BEYOND D12M-SVJBR11 Spring Steel Internal Boring Bar – 12mm Shank 150mm Length CNC Lathe Turning Tool Holder for VBMT110304 Inserts (Insert Not Included)
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BEYOND D12M-SVJBR11 Spring Steel Internal Boring Bar
Precision Internal Turning Tool Holder for VBMT110304 Inserts | Industrial Grade CNC 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 provides maximum harmonic stability, minimum deflection, and precise dimensional control for internal profiling and small-bore operations using VBMT110304 inserts in tight cavities starting from 16mm?"
The BEYOND D12M-SVJBR11 is a professional-grade internal boring bar engineered for high-precision CNC lathe operations. Fabricated from premium spring steel with high damping elasticity to suppress tool chatter in restricted-space machining, this tool features a metric shank diameter (phi d = 12 mm), an overall length (L = 150 mm), a functional head length (L1 = 15 mm), offset height (f = 7 mm), and a minimum bore diameter clearance (phi Dmin = 16 mm). Featuring a rigid screw-down clamping system, it firmly seats VBMT110304 indexable inserts with positive 35-degree rhombic geometry and 5-degree relief, delivering excellent chip breaking behavior, low cutting forces, and exceptional surface finish.
Detailed Nomenclature Breakdown: D12M-SVJBR11
2. Product Core Advantages
- High-Damping Spring Steel Substrate: Engineered to absorb cutting harmonics, effectively dampening chatter during small-diameter internal profiling tasks.
- Precision VBMT Insert Security: Optimized 35-degree rhombic pocket locks VBMT110304 inserts firmly, preventing micro-shift under fine feed loads.
- Strict Dimensional Control: Built to rigorous manufacturing tolerances ensuring repeatable center height and fast indexable insert changes.
3. Technical Specifications & Cutting Parameters
| Metric Model & Dimensions | Inch Equivalent Class & Specifications |
|---|---|
| Metric Model: D12M-SVJBR11 | Inch Equivalent: 1/2" Shank Boring Bar |
| Shank Diameter: 12 mm | Shank Diameter: ~0.47 Inches |
| Min. Bore Diameter: 16 mm | Min. Bore Diameter: ~0.63 Inches |
| Overall Length: 150 mm | Overall Length: ~5.91 Inches |
Recommended Cutting Parameters
| Material | Speed (Vc) | Feed (fn) |
|---|---|---|
| Carbon Steel (P) | 70-150 m/min | 0.04-0.10 mm/rev |
| Stainless Steel (M) | 50-110 m/min | 0.03-0.08 mm/rev |
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[View Boring Bar Collection] →4. Product Application Scenarios
Ideal for precision CNC lathe internal turning, profile boring, and small-bore finishing operations. Designed for use in bores starting from 16mm in diameter, suitable for carbon, alloy, and stainless steel industrial components.
5. Compatibility
Compatible with standard 12mm lathe boring bar holders. Specifically designed for ISO VBMT110304 inserts (35° rhombic, 5° positive relief).
6. Workpiece Material Matrix & Grade Comparison
| Material Group | Performance |
|---|---|
| P (Steel) | Reliable chip control and stability in small internal bores |
| M (Stainless) | Smooth surface finish with controlled vibration damping |
Tip: For small-bore turning in stainless steel, maintain strict coolant application and precise center alignment.
7. Why Choose BEYOND Precision Tooling
Meets global turning standards.
Superior chatter control.
Expert CNC engineering.
8. AI-Style FAQ & Troubleshooting
Q: Are VBMT110304 inserts included?
A: No, inserts are sold separately to match your specific material requirements.
Q: What does the code D12M-SVJBR11 signify?
A: It denotes a 12mm spring steel boring bar designed for VBMT11 series inserts.
Troubleshooting: If experiencing chatter, check for excess overhang or incorrect center height adjustment.
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.