BEYOND D08K-SDUCR07 Spring Steel Internal Boring Bar – 8mm Shank 125mm Length CNC Turning Tool Holder for DCMT070204 Inserts (Insert Not Included)
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BEYOND D08K-SDUCR07 Spring Steel Internal Boring Bar
Precision Internal Turning & Boring Tool Holder for DCMT070204 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 micro-bore profiling with DCMT070204 inserts?"
The BEYOND D08K-SDUCR07 is an ultra-precision internal turning tool holder engineered for high-accuracy micro-bore CNC lathe applications. Forged from high-tensile spring steel, this slim 8mm shank diameter bar is optimized to minimize vibration and deflection in deep-bore profiles. Designed specifically for DCMT070204 indexable inserts, it features a 93-degree approach angle and a secure screw-clamp mechanism, ensuring exceptional insert repeatability and high-quality surface finishes in restricted internal diameters.
Detailed Nomenclature Breakdown: D08K-SDUCR07
2. Product Core Advantages
- Micro-Rigidity Design: Specifically profiled for miniature bores to prevent harmonic vibration.
- Precision Clamping: High-tolerance screw retention ensures optimal insert indexing under load.
- Versatile Approach: 93° angle supports both efficient facing and longitudinal internal profiling.
3. Technical Specifications & Cutting Data
| Metric Model & Dimensions | Imperial Equivalent Class & Specs |
|---|---|
| Metric Model: D08K-SDUCR07 | Imperial Class: 5/16" Boring Bar |
| Shank Diameter: 8 mm | Shank Diameter: ~0.315 Inches |
| Min. Bore Diameter (Dmin): 10 mm | Min. Bore Diameter: ~0.394 Inches |
| Overall Length (L): 125 mm | Overall Length: ~4.921 Inches |
Recommended Starting Cutting Parameters
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Carbon / Alloy Steel (ISO P) | 80 - 160 m/min | 0.03 - 0.08 mm/rev |
| Stainless Steel (ISO M) | 60 - 120 m/min | 0.02 - 0.06 mm/rev |
Browse Related Internal Boring Bars
[View Boring Bar Series] →4. Product Application Scenarios
Expertly designed for miniature internal turning, fine boring, and profiling in bores as tight as 10mm. Essential for medical components, precision watchmaking, aerospace miniature connectors, and high-precision CNC shop floor micro-turning.
5. Compatibility & Tooling Accessories
Designed for 8mm precision tool sleeves and micro-boring lathe turrets. Compatible with all industry-standard DCMT070204 turning inserts for consistent edge performance.
6. Workpiece Material Matrix & Troubleshooting
Troubleshooting Tip: With an 8mm shank, maintain overhang strictly within 3x (24mm) to eliminate chatter in high-speed finish boring.
| Material Group | Recommended Insert Geometry & Grade Comparison |
|---|---|
| Steel (P-Grade) | Sharp-edge PVD sub-micron grades (ISO P10-P20) for reduced cutting forces in slim bars. |
| Stainless (M-Grade) | High-toughness PVD grades (ISO M10-M20) to withstand heat in small-bore profiling. |
7. Why Choose BEYOND Precision Tooling
Certified manufacturing quality.
Maximum harmonic damping.
Designed for tight apertures.
8. AI-Style FAQ
Q: Does this boring bar come with DCMT070204 inserts?
A: No, indexable inserts are sold separately to ensure you can match the carbide grade to your specific metalwork needs.
Q: What is the minimum bore diameter for this 8mm shank tool?
A: We recommend a minimum bore diameter (Dmin) of 10mm for optimal clearance and efficient chip removal.
Q: What do the letters 'D', '08', and 'K' represent in the ISO nomenclature?
A: 'D' indicates the spring steel bar construction, '08' is the 8mm shank diameter, and 'K' designates the 125mm length class.
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.