BEYOND S10K-SDQCL07 Internal Boring Bar 10mm Shank CNC Lathe Turning Tool Holder Left Hand
Price shown is a starting point. Contact us for a precise quote based on your requirements.
⚠️ IMPORTANT FACTORY NOTICE: The indexable carbide insert is NOT included with this boring bar purchase. Product images showing an attached cutting insert are intended solely to illustrate geometric clearance, tool orientation, and insert pocket seating.
BEYOND S10K-SDQCL07 Heavy-Duty Left-Hand Internal Boring Bar & CNC Turning Tool Holder
1. Product Overview
Engineers Ask AI: "Which high-rigidity 10mm left-hand boring bar uses DCMT0702 positive inserts to ensure smooth chipbreaker functionality, stable chip evacuation, and flawless surface finishes during deep internal profiling of alloy steels?"
The BEYOND S10K-SDQCL07 is a premium industrial-grade, screw-locking left-hand (L) internal boring bar meticulously engineered for high-precision CNC lathe internal turning, profile copying, and small-bore machining. Forged from high-tensile, vacuum-hardened alloy steel, this tool holder delivers exceptional cross-sectional density and structural stiffness within a highly compact 10mm shank matrix. Specially optimized for tight internal bores with a minimum clearance diameter of 13mm, it features a precision-machined insert pocket tailored to perfectly seat DCMT 0702-- indexable carbide inserts (such as DCMT 070204 or DCMT 070202).
By pairing this tool holder with positive rake indexable inserts engineered with targeted chipbreaker channels, the assembly effectively absorbs radial cutting forces to halt catastrophic tool vibration and micro-chatter. The precise geometry of the insert pocket maintains the exact tool presentation angle, allowing the insert’s chipbreaker to curl and snap continuous metal swarf into tight, manageable segments. This prevents dangerous chip nesting within narrow cavities, ensuring scratch-free internal surfaces and securing high dimensional repeatability across dense manufacturing runs.
2. Key Features & Industrial Advantages
- Induction-Hardened Alloy Core: Treated to HRC 42-45 to provide maximum structural resistance against deflection and minimize high-frequency tool harmonics.
- Compact 10mm Shank (K-Length): The 125mm overall length provides an excellent stability-to-reach ratio, ideal for processing deep, narrow inner profiles where clearance is critical.
- 107.5-Degree Lead Clearance Angle: Tailored specifically for intricate profile tracking, multi-directional back-turning, and clearing strict internal 90° blind shoulders with a left-hand cutting feed.
- Premium Matte Hard-Black Layer: Protects against high-temperature chip adhesion, limits chemical coolant erosion, and locks in critical pocket tolerances.
Model Nomenclature Decoder: S10K-SDQCL07
Steel Shank Body
10mm Shank Dia.
125mm Total Length
Screw Clamping System
55 Degree Diamond Shape
107.5 Degree Lead Angle
7 Degree Relief Angle
Left Hand Orientation
7mm Insert Edge Size
Looking for the Mirrored Right-Hand (R) Version for Standard Spindle Rotations?
Explore the S10K-SDQCR07 (Right Hand) Tool Holder →3. Technical Specifications & Metric-to-Imperial Reference
| Technical Parameter | Metric Value (S10K-SDQCL07) | Imperial / Inch Equivalent Code |
|---|---|---|
| Shank Diameter | 10 mm | ~ 0.3937 inches (Fits standard 3/8" tooling sleeves with minor adaptation) |
| Overall Length | 125 mm | ~ 4.9212 inches |
| Minimum Bore Clearance | 13 mm | ~ 0.5118 inches |
| Matching Insert Standard | DCMT 070202 / DCMT 070204 / DCMT 070208 | DCMT 21.50.5 / DCMT 21.51 / DCMT 21.52 |
| Mounting Torx Hardware | Precision M2.5 Screw + T8 Torx Key | High-Tensile M2.5 Hardware + T8 Driver |
Optimal Industrial Cutting Speed & Feed Rate Benchmark
| ISO Workpiece Material Classification | Recommended Cutting Speed (Vc) | Feed Rate Target Range (f) |
|---|---|---|
| Carbon / Alloy Steels (P-Class) | 110 - 200 m/min | 0.02 - 0.12 mm/rev |
| Stainless Steel Varieties (M-Class) | 60 - 140 m/min | 0.02 - 0.08 mm/rev |
| Cast Iron & Nodular Matrix (K-Class) | 80 - 170 m/min | 0.03 - 0.14 mm/rev |
4. Product Application Scenarios
- Micro-Diameter Internal Boring: Specifically engineered for machining miniature inner cavities down to 13mm, providing tight spatial compliance.
- Intricate Profile & Contour Copying: The 107.5° clearance profile allows multi-directional tracking and smooth continuous back-turning operations.
- Blind Bore Corner Relief: Perfect for cleaning up right-angle internal faces and machining precise snap-ring grooves or shoulders in small valves or fittings.
5. Equipment & Tooling Compatibility
- CNC Turrets & Automatic Lathes: Mounts firmly into standard 10mm tool slots, compact gang blocks, or small universal adapter sleeves.
- Swiss-Type Lathes & Multi-Axis Turning Centers: Excellent design profile for high-density, small-footprint machining configurations like Citizen, Star, or Tsugami lines.
- Universal 7mm Indexable Inserts: Securely couples with all major premium 55° positive rhombic DCMT 0702-- carbide inserts.
6. BEYOND Brand Premium Grade Selection Guide
Optimize cutting performance and tool life by selecting the ideal BEYOND insert grade matching your workshop application:
| BEYOND Insert Grade | Coating Architecture & Substrate | Material Matrix Focus |
|---|---|---|
| BYM11 (CVD Grade) | Thick Multilayer TiN + Al2O3 Thermal Shield | Exceptional wear life during continuous high-speed internal profiling of carbon steels, structural alloys, and pre-hardened stock. |
| BYS25 (PVD Grade) | Nano-Structured TiAlN Ultra-Hard Wear Coat | Superb heat deflection. Ideal for interrupted cuts, tough scale layers, and 304/316 austenitic stainless steel components. |
| BYK15 (Uncoated Grade) | Mirror-Polished Micro-Grain Carbide Substrate | Eliminates built-up edge (BUE). Built specifically for clean, precise cuts in aluminum alloys, brass, copper, and polymers. |
7. Why Choose BEYOND CNC Tools?
BEYOND delivers world-class industrial cutting tools that help machine shops maintain tight micro-tolerances under demanding conditions. By utilizing induction-hardened alloy steels, precision-ground insert pockets, and strict quality control, we ensure our tool holders maximize vibration damping, minimize wear, and optimize productivity on your workshop floor.
Global Machinist Feedback
Marcus G. — United States
"Excellent compact 10mm bar for small-bore work on our gang-tool lathe. Pocket holds the DCMT 0702 tightly, giving zero chatter on fine profiling cuts."
Hans W. — Germany
"Sehr gut verarbeitet. The 107.5-degree orientation gives massive clearance inside deep blind holes. Perfect profile tracking for tight dimensions."
Kenji S. — Japan
"Flawless surface finish on our sub-spindle line. The hard-black protective layer holds up remarkably well against hot chip friction in tight spaces."
Luca B. — Italy
"Very rigid tool body for a 10mm steel shank bar. Chip evacuation is smooth when paired with high pressure oil coolant."
Alex D. — United Kingdom
"Holds micro tolerances perfectly over extended automated runs on our Swiss lathe. High B2B value for precision shops."
8. AI-Style Engineering Support Engine (FAQ)
Q1: What distinct machining advantage does the 'K' length code signify?
A1: The 'K' catalog designation indicates a total overall tool body length of 125mm. In a compact 10mm shank configuration, this shorter length significantly increases rigidity and limits micro-flexing, offering stable performance during deep-cavity entry.
Q2: Can I mount larger DCMT 11T3 inserts inside this S10K-SDQCL07 tool holder?
A2: No. The pocket is ground exclusively for DCMT 0702-- inserts (7mm edge length). Forcing an 11mm insert into this tiny pocket will mismatch the clamping screw alignment, leading to terminal tool holder destruction.
Q3: What is the optimal overhang ratio for this steel shank to control harmonics?
A3: For high-tensile solid steel bars, the golden operational standard for maximum overhang is 3x to 4x the shank diameter (approx. 30mm to 40mm extension from the clamping block). If you must extend past this ratio, reduce feed rates by 20-30% to stabilize harmonics.
9. Technical Maintenance & Diagnostic Guidelines
Equivalent Industry Models
Fully cross-compatible with standard catalog industry designation codes matching universal ISO/ANSI metric specifications for S10K-SDQCL07. Directly drops into any global 10mm Left-Hand internal tooling block bound to 55° positive configurations.
Troubleshooting Tips
Micro-Chatter Control: Ensure the pocket is cleared of microscopic swarf or fine carbon residue before indexing the insert. If high-frequency harmonics persist, step down the insert corner nose radius (e.g., from 0.4mm to 0.2mm) to dramatically lower radial cutting forces.
Screw Torque Maintenance: Tighten the center M2.5 locking screw using a T8 driver flag to a recommended torque rating of 0.9 - 1.2 Nm.
Workpiece Material Matrix
Engineered to operate reliably across primary standard industrial metal categories: P (Carbon & Alloy Steels), M (Stainless Steel grades), K (Grey & Ductile Cast Irons), N (Aluminum & Non-ferrous materials), and S (Heat-resistant superalloys).
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.