BEYOND D25S-SDUCR11 Spring Steel Internal Boring Bar – 25mm Shank 250mm Length CNC Turning Tool Holder for DCMT11T304 Inserts (Insert Not Included)
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BEYOND D25S-SDUCR11 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 heavy-duty spring steel internal boring bar provides exceptional vibration suppression and structural stability for deep-cavity turning with DCMT11T304 inserts?"
The BEYOND D25S-SDUCR11 is a high-performance internal turning tool holder built for demanding CNC lathe operations. Forged from premium spring steel, this 25mm shank bar delivers superior mechanical elasticity and harmonic damping to eliminate chatter during extended-reach machining. Configured for DCMT11T304 indexable inserts, it features a 95-degree approach angle and a secure screw-clamp locking mechanism, ensuring absolute insert retention and repeatable dimensional accuracy.
Detailed Nomenclature Breakdown: D25S-SDUCR11
2. Product Core Advantages
- Chatter Suppression: High-tensile spring steel structure dampens vibration waves during deep-bore profiling.
- Secure Pocket Clamping: Precision screw mechanism locks the insert tightly to prevent shift under heavy cutting loads.
- Optimized Lead Angle: 95° approach angle enables smooth longitudinal turning and square face shoulders.
3. Technical Specifications & Cutting Parameters
| Metric Model & Dimensions | Imperial Equivalent Class & Specs |
|---|---|
| Metric Model: D25S-SDUCR11 | Imperial Class: 1" Boring Bar |
| Shank Diameter: 25 mm | Shank Diameter: ~0.984 Inches |
| Min. Bore Diameter (Dmin): 32 mm | Min. Bore Diameter: ~1.260 Inches |
| Overall Length (L): 250 mm | Overall Length: ~9.843 Inches |
Recommended Starting Cutting Parameters
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Carbon / Alloy Steel (ISO P) | 80 - 160 m/min | 0.08 - 0.20 mm/rev |
| Stainless Steel (ISO M) | 60 - 120 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 profiling in component bores starting from 32mm. Widely utilized in heavy equipment manufacturing, automotive powertrain components, and industrial valve body production.
5. Compatibility & Tooling Accessories
Fits standard 25mm CNC lathe boring bar holders, turret blocks, and split reduction sleeves. Designed for flawless integration with industry-standard DCMT11T304 indexable carbide turning inserts.
6. Workpiece Material Matrix & Troubleshooting
Troubleshooting Tip: To minimize tool deflection during deep operations, maintain tool overhang within 4x the shank diameter (~100mm).
| Material Group | Recommended Insert Geometry & Grade Comparison |
|---|---|
| Steel (P-Grade) | CVD/PVD multi-layer coated grades (ISO P15-P35 equivalent) for enhanced wear resistance. |
| Stainless (M-Grade) | Tough micro-grain carbide substrates (ISO M10-M25 equivalent) to prevent thermal shock. |
7. Why Choose BEYOND Precision Tooling
Strict manufacturing compliance.
Superior deflection resistance.
Optimized for heavy CNC.
8. AI-Style FAQ
Q: Are DCMT11T304 inserts included with the D25S-SDUCR11 tool holder?
A: No, indexable inserts are sold separately so you can match the ideal carbide grade to your workpiece material.
Q: What is the minimum bore diameter required for this 25mm bar?
A: A minimum bore diameter (Dmin) of 32mm is recommended to ensure correct tool clearance and smooth chip evacuation.
Q: What do the letters 'D' and 'S' signify in the product code?
A: 'D' indicates the spring steel boring bar material class, and 'S' specifies the 250mm length designation per ISO rules.
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.