Buy S08K-STWPR09 CNC Internal Boring Bar Tool Holder | Precision 60° Cutting Edge with Alloy Steel Build
Price shown is a starting point. Contact us for a precise quote based on your requirements.
Overview
The S08K-STWPR09 CNC Internal Boring Bar Tool Holder is designed to deliver precise and reliable performance for internal boring operations. With a 60° cutting edge angle and an 11° relief angle, this tool holder provides optimal cutting efficiency. Constructed from high-quality alloy steel, it features an 8mm handle diameter and a total length of 125mm, making it both durable and easy to maneuver.
Features and Specifications
- Model: S08K-STWPR09
- 60° cutting edge angle and 11° relief angle.
- Material: alloy steel
- Type: S-Type (Screw-type)
- Handle Diameter: 8mm
- Total Length: 125mm
- Cutting Blade Length: 9mm
- Screw Size: M2.5*6
- Wrench: T8
- Compatible Blades: TCMT090202 TCMT090204
Package Includes:
- S08K-STWPR09 Lathe Tool Holder
- Compatible Screws, and Wrenches
Application
The S08K-STWPR09 tool holder is ideal for precise internal boring tasks in CNC lathes and machine tools. Its design and construction make it suitable for various machining applications, providing reliable and accurate performance.
BEYOND S08K-STWPR09 Internal Turning Tools Holder S08K STWPR09 STWPR 09 Boring Bar CNC Lathe Cutter Machine STWPR Carbide Inserts TPMT0902 TPMT090202
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Precision Cutting with a 60° Edge Angle and 11° Relief
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Robust Alloy Steel Construction with 8mm Handle Diameter
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Compact and Efficient Design with a 125mm Total Length
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Easy Adjustment with M2.5*6 Screws and T8 Wrench
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Compatible with TCMT090202 and TCMT090204 Carbide Inserts
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Optimized for CNC Lathes and Machine Tools
5-Point Description
- High Precision: 60° cutting edge angle and 11° relief for accurate internal boring.
- Durable Construction: Alloy steel material ensures long-lasting performance.
- Compact Design: 8mm handle diameter and 125mm total length for enhanced control.
- Versatile Compatibility: Works with TCMT090202 and TCMT090204 carbide inserts.
- Efficient Adjustment: Includes M2.5*6 screws and T8 wrench for easy setup.


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.