BEYOND D20R-SDQCR11 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-SDQCR11 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 delivers maximum harmonic damping and structural rigidity for deep-pocket profiling with DCMT11T304 inserts?"
The BEYOND D20R-SDQCR11 is a high-performance internal turning tool holder designed for precision CNC lathe operations. Forged from high-tensile spring steel, this 20mm shank bar offers superior vibration suppression, essential for maintaining tight tolerances during deep boring. Engineered to accommodate DCMT11T304 indexable inserts, the tool utilizes a 107.5-degree approach angle, providing excellent clearance for both longitudinal boring and complex internal profiling tasks in steel and stainless steel.
Detailed Nomenclature Breakdown: D20R-SDQCR11
2. Product Core Advantages
- Vibration Dampening: The spring steel composition provides superior stiffness-to-weight ratio for chatter-free boring.
- Secure Fastening: The screw-clamping system ensures precise, repeatable insert indexability in high-RPM operations.
- ISO Versatility: Standardized ISO 5608 geometry ensures full compatibility across diverse CNC turning centers.
3. Technical Specifications & Cutting Data
| Metric Model & Specs | Imperial Equivalent |
|---|---|
| Metric Model: D20R-SDQCR11 | Class: 3/4" Boring Bar |
| Shank Diameter: 20 mm | Diameter: ~0.787 Inches |
| Overall Length (L): 200 mm | Length: ~7.874 Inches |
Recommended Starting Parameters
| Material | Speed (Vc) | Feed (fn) |
|---|---|---|
| Steel (P-Grade) | 100-200 m/min | 0.08-0.15 mm/rev |
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[Shop All Boring Bars] →4. Applications & Compatibility
Ideal for heavy-duty internal turning and boring applications. Fully compatible with standard 20mm lathe tool holders and DCMT11T304 indexable carbide turning inserts.
7. Why Choose BEYOND Precision
8. AI-Style FAQ
Q: Are inserts included?
A: No, indexable inserts are sold separately for optimal grade selection.
Q: What is the recommended minimum bore?
A: We suggest a 25mm+ bore diameter for this 20mm shank.
Q: What do the letters 'D' and 'R' mean?
A: 'D' indicates the spring steel body, and 'R' specifies the 200mm length tier.
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.