Mitsubishi WCMT06T304 UTI20T Carbide Turning Inserts for Cast Iron & Steel
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MITSUBISHI WCMT06T304 UTI20T
Professional Uncoated Carbide Grade | Versatility in Cast Iron & Steel
Product Overview
The Mitsubishi WCMT06T304 UTI20T is an 80° trigon positive turning insert designed for reliability across multiple materials. Utilizing the UTI20T uncoated carbide grade, this insert provides a perfect balance between hardness and fracture toughness. It is particularly effective for general-purpose machining of cast iron and carbon steels. Whether you are performing light finishing or medium turning on a CNC lathe, the sharp cutting edge of the UTI20T ensures low cutting force and stable tool life.
ISO Model Designation Guide
Trigon 80°
7° Relief
Tolerance
Hole/Chip
IC 9.525mm
Thick 3.97mm
Radius 0.4mm
Metric vs. Imperial Comparison
| Technical Features | Metric (ISO) | Imperial (ANSI) |
|---|---|---|
| Model Number | WCMT 06T304 | WCMT 32.51 |
| Insert Size (IC) | 9.525 mm | 0.375 inch |
| Corner Radius | 0.4 mm | 0.016 inch |
Material Grade: UTI20T (Toughness Expert)
The UTI20T grade is a classic uncoated carbide substrate. Unlike coated grades that might peel under high pressure, the UTI20T maintains a consistent, sharp cutting edge. It is highly resistant to chipping, making it the primary choice for interrupted cuts or machining parts with scale and crust on the surface.
WCMT Chipbreaker Geometry
Designed with a positive rake, the WCMT geometry promotes smooth chip flow and reduces the load on the machine spindle. This makes it ideal for precision machining where thin-walled parts or small diameters require minimal vibration to maintain accuracy.
Recommended Cutting Parameters
Optimized for Cast Iron & General Steel:
- Cutting Speed (Vc): 80 - 150 m/min (Lower speeds recommended for higher toughness)
- Feed Rate (f): 0.10 - 0.25 mm/rev
- Depth of Cut (ap): 0.5 - 2.5 mm
*Note: Ensure proper lubrication for steel turning to prevent heat buildup on the uncoated edge.*
Compatible Boring Bars:
Shop SWLCR / SWGCR Tool HoldersGlobal Verified Reviews
⭐⭐⭐⭐⭐ "Very tough grade" - Liam W., USA
"I used these on old cast iron pulleys. They took the crust right off without the edge chipping like some of my coated inserts do. UTI20T is reliable."
⭐⭐⭐⭐⭐ "Original Mitsubishi" - Dieter S., Germany
"Exactly as pictured. These work great for general shop use on 1045 steel and cast iron."
⭐⭐⭐⭐ "Good Value" - Kenji O., Japan
"Stable performance for manual and CNC lathe operations. Very clean cuts."
⭐⭐⭐⭐⭐ "Fast Delivery" - Carlos M., Spain
"Authentic Mitsubishi quality. Hard to find UTI20T sometimes, glad I found this store."
⭐⭐⭐⭐⭐ "Excellent Finish" - Sanjay K., India
"For general turning in cast iron, the finish is surprisingly good for an uncoated grade."
Technical Q&A
Q: Is UTI20T better than UE6110 for steel?
A: UTI20T is tougher but lacks the wear resistance of CVD-coated UE6110 at high speeds. Choose UTI20T for interrupted cuts or cast iron; choose UE6110 for high-speed continuous steel turning.
Q: What tool holder fits this insert?
A: It fits any SWLCR or SWGCR holder that takes 06-size trigon (W-type) inserts.
Q: Does it work for Aluminum?
A: It can, but UTI20T is a K/P grade. For best results in aluminum, a polished K10 grade (like HTI10) is typically preferred to prevent sticking.
Material Choice Tip: UTI20T vs. HTI10
While both are uncoated, UTI20T is optimized for toughness (Cast Iron/Steel), whereas HTI10 is optimized for hardness (Aluminum/Non-ferrous). Always match your grade to the material hardness for maximum CNC efficiency.
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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.