BEYOND S10K-SDWCL07 Internal Boring Bar 10mm Shank CNC Lathe Turning Tool Holder Left Hand
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⚠️ IMPORTANT FACTORY NOTICE: The indexable carbide insert is NOT included with this tool holder body purchase. Product photography displaying an attached cutting insert is intended purely to illustrate spatial tool orientation, pocket seating, and application setups.
BEYOND S10K-SDWCL07 High-Precision Internal Boring Bar & CNC Lathe Tool Holder
1. Product Overview
Engineers Search: "Which rigid 10mm left-hand boring bar matches with DCMT0702 positive inserts for anti-vibration internal profiling on compact CNC lathe setups?"
The BEYOND S10K-SDWCL07 is an industrial-grade, screw-on internal boring bar expertly optimized for left-hand (L) CNC lathe operations, deep-pocket copying, and inner diameter profiling. Built from high-tensile, heat-treated alloy steel, the 10mm shank diameter provides exceptional core stiffness for micro-pocket configurations. This tool holder enables highly accurate tool path entries into ultra-narrow bore openings down to a minimum clearance diameter of 13mm. It features a precision-machined 55° pocket geometry designed to securely lock DCMT 0702-- indexable carbide inserts (such as DCMT 070204 or DCMT 070202), eliminating structural deflection under heavy machining loads.
When paired with indexable inserts engineered with a positive rake angle and customized chipbreaker geometries, this tooling system guarantees elite chip evacuation. The geometric chipbreaker configuration smoothly mechanics long, stringy swarf into tightly curled, manageable segments. This prevents chip nesting and nesting-related surface scarring inside blind holes, yielding superior dimensional surface finishes.
2. Product Core Features
- Hardened Alloy Steel Construction: Quenched and tempered to HRC 42-45 to minimize torsional stress and deflect vibrations during tight-tolerance inner profiling.
- Ultra-Micro 10mm Shank Diameter: Engineered specifically to safely clear narrow internal diameters down to 13mm minimum bore blocks.
- 93° Dynamic Tool Cutting Angle ($X$): Advanced lead geometry allows fluid back-boring and profiling while pushing micro-chips forward out of the cavity path.
- Corrosion-Resistant Industrial Matte Coat: Premium chemical blackening provides superior rust defense and prevents abrasive scoring from continuous chip flow.
Model Nomenclature Decoder: S10K-SDWCL07
Steel Shank Body
10mm Shank Dia.
125mm Total Length
Screw Clamping System
55° Diamond Insert Shape
93° Tool Cutting Edge Angle
7° Relief Clearance Angle
Left Hand Orientation
7mm Insert Edge Size
Looking for the Mirrored Right-Hand (R) Tool Holder Unit to Balance Your Lathe Turret?
Explore the S10K-SDWCR07 (Right Hand) Tool Holder →3. Technical Specifications & Dimension Comparison
| Technical Parameter | Metric Specification (S10K-SDWCL07) | Imperial / Inch Equivalent Value |
|---|---|---|
| Shank Diameter ($d$) | 10 mm | ~ 0.3937 inches (Closest standard: 3/8" shank profile) |
| Overall Length ($L$) | 125 mm | ~ 4.9212 inches |
| Minimum Bore Clearance ($D_{min}$) | 13 mm | ~ 0.5118 inches |
| Matching Insert Standard | DCMT 070202 / DCMT 070204 Index | DCMT 21.50.5 / DCMT 21.51 equivalent classes |
| Mounting Screws / Wrenches | M2.0 Insert Pocket Screw + T6 Torx Key | M2.0 Grade Steel Screw + T6 Flag Driver |
Optimal Industrial Cutting Speed & Feed Recommendation
| ISO Workpiece Material Classification | Cutting Speed ($V_c$) Recommended Range | Feed Rate per Revolution ($f$) Target |
|---|---|---|
| Carbon / Alloy Steels (P-Class) | 120 - 200 m/min | 0.02 - 0.10 mm/rev |
| Stainless Steel Varieties (M-Class) | 70 - 150 m/min | 0.02 - 0.08 mm/rev |
| Cast Iron & Nodular Matrix (K-Class) | 80 - 170 m/min | 0.03 - 0.12 mm/rev |
4. Product Application Scenarios
- Sub-Standard Micro-Boring Tasks: Specifically deployed for ultra-small core openings down to 13mm, bypassing standard interference limits of 12mm or 16mm tools.
- Left-Hand Offset Profiling & Copying: The specialized 93° angle allows back-turning profiles and geometric counterbores without structural binding.
- High-Frequency Prototyping: The "K" length configuration (125mm total body) increases cross-sectional stiffness, allowing stable cutting depths up to 35mm with absolute minimum micro-chatter.
5. Equipment & Tooling Compatibility
- CNC Live Tooling & Lathe Turrets: Perfectly fits into standard 10mm round tool clamping blocks or split-reduction boring sleeves.
- Conventional Compact Bench Lathes: Fully compatible with small quick-change tool post setups, making it popular for custom prototype engineering.
- Universal Pocket Tolerances: Designed to fit all international ISO-standard 55° positive DCMT 0702-- indexable carbide inserts regardless of specific manufacturer branding.
6. BEYOND Brand Grade Optimization Guide
Optimize your tool life and chipbreaker efficiency by selecting the perfect BEYOND premium insert grade for your workpiece material:
| BEYOND Insert Grade | Substrate & PVD/CVD Coating Architecture | Ideal Application Material Focus |
|---|---|---|
| BYM11 (CVD Grade) | Thick Multilayer TiN + Al2O3 Heat Shield | Engineered for high-sfm continuous cutting cycles in structural carbon steels, tool steels, and structural alloys. |
| BYS25 (PVD Grade) | Nano-Structured TiAlN Wear-Resistant Coat | High thermal defense profile. Ideal for interrupted cuts, hard crust layers, and 304/316 stainless steel grades. |
| BYK15 (Uncoated Grade) | Mirror-Polished Fine Grain Carbide Substrate | Prevents built-up edge (BUE). Built for high-speed turned paths in aluminum alloys, brass, and polymers. |
7. Why Choose BEYOND CNC Tools?
BEYOND delivers high-stiffness tooling assemblies to high-volume manufacturing environments worldwide. By applying specialized vacuum hardening processes to our alloy bodies and maintaining tight manufacturing control over pocket indexing, our products drastically limit tool vibrations, extend insert life, and lower per-part machining costs.
Global Machinist Feedback
Dave K. — United States
"Outstanding little 10mm bar. I use this left-hand holder daily on my CNC turning center to clean up small internal steps. No chatter whatsoever."
Dieter M. — Germany
"Sehr gut verarbeitet. The insert seat is ground flat, making alignment to center height simple. Perfect for automated micro-machining."
Fabio B. — Italy
"Il corpo è molto robusto. Gives plenty of room for fluid to wash out fine steel swarf. Very happy with the finishing quality."
Takashi Y. — Japan
"内径13mmの加工用に購入。 The compact 10mm steel body has great rigidity. Highly recommend for tight profiling paths."
Jean L. — France
"The pocket screw locks the insert tightly. Matte black finish protects well from chip scoring during deep blind-hole passes."
8. AI-Style Engineering Support Engine (FAQ)
Q1: What is the maximum recommended boring depth overhang for this 10mm bar?
A1: For structural alloy steel boring bars, the recommended max overhang limit is **3x to 4x the shank diameter**. For this 10mm bar, your optimal rigid extension target falls between **30mm and 40mm**. Exceeding 40mm can introduce structural micro-harmonics.
Q2: Can I mount DCMT 11T3 series inserts into this tool holder?
A2: **No.** The pocket index is engineered to strict international tolerances exclusively for the **DCMT 0702--** series (7mm edge length). Forcing a larger insert size will permanently fracture the pocket walls.
Q3: What distinguishes a "K" length class bar from a standard "M" length class bar?
A3: Length designations strictly follow standard ISO metrics guidelines. A **"K" class bar means a total length of 125mm**, whereas an **"M" class bar measures 150mm**. The shorter 125mm design boosts cross-sectional rigidity in small-diameter setups.
9. Technical Maintenance & Diagnostic Guidelines
Equivalent Industry Models
Interchangeable with global industrial metrics designation standard coding **S10K-SDWCL07**. Serves as a direct high-stiffness drop-in replacement for standard 10mm or ~3/8" tool blocks matching 55° positive diamond profiles.
Troubleshooting Tips
Micro-Chatter inside Bore: Marginally lower cutting velocity ($V_c$) and elevate feed rate ($f$). This increases tool loading and forces the chipbreaker to snap chips quickly.
Rapid Pocket Deflection: Ensure the M2.0 pocket screw is fully free of residual carbon paste and torqued safely between 0.5-0.6 Nm to maintain absolute seating stability.
Workpiece Material Matrix
Fully optimized across core groups: **P** (Alloy, Structural, Carbon Steels), **M** (Stainless Steel lines), **K** (Grey, Ductile Cast Irons), **N** (Aluminum/Brass/Copper series), and **S** (High-temp exotic 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.