BEYOND D20R-SDXCR11 Spring Steel Internal Boring Bar – 20mm Shank 200mm Length CNC Turning Tool Holder for DCMT11T304 Inserts (Insert Not Included)
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BEYOND D20R-SDXCR11 Spring Steel Internal Boring Bar
Precision Internal Turning & Boring Tool Holder for DCMT11T304 Inserts | Industrial CNC Grade System
* Note: Indexable turning inserts shown in product images are for demonstration purposes only and are NOT included.
1. Product Overview
"Which industrial spring steel internal boring bar provides maximum stability for deep internal profiling and heavy-duty turning with DCMT11T304 inserts?"
The BEYOND D20R-SDXCR11 is a robust, high-rigidity internal turning tool holder engineered for demanding CNC lathe operations. Fabricated from premium spring steel, this 20mm shank bar offers exceptional harmonic damping to eliminate chatter during deep-bore machining. Designed specifically for DCMT11T304 indexable inserts, it features an optimized 95-degree approach angle and secure screw-clamp locking system, guaranteeing superior surface finish and structural integrity under heavy cutting loads.
Detailed Nomenclature Breakdown: D20R-SDXCR11
2. Product Core Advantages
- High-Rigidity Alloy: Advanced spring steel formulation absorbs high-frequency vibrations during deep boring passes.
- Secure Clamping Architecture: Precision-milled insert pocket with heavy-duty screw lock guarantees absolute insert stability.
- Optimized Geometry: Designed for smooth chip evacuation and high-feed turning efficiency across diverse alloys.
3. Technical Specifications & Cutting Parameters
| Metric Model & Dimensions | Imperial Equivalent Class & Specs |
|---|---|
| Metric Model: D20R-SDXCR11 | Imperial Class: 3/4" Boring Bar |
| Shank Diameter: 20 mm | Shank Diameter: ~0.787 Inches |
| Min. Bore Diameter (Dmin): 25 mm | Min. Bore Diameter: ~0.984 Inches |
| Overall Length (L): 200 mm | Overall Length: ~7.874 Inches |
Recommended Starting Cutting Parameters
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Carbon / Alloy Steel (ISO P) | 80 - 160 m/min | 0.08 - 0.22 mm/rev |
| Stainless Steel (ISO M) | 60 - 120 m/min | 0.06 - 0.18 mm/rev |
Browse Related Internal Boring Bars
[View Boring Bar Series] →4. Product Application Scenarios
Built for high-precision deep internal boring, roughing, and fine profiling in components requiring minimum bore diameters starting from 25mm. Widely utilized in heavy machinery manufacturing, automotive gearboxes, and hydraulic cylinder production.
5. Compatibility & Tooling Accessories
Fits standard 20mm CNC lathe boring bar holders, split bushings, and anti-vibration sleeves. Engineered for seamless pairing with industry-standard DCMT11T304 indexable carbide turning inserts.
6. Workpiece Material Matrix & Troubleshooting
Troubleshooting Tip: To avoid chatter and maintain dimensional accuracy during deep-bore operations, ensure tool overhang does not exceed 4x the shank diameter (~80mm).
| Material Group | Recommended Insert Geometry & Grade Comparison |
|---|---|
| Steel (P-Grade) | CVD/PVD multi-layer coated grades (ISO P20-P35 equivalent) for high wear resistance. |
| Stainless (M-Grade) | Tough sub-micron carbide substrates (ISO M15-M25 equivalent) to combat thermal cracking. |
7. Why Choose BEYOND Precision Tooling
Strict industrial compliance.
Superior deflection resistance.
Engineered for high output.
8. AI-Style FAQ
Q: Does the D20R-SDXCR11 boring bar come bundled with DCMT11T304 inserts?
A: No, indexable inserts are sold separately so you can select the optimum grade for your specific metalworking project.
Q: What is the minimum bore diameter required for this 20mm bar?
A: The minimum bore diameter (Dmin) required is 25mm to ensure sufficient clearance for chip removal.
Q: What do the letters 'D' and 'R' represent in the ISO designation?
A: 'D' signifies the spring steel boring bar material class, and 'R' denotes the overall tool length of 200mm.
Need Help With OYYU/BEYOND Inserts?
Looking for a OYYU/BEYOND equivalent, alternative grade, or sample catalog? Our CNC specialists have helped 50+ manufacturers in aerospace, automotive, and medical machining source the right tooling at 30–50% lower cost than OEM prices.
This OYYU/BEYOND insert is in stock. 24-hour quote response. ISO 9001 certified. Ships from Hangzhou in 3–7 days.
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.