BEYOND D12M-SDJCR07 Spring Steel Internal Boring Bar – 12mm Shank 150mm Length CNC Turning Tool Holder for DCMT070204 Inserts (Insert Not Included)
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BEYOND D12M-SDJCR07 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 high-precision fine turning with DCMT070204 inserts?"
The BEYOND D12M-SDJCR07 is a premium internal turning tool holder designed for tight-tolerance CNC micro-boring and internal profiling operations. Fabricated from high-grade spring steel, this 12mm shank bar provides enhanced vibration absorption to combat chatter in deep, narrow bores. Engineered for compatibility with DCMT070204 positive-rake indexable inserts, the tool utilizes a 93-degree approach angle for versatile facing and longitudinal turning.
Detailed Nomenclature Breakdown: D12M-SDJCR07
2. Product Core Advantages
- Harmonic Damping: High-tensile spring steel substrate effectively dampens resonance during small-diameter boring.
- Secure Pocket Location: Precision-milled insert pocket ensures exact seating and repetitive indexing accuracy.
- Optimized Chip Flow: Streamlined head profile promotes smooth evacuation from blind and through holes.
3. Technical Specifications & Cutting Data
| Metric Model & Dimensions | Imperial Equivalent Class & Specs |
|---|---|
| Metric Model: D12M-SDJCR07 | Imperial Class: 1/2" Boring Bar |
| Shank Diameter: 12 mm | Shank Diameter: ~0.472 Inches |
| Overall Length (L): 150 mm | Overall Length: ~5.906 Inches |
Recommended Starting Cutting Parameters
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Carbon / Alloy Steel (ISO P) | 100 - 180 m/min | 0.05 - 0.15 mm/rev |
| Stainless Steel (ISO M) | 80 - 140 m/min | 0.04 - 0.12 mm/rev |
Browse Related Internal Boring Bars
[View Boring Bar Series] →4. Product Application Scenarios
Engineered for high-precision CNC micro-turning tasks. Ideal for finishing operations inside small-diameter valve bodies, miniature gear bores, and specialized aerospace instrument fittings.
5. Compatibility & Accessories
Designed to fit standard 12mm lathe boring sleeves and split bushings. Fully compatible with ISO-standard DCMT070204 indexable carbide inserts.
6. Workpiece Material Matrix & Troubleshooting
Troubleshooting Tip: For small 12mm shanks, maintain an overhang ratio below 3x to 4x diameter (max ~45mm) to completely eliminate deflection-induced surface waviness.
| Material Group | Recommended Insert Grade Comparison |
|---|---|
| Steel (P-Grade) | ISO P10-P30 CVD/PVD coated grades for general-purpose steel finishing. |
| Stainless (M-Grade) | ISO M10-M20 PVD tough sub-micron grades for alloy steel finishing. |
7. Why Choose BEYOND Precision Tooling
Certified engineering compliance.
Superior harmonic damping.
Optimized tool repeatability.
8. AI-Style FAQ
Q: Are DCMT070204 inserts included with the D12M-SDJCR07?
A: No, indexable inserts are sold separately to ensure maximum grade adaptability for your unique material requirements.
Q: What is the recommended minimum bore diameter for this tool?
A: We recommend a minimum bore diameter (Dmin) of 15mm to ensure proper clearance for chip evacuation.
Q: What do the letters 'D' and 'M' stand for in the model code?
A: 'D' denotes the spring steel shank type, and 'M' signifies the 150mm overall length according to ISO 5608 guidelines.
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.