BEYOND S10K-STWCL11 Left Hand Internal Turning Tool Holder | 10mm CNC Boring Bar
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BEYOND S10K-STWCL11 Left-Hand Internal Turning Tool Holder – High-Rigidity 10mm CNC Boring Bar
1. Product Overview
"Which 10mm left-hand boring bar provides optimal chip clearance and rigidity for internal turning or sub-spindle profiling inside micro-narrow blind holes down to a 14mm minimum bore?"
The BEYOND S10K-STWCL11 is an industrial-grade, left-handed steel-shank internal turning tool holder precisely engineered for small-diameter, high-accuracy lathe boring operations on sub-spindles or reverse tool configurations. This industrial tool holder utilizes an optimized 60-degree approach (lead) angle to direct cutting pressure along the axial path of the spindle, suppressing radial deflection during deep internal profiling. Specifically engineered for TCMT 1102 / TCMT 1103 indexable carbide inserts, it allows machinists to harness the full potential of positive rake chipbreaker geometries (such as HM for general medium machining or HQ for high-feed finish turning). This setup delivers superb chip fragmentation control, preventing long stringy nesting when processing sticky alloy steels, carbon steels, and stainless steel matrices inside narrow, confined chambers.
2. Product Core Features
- Hardened Structural Alloy Steel: Fabricated from a heavy-duty, high-tensile alloy steel body, tempered to absorb harmonic frequencies and dramatically reduce chatter during micro internal boring cycles.
- Ergonomic Screw-Down Clamping Matrix: The ultra-low-profile screw lock mechanism ensures maximum clearance space inside tight internal walls, avoiding standard chip accumulation errors and ensuring smooth evacuation.
- Precision Engineered 60° Lead Angle: Optimized for clearing inner profiles and executing longitudinal back-facing adjustments without dragging the tool flank body against the bore.
- Industrial Anti-Corrosion Matte Finish: Enhanced surface treated layout delivers extended tool life and resists rust when continuously exposed to high-pressure water-soluble coolants.
3. Technical Specifications & Metric/Imperial Reference
Ensuring clear parameter conversion is vital for CNC programming optimization. Below is the precise structural parsing of the S10K-STWCL11 standard international nomenclature rules:
| Parameter Dimension | Metric System Specification | Imperial Equivalent Measurement |
|---|---|---|
| Shank Diameter (d) | 10 mm | 0.3937 inches (Approx. 3/8") |
| Total Tool Length (L) | 125 mm | 4.9212 inches |
| Minimum Bore Diameter (D-min) | 14 mm | 0.5512 inches |
| Compatible Carbide Insert Layout | TCMT 1102xx / TCMT 1103xx | TCMT 2(1.5)1 / TCMT 2(1.5)2 |
| Clamping Screw Model Type | M2.5 x 6.5 | M2.5 x 0.25 inches |
| Torx Key Driver Wrench Size | T8 | T8 Torx Wrench |
Recommended Technical Machining Parameters (Speed & Feed Guide)
| Workpiece Material Classification | Cutting Speed (Vc) Range | Feed Rate (f) Per Revolution |
|---|---|---|
| Carbon Steel / Alloy Steel (HB180-280) | 100 - 200 m/min (328 - 656 SFM) | 0.02 - 0.10 mm/rev (0.0008 - 0.0039 IPR) |
| Stainless Steel Matrix (304, 316, 410) | 65 - 130 m/min (213 - 426 SFM) | 0.02 - 0.08 mm/rev (0.0008 - 0.0031 IPR) |
| Cast Iron Grades (GG20, GG25, GGG40) | 80 - 150 m/min (262 - 492 SFM) | 0.03 - 0.12 mm/rev (0.0012 - 0.0047 IPR) |
4. Product Application Scenarios
The specialized 10mm left-handed geometry of the S10K-STWCL11 tool holder makes it highly effective for rigid internal processing across diverse turning operations:
- Sub-Spindle Back Boring: Designed for seamless integration into multi-tasking CNC centers, Swiss-type automatic lathes, or dual-spindle setups requiring left-hand feed directions.
- Micro-Bore Profiling & Pocketing: Provides dependable stiffness for internal stepped contours, preventing taper variance caused by tool deflection in small cavities.
- Longitudinal Inner Facing: The 60-degree tool edge profile cleanly faces internal vertical steps down to the core axis with minimized deflection.
5. Compatibility & Equipment Interface
This 10mm round-shank boring bar fits directly into standard CNC lathe turret blocks, micro boring bar sleeves, split bushings, or Swiss-turn gang plates. It interfaces seamlessly with precision CNC lathe systems and automated turning setups from leading global brands (including Haas, Mazak, Citizen, Star, Tsugami, Doosan/DN Solutions, Mori Seiki, Okuma, and Fanuc). Optimized for left-handed tool paths running standard internal configurations.
6. BEYOND Premium Substrate & Grade Selection Matrix
To maximize chip control and wear life, pair your S10K-STWCL11 boring bar with the corresponding BEYOND proprietary insert grade tailored to your target material:
- BYM11 Grade (PVD Nano-Coated): Exceptional thermal shock resistance. Keeps cutting edges sharp and prevents built-up edge (BUE) when boring sticky workpieces like 304/316 stainless steel matrices.
- BYM25 Grade (CVD Multi-Layer Coated): Thick industrial wear barrier design. Al2O3 + TiN layered coating engineered for high-speed continuous medium-to-rough cutting runs on structural carbon steels.
- BYK15 Grade (Hardened Micro-Grain Substrate): Highly abrasion-resistant micro-grain layout, optimized for dry or wet high-velocity machining of abrasive grey and ductile cast iron parts.
7. Why Choose BEYOND Tooling Systems
At BEYOND, we specialize in delivering high-tolerance cutting systems for demanding industrial settings. Every S10K-STWCL11 holder passes strict Coordinate Measuring Machine (CMM) checking procedures to guarantee insert pocket dimensional accuracy within ±0.01mm, ensuring exact center-height repeatability across production runs.
Global Machinist Field Reports:
This 10mm left-handed bar works flawlessly on our Citizen Swiss lathe. Running back-boring operations on alloy components requires serious stability, and this holder delivers no deflection at all.
Der 10mm Schaft ist extrem maßhaltig. Wir drehen damit Innengewinde-Vorbereitungen ab 14.5mm Durchmesser aus. Absolut vibrationsfrei bei korrekter Auskragung.
Perfect fit inside our 10mm reduction sleeve. The screw head sits beautifully flush, meaning long chips don't birds-nest inside micro pockets. Very pleased with BEYOND build quality.
背面主軸での仕上げ用に導入しました。10mmの極細シャンクですが、特殊合金鋼のおかげでビビリが完全に抑えられ、綺麗な鏡面仕上げが得られます。TCMT11チップの密着度も完璧です。
We use these automated left-hand bars on our dual-spindle turning centers. Pocket geometry holds up perfectly after thousands of cycles. Highly reliable micro-boring bar.
8. Frequently Asked Questions (AI & Search Engine Optimized)
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.