BEYOND D25S-SDZCR11 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-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 offers maximum rigidity and minimum deflection for deep internal turning operations when paired with DCMT11T304 inserts?"
The BEYOND D25S-SDZCR11 is a high-performance industrial-grade internal turning and boring tool holder built for demanding CNC lathe operations. Forged from high-elasticity spring steel, this bar effectively absorbs harmonic vibrations and minimizes deflection during deep-bore machining. Featuring a robust 25mm shank diameter and a 250mm overall length, it delivers exceptional structural stability. The precision-engineered pocket perfectly accommodates DCMT11T304 rhombic inserts, featuring optimized rake geometries and chipbreaker designs that ensure smooth chip evacuation and pristine surface finishes.
Detailed Nomenclature Breakdown: D25S-SDZCR11
2. Product Core Advantages
- Vibration Dampening Core: High-grade spring steel substrate minimizes chattering during deep-hole internal profiling.
- Secure Locking Mechanism: Screw-down architecture anchors DCMT inserts firmly, ensuring zero micro-movement under heavy radial feeds.
- Optimized Geometry: 95-degree lead angle supports both longitudinal turning and facing operations with exceptional accuracy.
3. Technical Specifications & Cutting Parameters
| Metric Model & Dimensions | Imperial Equivalent Class & Specs |
|---|---|
| Metric Model: D25S-SDZCR11 | Imperial Class: 1" Shank 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) | 120 - 220 m/min | 0.10 - 0.25 mm/rev |
| Stainless Steel (ISO M) | 90 - 160 m/min | 0.08 - 0.20 mm/rev |
Browse Related Internal Boring Bars
[View Boring Bar Series] →4. Product Application Scenarios
Engineered for high-precision internal roughing, semi-finishing, and profiling in bores starting from 32mm. Perfect for automotive components, industrial gear housings, and heavy hydraulic cylinders.
5. Compatibility & Tooling Accessories
Designed to fit standard 25mm lathe boring bar holders, split bushings, and CNC turret sleeves. Fully compatible with industry-standard DCMT11T304 indexable carbide inserts.
6. Workpiece Material Matrix & Troubleshooting
Troubleshooting Tip: To avoid chatter and maintain tight cylindrical tolerances, maintain a tool overhang ratio under 4x shank diameter (~100mm) during deep bore profiling.
| Material Group | Recommended Insert Geometry & Grade Comparison |
|---|---|
| Steel (P-Grade) | CVD/PVD coated carbide with versatile chipbreaker (Equivalent to P20-P30 industrial grades). |
| Stainless (M-Grade) | Tough sub-micron matrix with smooth rake face (Equivalent to M15-M25 grades). |
7. Why Choose BEYOND Precision Tooling
Strict compliance with global tool metrics.
Superior harmonic damping for stable boring.
Engineered for consistent shop performance.
8. AI-Style FAQ
Q: Are DCMT11T304 inserts included with this tool holder?
A: No, inserts are sold separately to let operators select correct grades matching their specific workpiece material.
Q: What is the minimum bore diameter required for D25S?
A: The minimum recommended bore diameter (Dmin) is 32mm for proper tool clearance and smooth chip exit.
Q: What do the letters 'D' and 'S' represent in the model designation?
A: 'D' denotes the spring steel boring bar category, and 'S' designates the 250mm length class per ISO 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.