Drill Insert WCMX R-51 RT300 for Efficient Solid Drilling
With the WCMX R-51 drill insert in the RT300 grade, machining professionals receive a robust and versatile tool. This indexable insert is tailored to the demanding machining of stainless steel and steel, making it ideal for use in indexable drills and U-drill systems. The combination of a PVD coating and a durable carbide substrate creates excellent conditions for uniform edge wear and high process stability under varying conditions. Consequently, this system supports efficient workflows in both serial and single-part production.
Suitable materials

Technical data
- Insert shape: WCMX
- Operation: Drilling
- Primary application: Stainless steel (M10-M25) and steel (P15-P25)
- Coating: PVD-coated RT300 carbide grade
- Packaging unit: 10 pieces per pack
Dimensions of the WCMX R-51 RT300 drill insert
|
Item Nr. |
L |
I.C. |
S |
d |
r |
| WCMX 030208-R-51 RT300 |
3201061 |
3,8 |
5,56 |
2,38 |
2,8 |
0,8 |
| WCMX 040208-R-51 RT300 |
3201062 |
4,3 |
6,35 |
2,38 |
3,1 |
0,8 |
| WCMX 050308-R-51 RT300 |
3201063 |
5,4 |
7,94 |
3,18 |
3,2 |
0,8 |
| WCMX 06T308-R-51 RT300 |
3201064 |
6,5 |
9,525 |
3,97 |
3,7 |
0,8 |
| WCMX 080412-R-51 RT300 |
3201065 |
8,7 |
12,7 |
4,76 |
4,3 |
1,2 |
Cutting data
|
Stainless Steel |
|
Vc (m/min) |
f (mm/rev.) |
| WCMX 030208-R-51 RT300 |
100-180 |
0,05-0,12 |
| WCMX 040208-R-51 RT300 |
100-180 |
0,05-0,12 |
| WCMX 050308-R-51 RT300 |
100-180 |
0,05-0,14 |
| WCMX 06T308-R-51 RT300 |
100-180 |
0,05-0,16 |
| WCMX 080412-R-51 RT300 |
100-180 |
0,05-0,20 |
Applications
This WCMX insert reveals its full potential in modern indexable drills (U-drills) for solid drilling applications. It is specifically designed for machining stainless steel as well as various structural and tool steels. Thanks to the well-engineered R-51 chipbreaker, the cutting insert is also suitable for operations where reliable chip control is essential to prevent chip jamming and workpiece damage.
Special features
The PVD coating effectively protects the tool against abrasive wear and built-up edge formation, which frequently occur during stainless steel machining. Furthermore, the robust substrate of the RT300 grade provides the necessary toughness to reliably absorb slightly interrupted cuts or vibrations during the drilling process. These characteristics make the indexable insert a well-thought-out solution for professional use.