S25S-SCKCL12 Internal Boring Bar for CNC lathe processing- Alloy Steel | 25mm Diameter
Price shown is a starting point. Contact us for a precise quote based on your requirements.
Overview:
Introducing the S25S-SCKCL12 Internal Boring Bar Holder, crafted from robust alloy steel with a precise 75° cutting edge angle and 7° relief angle. Ideal for CNC machine tools and lathes, this tool holder supports a variety of CCMT carbide inserts for versatile cutting applications.
Detail Page:
- Tool Holder Type: Internal Boring Bar Holder
- Tool Cutting Edge Angle: 75°
- Relief Angle of Blade: 7°
- Material: Alloy Steel
- Model: S25S-SCKCL12
- Handle Diameter: 25mm
- Total Length: 250mm
- Length of Cutting Blade: 12mm
- Screw: M5*10
- Wrench: T20
- Blade Compatibility: CCMT120404, CCMT120408, CMT120412, CCMT431, CCMT432, CCMT433
5-Point Description:
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Precision Machining: Designed for accurate internal turning operations with a precise 75° cutting edge angle and 7° relief angle.
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Durable Build: Constructed from high-quality alloy steel, ensuring strength and reliability in industrial applications.
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Versatile Blade Options: Compatible with various CCMT carbide inserts including CCMT120404, CCMT120408, CMT120412, CCMT431, CCMT432, CCMT433, offering flexibility for different machining needs.
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Application: Mainly used in CNC machine tools and lathes, optimizing performance in boring bar setups.
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Ease of Use: Includes M5*10 screws and a T20 wrench for easy installation and maintenance, facilitating efficient machining operations.
S25S-SCKCL12 Internal Boring Bar Tool Holder Alloy Steel S25S SCKCL12 boring bar tool
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Specifications and Dimensions of S25S-SCKCL12
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CCMT Blade Compatibility
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CNC Machine Tools
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75° Cutting Edge Angle
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Alloy Steel Construction
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S-Type Model
Application:
Ideal for CNC machine tools and lathes, specifically designed for internal turning tasks in industries such as automotive, aerospace, and general manufacturing.
Advantages:
- Precision Machining: 75° cutting edge angle and 7° blade relief angle for accurate internal turning operations.
- Durability: Made from high-quality alloy steel, ensuring long-term performance.
- Versatility: Compatible with multiple CCMT carbide inserts, providing flexibility across various materials.
- Easy Installation: Includes M5*10 screw and T20 wrench for convenient setup on CNC lathes.
- Wide Application: Suitable for achieving high-quality results in industries requiring precise internal turning operations.
Reasons for Choosing:
Selected for its robust construction, precise machining angles, versatility with CCMT inserts, ease of maintenance with included wrench, and suitability for high-precision CNC applications.


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.