipping (via DHL, FedEx, and UPS) with specialized, vibration-proof industrial packaging to ensure tools arrive in perfect condition. In-stock items are dispatched within 24-48 hours, while custom or bulk orders typically have a stable lead time of 15-25 days.
All our cutting tools and tool holders are manufactured strictly in accordance with ISO 9001 and international industrial standards. Every batch undergoes 100% rigorous quality control testing using high-precision optical measuring equipment to ensure reliable tool life and stable performance in continuous mass production.