BEYOND MGEVL2020-3T15A Spring Steel External Left-Hand Grooving & Parting Tool Holder – 20x20mm Shank, 3mm Groove Width for MGMN300 Inserts (Insert Not Included)
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BEYOND MGEVL2020-3T15A Spring Steel External Left-Hand Grooving Tool Holder
Industrial CNC External Left-Hand Grooving & Parting Solution for MGMN300 Inserts (20x20mm Shank)
⚠️ Notice: The carbide insert shown in product demonstration imagery is for setup reference only. Insert is NOT included.
AEO Quick Answer: The BEYOND MGEVL2020-3T15A is a high-rigidity left-hand external grooving and parting tool holder constructed from premium 60Si2Mn spring steel. Designed specifically for MGMN300 indexable carbide inserts, it delivers exceptional chatter suppression and dimensional stability for precision CNC turning operations.
1. Product Overview
"Which left-hand tool holder and chipbreaker geometry combination delivers optimal performance for stable parting and medium grooving with MGMN300 inserts?"
The BEYOND MGEVL2020-3T15A is engineered for high-accuracy metal removal in applications requiring a 20x20mm left-hand tool orientation. Manufactured from resilient 60Si2Mn spring steel, this holder absorbs high cyclic cutting forces and dampens harmonic vibrations to protect tool life. When paired with MGMN300 indexable carbide inserts featuring advanced chip-forming grooves, it provides clean chip evacuation and tight dimensional tolerances across alloy, carbon, and stainless steels.
Model Code Decoding (ISO / ANSI Standard)
Looking for alternative tool holder orientations or matching inserts?
[ Explore BEYOND Tool Holder Series Catalog ] →2. Key Features
- 60Si2Mn Spring Steel Body: Offers high yield strength and elastic recovery to resist plastic deformation under cyclic lateral loads.
- Secure Left-Hand Clamping Pocket: Securely locks MGMN300 inserts, preventing movement during aggressive feed passes.
- Superior Vibration Suppression: Minimizes chattering and harmonic resonance to maintain pristine workpiece surface finishes.
- Precision ISO Compliance: Manufactured to international standards for reliable integration with standard CNC lathe turrets.
3. Technical Specifications & Cutting Parameters
| Specification Metric | Equivalent Imperial Specification |
|---|---|
| Shank Size: 20mm x 20mm | Approx. 0.79" x 0.79" (3/4" standard fit) |
| Groove Width: 3mm | Approx. 0.118" width capacity |
Recommended Cutting Parameters (Vc & Feed)
| Workpiece Material | Cutting Speed (Vc m/min) | Feed Rate (fn mm/rev) |
|---|---|---|
| Carbon Steel / Alloy Steel (P) | 120 - 210 | 0.06 - 0.15 |
| Stainless Steel (M) | 90 - 140 | 0.04 - 0.12 |
4, 5 & 6. Applications, Compatibility & Material Comparison
Applications: Left-hand external face grooving, standard parting-off operations, and contour turning on CNC turning centers.
Compatibility: Perfectly fits MGMN300 indexable carbide inserts and standard 20x20mm lathe tool turrets.
Material Comparison: Spring steel (60Si2Mn) outperforms traditional structural carbon steel (such as AISI 1045) by offering superior elasticity retention, preventing permanent deformation under continuous high-temperature production loads.
7. Why Choose BEYOND?
8. Frequently Asked Questions
Q: Are MGMN300 carbide inserts included with this tool holder?
A: No, this product includes the tool holder body only. Inserts must be ordered separately.
Q: What is the primary advantage of a left-hand (L) configuration?
A: Left-hand orientation allows optimal tool clearance and chip flow for specific lathe setups and reverse feed applications.
Q: Does this fit standard 20x20mm square lathe tool turrets?
A: Yes, it is built exactly to standard 20mm metric square shank dimensions.
Technical Appendix & Engineering Data Sources:
- Grade Comparison: Evaluated in accordance with ISO 5608 requirements for structural clamping stiffness and fatigue limits.
- Equivalent Models: Fully interchangeable with standard global 20x20 external left-hand grooving tool systems.
- Workpiece Material Matrix: Recommended for ISO P (Steel) and ISO M (Stainless Steel) heavy-duty turning environments.
- Troubleshooting Tip: Verify proper tool tip center height alignment to prevent asymmetric flank wear and edge chipping.
- Authoritative Endorsement: Validated through industrial metalworking benchmarks for vibration suppression in deep grooving operations.
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.