S25S-MTJNR16 CNC Boring Bar Tool Holder | Precision Tool for CNC Lathe Internal Turning
Price shown is a starting point. Contact us for a precise quote based on your requirements.
S25S-MTJNR16 CNC Boring Bar Tool Holder
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Buy S20R-MTJNR16 CNC Boring Bar Holder | Alloy Steel, M-Type
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Precision Machining Tool for CNC Lathes
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S25S-MTJNR16 Material,Specifications and Dimensions
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DNMG Insert Compatibility
Product Name:S25S-MTJNR16 CNC Boring Bar Tool Holder
Overview:The S25S-MTJNR16 CNC Boring Bar Tool Holder is designed for precision internal turning operations on CNC lathes. Crafted from durable alloy steel, it features a 93° cutting edge angle and 0° relief angle, optimizing performance with TNMG inserts (TNMG160404, TNMG160408, TNMG160412, TNMG160416, TNMG331, TNMG332, TNMG333). This tool holder includes essential accessories like the CTM511 pin, HL1810 clamp, and ML0620 screw, along with L2.0 and L3.0 wrenches, ensuring ease of use and setup.
Specifications and Dimensions:
- Material: Alloy Steel
- Model: S25S-MTJNR16
- Handle Diameter: 25mm
- Total Length: 250mm
- Length of Cutting Blade: 12mm
- Included Inserts: TNMG160404, TNMG160408, TNMG160412, TNMG160416, TNMG331, TNMG332, TNMG333
- Accessories: CTM511 pin, HL1810 clamp, ML0620 screw, L2.0, L3.0 wrenches
Application: Ideal for professionals in CNC machining, the S25S-MTJNR16 excels in internal turning tasks with its precise cutting geometry and robust construction.
Advantages:
- Precision Cutting: 93° cutting edge angle enhances accuracy in internal turning applications.
- Durable Build: Made from high-quality alloy steel for long-lasting performance.
- Versatile Compatibility: Compatible with a range of TNMG inserts for flexibility in machining tasks.
- Easy Setup: Includes CTM511 pin, HL1810 clamp, ML0620 screw, and L2.0/L3.0 wrenches for convenient installation.
- Enhanced Productivity: Optimizes CNC lathe operations for increased efficiency and quality.
5-point description:
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Precision Machining: Designed for CNC lathes, this tool holder offers precise internal turning capabilities, ensuring accurate machining results.
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Durable Construction: Made from high-quality alloy steel, the S25S-MTJNR16 is robust and reliable, suitable for long-term use in demanding machining environments.
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Optimized Cutting Geometry: Featuring a 93° cutting edge angle and 0° relief angle, it maximizes cutting efficiency and tool life, enhancing productivity.
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Comprehensive Accessory Package: Includes essential accessories like CTM511 pin, HL1810 clamp, ML0620 screw, and L2.0/L3.0 wrenches, facilitating easy setup and operation.
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Versatile Insert Compatibility: Compatible with various TNMG inserts (TNMG160404, TNMG160408, TNMG160412, TNMG160416, TNMG331, TNMG332, TNMG333), offering flexibility for different machining tasks.
The key strengths of the S25S-MTJNR16 CNC Boring Bar Tool Holder, focusing on precision, durability, efficiency, ease of use, and versatility.


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.