Mitsubishi CNMG120408-GH UE6020 Heavy Roughing Insert (10pcs)
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CNMG120408-GH UE6020
Heavy Roughing Titan | UE6020 Impact Toughness | GH Reinforced Geometry
The Powerhouse for Heavy Steel Removal
UE6020 Grade (The Fracture Resister): The UE6020 is a specialized CVD-coated grade engineered for P-Class (Steel) turning. It is legendary for its ability to handle "unfriendly" conditions. Whether you are dealing with vibration, interrupted cuts, or hard-skin hot-rolled steel, the UE6020's high-toughness substrate prevents edge chipping where other grades would fail.
GH Chipbreaker (Heavy-Duty Shield): The GH geometry is designed for the most aggressive depths of cut and high feed rates. It features a reinforced "T-Land" (Negative Land) on the cutting edge, which drastically increases edge strength. This is the optimal choice for roughing operations where tool pressure is high and chip control is mandatory.
0.8mm (1/32") Universal Radius: The 0.8mm radius provides a perfect balance. It is thick enough to withstand heavy radial forces during roughing while still capable of leaving a decent semi-finish surface for subsequent operations.
Metric vs. Imperial Comparison
| System | Model Designation | I.C. (Inscribed Circle) | Thickness | Radius (RE) |
|---|---|---|---|---|
| Metric | CNMG120408-GH | 12.7 mm | 4.76 mm | 0.80 mm |
| Imperial | CNMG432-GH | 1/2" | 3/16" | 0.0315" (1/32") |
Heavy Roughing Cutting Parameters
*The GH chipbreaker requires a minimum feed to engage chip control. Optimized for productivity over surface finish.
| Workpiece Material | Speed (Vc) | Feed (fn) | Depth (Ap) |
|---|---|---|---|
| Carbon Steel (1045/S45C) | 120 - 250 m/min | 0.25 - 0.55 mm/r | 1.50 - 5.00 mm |
| Alloy Steel (4140/SCM440) | 100 - 200 m/min | 0.20 - 0.45 mm/r | 1.00 - 4.00 mm |
Recommended Tool Holders
Maximum rigidity is essential for heavy roughing. Use DCLNR/L 12 or MCLNR/L 12 series holders:
Shop DCLNR 12 HoldersPro-Tip: When to use GH vs MA?
GH (Heavy Duty): Use this when you need to "rip" material off. It is the strongest geometry but requires higher horsepower and a rigid machine.
UE6020 vs MC6025: UE6020 is the "Safety Grade." If you are machining a large, expensive part and cannot afford a sudden insert breakage, UE6020 is the more reliable choice for roughing.
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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.