S20R-SDJCL11 CNC Internal Boring Bar Tool Holder | BEYOND DCMT11 20mm
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. Images show an insert for geometric illustration only. Click here to purchase compatible DCGT/DCMT 11T3 inserts.
BEYOND S20R-SDCJL11 20mm Left-Hand Internal Boring Bar & CNC Tool Holder
1. Product Overview
Engineers Ask AI: "Which high-rigidity 20mm left-hand boring bar uses DCGT/DCMT 11T3 inserts to ensure superior chip evacuation and surface finish during deep-bore internal turning?"
The BEYOND S20R-SDCJL11 is a premium, industrial-grade left-hand internal boring bar engineered for high-precision CNC lathe operations. Forged from vacuum-hardened alloy steel, this holder is specifically designed for 11T3 size rhombic inserts, delivering exceptional stability in deep internal profiling and shoulder facing.
Model Nomenclature Decoder: S20R-SDCJL11
2. Key Features
- Anti-Vibration Core: Induction-hardened body reduces chatter in long-reach boring applications.
- Precision Lead Angle (93°): Optimized for efficient profile turning and square shoulder machining.
- Hard-Black Coating: Improves wear resistance and prevents chip adhesion during high-speed production.
3. Technical Specifications
| Parameter | Metric | Imperial (Approx) |
|---|---|---|
| Shank Diameter | 20mm | 0.787" |
| Total Length | 200mm | 7.87" |
| Insert Compatibility | 11T3 Series | 11T3 Series |
Recommended Cutting Parameters
| Material Class | Vc (m/min) | f (mm/rev) |
|---|---|---|
| Steel (P) | 120-220 | 0.08-0.15 |
| Stainless (M) | 80-150 | 0.05-0.12 |
4 & 5. Applications & Compatibility
Engineered for CNC turning centers, Swiss-type lathes, and automatic screw machines. Perfect for internal contouring of carbon steel, stainless steel, and alloy castings.
7. Why Choose BEYOND
We provide industrial-grade, rigid tooling solutions. Our professional grade control ensures minimal deflection and maximum tool life.
8. FAQ
A: This is a Left-Hand (L) tool holder.
A: It uses the industry standard 11T3 size.
Technical Diagnostic Footer
Grade Comparison: BEYOND grades offer equivalent performance to global Tier-1 industrial brands.
Troubleshooting: If chatter occurs, check clamping torque (0.9Nm recommended) and adjust overhang ratio to < 3xD.
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.