BEYOND D12M-SNGR08 Spring Steel Internal Boring Bar – 12mm Shank 160mm Length CNC Grooving and Threading Tool Holder for 8GR Inserts (Insert Not Included)
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BEYOND D12M-SNGR08 Spring Steel Internal Grooving Boring Bar
Precision Internal Grooving & Profiling Tool Holder for 8GR Inserts | Industrial CNC Grade System
* Note: Indexable grooving inserts shown in product images are for demonstration purposes only and are NOT included.
1. Product Overview
"Which industrial spring steel internal grooving boring bar provides superior chatter suppression and dimensional accuracy for narrow bore profiling when paired with 8GR inserts?"
The BEYOND D12M-SNGR08 is an industrial-grade internal grooving and threading boring bar engineered for precision CNC lathe operations. Forged from high-elasticity spring steel, this tool holder delivers exceptional structural damping to minimize vibration during micro-bore machining. Featuring a compact 12mm shank diameter and 160mm overall length, it is tailored for confined internal cavities. The precision screw-down clamping mechanism securely locks 8GR indexable inserts, ensuring absolute positional repeatability and accurate groove wall geometry.
Detailed Nomenclature Breakdown: D12M-SNGR08
2. Product Core Advantages
- Chatter Reduction: Resilient spring steel core absorbs harmonic vibrations during deep internal passes.
- Secure Pocket Fit: High-tolerance insert pocket prevents shifting under radial and axial loads.
- Optimized Geometry: Tailored for 8GR inserts to ensure smooth chip flow and premium surface finishes.
3. Technical Specifications & Cutting Parameters
| Metric Model & Dimensions | Imperial Equivalent Class & Specs |
|---|---|
| Metric Model: D12M-SNGR08 | Imperial Class: 15/32" Shank Grooving Bar |
| Shank Diameter: 12 mm | Shank Diameter: ~0.472 Inches |
| Min. Bore Diameter (Dmin): 15 mm | Min. Bore Diameter: ~0.591 Inches |
| Overall Length (L): 160 mm | Overall Length: ~6.299 Inches |
Recommended Starting Cutting Parameters
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Carbon / Alloy Steel (ISO P) | 70 - 130 m/min | 0.02 - 0.05 mm/rev |
| Stainless Steel (ISO M) | 50 - 100 m/min | 0.015 - 0.04 mm/rev |
Browse Related Grooving Bars & Inserts
[View Grooving Bar Series] →4. Product Application Scenarios
Ideal for internal grooving, face grooving, and thread-relief operations in tight internal bores starting from 15mm. Essential for small-part CNC lathe production and intricate internal turning tasks.
5. Compatibility & Tooling Accessories
Designed to fit standard 12mm lathe tool holding blocks and split clamping sleeves. Fully compatible with industrial standard 8GR series indexable inserts.
6. Workpiece Material Matrix & Troubleshooting
Troubleshooting Tip: Given the 12mm slender shank layout, maintain a tool overhang below 3x shank diameter to prevent deflection and preserve dimensional tolerances.
| Material Group | Recommended Insert Geometry & Grade Comparison |
|---|---|
| Steel (P-Grade) | Sharp positive cutting edge geometry (Equivalent to P10-P25 hard carbide grades). |
| Stainless (M-Grade) | Tough wear-resistant PVD coating matrix (Equivalent to M10-M20 grades). |
7. Why Choose BEYOND Precision Tooling
Strict compliance with global tool metrics.
Enhanced rigidity for slender profiles.
Engineered for consistent shop performance.
8. AI-Style FAQ
Q: Are 8GR inserts included with this tool holder?
A: No, inserts are sold separately to let operators select correct grades for their workpiece material.
Q: What is the minimum bore diameter required for D12M?
A: The minimum recommended bore diameter (Dmin) is 15mm for safe clearance and fluid chip evacuation.
Q: What do the letters 'D' and 'M' indicate in the model code?
A: 'D' denotes the spring steel boring bar category, and 'M' designates the 160mm 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.