Mitsubishi MLG2040L UTI20T Grooving Insert | MMC Japan
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MLG2040L UTI20T
Mitsubishi Materials | Precision 4.0mm External Grooving Insert
The Mitsubishi MLG2040L UTI20T is a wide-profile indexable grooving insert designed for heavy-duty precision turning and small-part machining. Engineered specifically for the SMG series tool holders, this 4.0mm insert provides a stable, wide-groove solution with exceptional repeatability. Utilizing the UTI20T uncoated carbide grade, it delivers the sharpest possible cutting edge, making it the premier choice for machining aluminum alloys, copper, brass, and cast iron where thermal conductivity and anti-adhesion are critical.
Technical Specifications
| ISO Designation (Metric) | MLG2040L |
|---|---|
| Groove Width (CW) | 4.0 mm (.1575") |
| Hand of Tool | Left Hand (L) |
| Cutting Grade | UTI20T (Uncoated K-Type Carbide) |
UTI20T Carbide Performance
The UTI20T grade is an uncoated tungsten carbide optimized for non-ferrous material grooving. Its micro-grain structure facilitates an "up-sharp" edge that prevents built-up edge (BUE) in sticky materials. By avoiding PVD coatings, the tool maintains a tighter radius, essential for precision CNC grooving and high-quality surface finishes.
MLG Wide Geometry
The MLG geometry for 4.0mm widths is designed to handle increased chip loads. The rake angle is engineered for efficient chip breaking in wider grooves, preventing chip nesting which can mar the part surface. This insert is ideal for automatic lathe operations requiring wide undercuts or face grooving.
Recommended Cutting Parameters
| Workpiece Material | Cutting Speed ($v_c$) | Feed Rate ($f$) |
|---|---|---|
| Aluminum Alloys | 150 - 400 m/min | 0.05 - 0.25 mm/rev |
| Copper & Brass | 100 - 300 m/min | 0.05 - 0.20 mm/rev |
| Cast Iron (Gray/Ductile) | 60 - 150 m/min | 0.05 - 0.15 mm/rev |
HOLDER COMPATIBILITY
The MLG20 series insert is optimized for use with Mitsubishi SMG series external holders.
Shop SMG Series Holders →Metric vs. Inch Cross-Reference
| Dimension | ISO: MLG2040L | ANSI Equivalent |
|---|---|---|
| Groove Width | 4.0 mm | .157" (5/32" approx) |
| System Shank Fit | 20 mm Series | ~.787" Holder |
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.