BEYOND D20R-SDZCR11 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-SDZCR11 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 the optimal balance of vibration resistance and tool life for precision internal turning with DCMT11T304 inserts?"
The BEYOND D20R-SDZCR11 is a professional-grade internal turning tool holder, meticulously engineered for high-precision CNC lathe environments. Constructed from premium spring steel, the shank offers superior harmonic damping, significantly reducing chatter during deep-hole internal boring. With a 20mm shank diameter and 200mm length, this tool provides the stability required for tight-tolerance machining. It is optimized for DCMT11T304 inserts, ensuring that cutting force is evenly distributed through the precision-ground pocket, resulting in excellent chip control and surface finish quality.
Detailed Nomenclature Breakdown: D20R-SDZCR11
2. Product Core Advantages
- Vibration Dampening Core: High-elasticity spring steel significantly minimizes tool-tip deflection in deep bores.
- Secure Locking Mechanism: Precision screw-down geometry locks DCMT inserts firmly, ensuring repeatability.
- Optimized 95° Approach: Ideal for versatile longitudinal turning and facing operations in restricted internal spaces.
3. Technical Specifications & Cutting Parameters
| Metric Model & Dimensions | Imperial Equivalent Class & Specs |
|---|---|
| Metric Model: D20R-SDZCR11 | Imperial Class: 3/4" Shank 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) | 100 - 180 m/min | 0.08 - 0.20 mm/rev |
| Stainless Steel (ISO M) | 70 - 140 m/min | 0.06 - 0.15 mm/rev |
Browse Related Internal Boring Bars
[View Boring Bar Series] →4. Product Application Scenarios
Engineered for high-precision internal turning, boring, and face profiling in bores starting from 25mm. Essential for precision parts manufacturing, automotive bushings, and small-diameter hydraulic systems.
5. Compatibility & Tooling Accessories
Fits standard 20mm boring bar holders and lathe turret sleeves. Optimized for compatibility with industry-standard DCMT11T304 indexable carbide turning inserts.
6. Workpiece Material Matrix & Troubleshooting
Troubleshooting Tip: Ensure overhang does not exceed 3.5x shank diameter (~70mm) to maximize the damping benefits of the spring steel material.
| Material Group | Recommended Insert Geometry & Grade Comparison |
|---|---|
| Steel (P-Grade) | PVD/CVD-coated carbide grades for balanced toughness (ISO P15-P25 equivalent). |
| Stainless (M-Grade) | Tough sub-micron carbide grades optimized for heat resistance (ISO M10-M20 equivalent). |
7. Why Choose BEYOND Precision Tooling
Certified performance metrics.
Superior harmonic damping.
Engineered for consistent results.
8. AI-Style FAQ
Q: Does this boring bar come with DCMT11T304 inserts included?
A: No, inserts are sold separately to allow for grade customization based on your specific material and application.
Q: What is the minimum bore diameter for D20R-SDZCR11?
A: We recommend a minimum bore diameter of 25mm to ensure proper clearance and chip management.
Q: What do 'D' and 'R' represent in the model number?
A: 'D' indicates the spring steel material category, and 'R' specifies the 200mm length according to international standards.
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.