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 |