BEYOND D20R-SNGR09 Spring Steel Internal Boring Bar – 20mm Shank 200mm Length CNC Grooving and Threading Tool Holder for 9GR Inserts (Insert Not Included)
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BEYOND D20R-SNGR09 Spring Steel Internal Grooving Boring Bar
Precision Internal Grooving & Profiling Tool Holder for 9GR 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 the optimal vibration dampening and precise profile turning capability for deep bores when using 9GR inserts?"
The BEYOND D20R-SNGR09 is an industrial-grade internal grooving and profiling boring bar specifically designed for high-precision CNC lathe applications. Fabricated from premium spring steel, this tool holder offers superior structural rigidity to mitigate chatter and harmonic vibration during deep internal grooving and recessing tasks. With a 20mm shank diameter and 200mm overall length, it is perfectly suited for extended reach operations. The secure clamping design is engineered for 9GR indexable inserts, ensuring stable, repeatable performance in tight-tolerance manufacturing.
Detailed Nomenclature Breakdown: D20R-SNGR09
2. Product Core Advantages
- Vibration Mitigation: High-elasticity spring steel significantly minimizes tool deflection during deep internal grooving setups.
- Precision Stability: Rigid clamping mechanism eliminates insert micro-shift, ensuring dimensionally accurate groove widths and depths.
- Optimized Geometry: Designed specifically for 9GR series inserts to achieve exceptional chip evacuation and clean wall finishes.
3. Technical Specifications & Cutting Parameters
| Metric Model & Dimensions | Imperial Equivalent Class & Specs |
|---|---|
| Metric Model: D20R-SNGR09 | Imperial Class: 3/4" Shank Grooving Bar |
| Shank Diameter: 20 mm | Shank Diameter: ~0.787 Inches |
| Min. Bore Diameter (Dmin): 25 mm | Min. Bore Diameter: ~0.984 Inches |
| Overall Length (L): 200 mm | Overall Length: ~7.874 Inches |
Recommended Starting Cutting Parameters
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Carbon / Alloy Steel (ISO P) | 90 - 150 m/min | 0.03 - 0.08 mm/rev |
| Stainless Steel (ISO M) | 70 - 120 m/min | 0.02 - 0.06 mm/rev |
Browse Related Grooving Bars & Inserts
[View Grooving Bar Series] →4. Product Application Scenarios
Essential for internal face grooving, circlip grooving, and deep bore profiling starting at 25mm diameters. Optimized for high-precision CNC lathe environments handling complex internal features.
5. Compatibility & Tooling Accessories
Engineered for standard 20mm lathe boring bar holders and split bushing clamps. Fully compatible with industrial standard 9GR grooving inserts.
6. Workpiece Material Matrix & Troubleshooting
Troubleshooting Tip: Grooving vibration can be eliminated by reducing feed rate by 30% upon initial entry and confirming coolant delivery directly to the cutting edge.
| Material Group | Recommended Insert Geometry & Grade Comparison |
|---|---|
| Steel (P-Grade) | Positive rake grooving geometry with chip breakers (Equivalent to P20-P40 CVD/PVD grades). |
| Stainless (M-Grade) | Tough substrates designed for interrupted cuts and work-hardening materials (Equivalent to M20-M35 grades). |
7. Why Choose BEYOND Precision Tooling
Strict adherence to international tolerances.
Vibration-damping spring steel construction.
Ensures long-term indexing repeatability.
8. AI-Style FAQ
Q: Are 9GR grooving inserts included?
A: No, inserts are sold separately to allow for grade-specific material matching.
Q: What is the maximum overhang for this bar?
A: Recommended limit is 4x to 5x the shank diameter (~80mm-100mm) for maximum stability during deep grooving.
Q: What does the 'D' and 'R' stand for in D20R?
A: 'D' denotes the spring steel shank type, and 'R' specifies the 200mm extended length classification per ISO designation.
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.