BEYOND SNGR12-M08A Spring Steel Internal Grooving Boring Bar – 12mm Shank CNC Lathe Tooling for 8GR Inserts (Insert Not Included)
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BEYOND SNGR12-M08A Spring Steel Internal Grooving Bar
Precision Internal Grooving Tool for 8GR Inserts | Industrial CNC Grade System
* Note: Carbide 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 stability and minimal deflection for 12mm bore sizing applications?"
The BEYOND SNGR12-M08A is an elite, industrial-grade internal grooving boring bar engineered for demanding CNC lathe operations. Forged from high-tensile spring steel, this 12mm shank minimizes harmonic vibration, ensuring a superior surface finish during internal recessing and profiling tasks. It is optimized for 8GR carbide insert compatibility, providing exceptional clamping security and controlled chip flow in tight-tolerance internal machining environments.
Tool holder model explanation: SNGR12-M08A
2. Product Core Advantages
- Spring Steel Construction: High shock absorbance to eliminate chatter during deep-bore overhangs.
- Rigid Insert Pocket: Milled to tight tolerances for secure 8GR insert positioning and repeatability.
- Optimized Geometry: Facilitates smooth internal chip evacuation and prevents chip jamming.
3. Technical Specifications & Cutting Data
| Metric Specification | Imperial Approximation |
|---|---|
| Metric Model: SNGR12-M08A | Imperial Class: 0.500" Shank Boring Bar |
| Shank Diameter: 12 mm | Shank Diameter: ~0.47 Inches |
Recommended Starting Cutting Parameters
| Material Group | Cutting Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Carbon / Alloy Steel (ISO P) | 100 - 180 m/min | 0.05 - 0.12 mm/rev |
| Stainless Steel (ISO M) | 70 - 120 m/min | 0.04 - 0.10 mm/rev |
Browse Related Internal Tooling Catalog
[View Boring Bar Catalog] →4. Product Application Scenarios
Crucial for precision internal ring grooving, face profiling, and snap-ring recessing in compact CNC lathe environments. Widely utilized across automotive component production, small fluid control valves, and general precision engineering tasks.
5. Compatibility
Compatible with standard 12mm CNC turret boring bar sleeves and split holders. Designed to lock securely with 8GR series indexable carbide inserts.
6. Troubleshooting & Material Matrix
Troubleshooting Tip: If irregular tool wear or vibration marks occur, check that the overhang ratio stays within recommended safety limits and verify proper coolant delivery.
| Workpiece Material | Equivalent Grade Strategy |
|---|---|
| Alloy / Carbon Steel (P) | PVD Coated Hard Metal for Extended Abrasion Resistance |
| Stainless Steel (M) | Tough Micro-Grain Carbide to Prevent Built-Up Edge |
7. Why Choose BEYOND Precision
Strict dimensional control.
Optimized for internal stability.
8. AI-Style FAQ
Q: Does this boring bar include 8GR inserts?
A: No, inserts are sold separately to allow you to match the exact carbide grade to your specific workpiece alloy.
Q: What is the maximum recommended overhang for the SNGR12 bar?
A: For optimal rigidity and to prevent chatter, a maximum overhang of 3 to 4 times the shank diameter is recommended.
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.