Mitsubishi SNMG190612 UC5115 Turning Insert | Cast Iron Heavy Turning
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SNMG190612 UC5115
Mitsubishi Materials | Heavy-Duty Cast Iron Machining Specialist
The Mitsubishi SNMG190612 UC5115 is a powerhouse indexable turning insert specifically designed for large-scale cast iron turning. Built on a robust 19mm substrate, this insert is the go-to solution for heavy-duty roughing and interrupted cutting. The UC5115 CVD grade provides an industry-leading balance of toughness and wear resistance, making it highly effective for machining Gray Cast Iron (FC) and Ductile Cast Iron (FCD) in high-torque CNC applications.
Condition: 100% Genuine Mitsubishi | Box of 10
ISO Designation Decoded
Square 90°
0° Relief
M-Class Tol.
Double Sided
19.05mm Size
6.35mm Thick
1.2mm Radius
Technical Specifications
| Specification | Metric Designation | Inch (ANSI) Equivalent |
|---|---|---|
| Model Name | SNMG190612 | SNMG 643 |
| Inscribed Circle ($IC$) | 19.05 mm | 0.750" (3/4") |
| Thickness ($S$) | 6.35 mm | 0.250" (1/4") |
| Corner Radius ($RE$) | 1.2 mm | 0.047" (3/64") |
UC5115 Grade Advantage
The UC5115 grade features Mitsubishi's "All-Black Super-Even Coat" (CVD TiCN + Al2O3). This thick, fibrous coating provides a superior thermal barrier, protecting the substrate from the high heat generated during high-speed cast iron turning. It is particularly effective at preventing flank wear and thermal cracking, even during unstable cutting conditions.
Medium to Heavy Geometry
With its large 19mm size, this SNMG geometry is designed for high metal removal rates (MRR). The 1.2mm radius offers high cutting edge strength, making it the perfect choice for roughing large castings. The integrated chipbreaker provides stable chip control across a wide range of feed rates, preventing chip re-cutting on the workpiece surface.
Recommended Cutting Parameters
Starting Values for Cast Iron (UC5115)
| Material Group | Cutting Speed ($v_c$) | Feed Rate ($f$) | Depth of Cut ($a_p$) |
|---|---|---|---|
| Gray Cast Iron (FC) | 150 - 350 m/min | 0.30 - 0.70 mm/rev | 2.0 - 6.0 mm |
| Ductile Cast Iron (FCD) | 120 - 280 m/min | 0.25 - 0.60 mm/rev | 2.0 - 5.0 mm |
MAXIMIZE TOOL RIGIDITY
Optimized for use with heavy-duty PSSNR/L or MSKNR/L 90° turning tool holders with 19mm pockets.
Find 19mm Tool Holders →
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This Mitsubishi insert is in stock. 24-hour quote response. ISO 9001 certified. Ships from Hangzhou in 3–7 days.
Technical FAQ & Buying Guide
When choosing CNC cutting tools, check the full model code, dimensions, grade and selected variant before ordering. Do not rely on the product image alone.
For carbide inserts, tool holders, drills and end mills, compare the mounting dimensions, connection type and manufacturer's specifications with your holder or machine. If you are unsure, share your existing part number and machining application with us before ordering.
Check the product listing for the selling unit, pack quantity and included components. If it is unclear whether the price is per piece or per pack, or whether a tool body and inserts are sold separately, contact us before purchasing.
Select cutting speed, feed rate and depth of cut using the relevant manufacturer's recommendations for your tool model, workpiece material, machine conditions and coolant method. The same settings are not suitable for every product or application.
Our automatic quantity discount is 6% off for 2–9 items and 12% off for 10 or more items, based on the total product quantity in the cart. Other offers may not combine with this discount; check the applicable offer conditions.
According to our shipping policy, orders are typically processed and shipped within 1–3 business days after confirmation. Delivery generally takes 5–20 business days, depending on your destination and shipping method. Customs clearance or unforeseen delays may affect delivery times. A tracking number is sent by email after shipment.