Professional solid carbide end mill for high-performance machining
This 4-flute Solid Carbide HPC Mill with neck relief and standard length is a sophisticated solution for challenging machining tasks. The relief behind the cutting edges allows the tool to safely mill deeper contours without the shank rubbing against the workpiece. Combining a centre cutting face geometry with variable helix angles of 35°/38°, it offers high flexibility and excellent running smoothness. The specialized RT405 TiAlN high-performance coating makes this cutter an outstanding choice for universal roughing and finishing in modern CNC manufacturing.
Suitable materials

Technical data
- Mill Type: Solid Carbide HPC Mill
- Number of flutes: 4
- Helix angle: 35°/38° variable pitch
- Coating: RT405 (PVD-TiAlN)
- Design: Standard length with neck relief
- Centre cut: Centre cutting
- Packaging unit: 1 Pc
Dimensions of Solid Carbide HPC Mill with neck relief - Standard Length
|
Art. Nr. |
D |
d(h6) |
d1 |
H |
M |
L |
Flutes |
HPC-Z4-D3.0-Z RT405
|
2554101 |
3 |
6 |
2,7 |
8 |
14 |
57 |
4 |
HPC-Z4-D4.0-Z RT405
|
2554102 |
4 |
6 |
3,7 |
11 |
19 |
57 |
4 |
HPC-Z4-D5.0-Z RT405
|
2554103 |
5 |
6 |
4,7 |
13 |
21 |
57 |
4 |
HPC-Z4-D6.0-Z RT405
|
2554104 |
6 |
6 |
5,7 |
13
|
21 |
57 |
4 |
HPC-Z4-D8.0-Z RT405
|
2554105 |
8 |
8 |
7,7 |
19
|
27 |
63 |
4 |
HPC-Z4-D10.0-Z RT405
|
2554106 |
10 |
10 |
9,5 |
22
|
32 |
72 |
4 |
HPC-Z4-D12.0-Z RT405
|
2554107 |
12 |
12 |
11,5
|
26
|
38 |
83 |
4 |
HPC-Z4-D16.0-Z RT405
|
2554108 |
16 |
16 |
15,5 |
32 |
44 |
92 |
4 |
HPC-Z4-D20.0-Z RT405
|
2554109 |
20 |
20 |
19,5 |
38 |
54 |
104 |
4 |
|
Art. Nr. |
D |
d(h6) |
d1 |
H |
M |
L |
Flutes |
HPC-Z4-D3.0-W RT405
|
2551129 |
3 |
6 |
2,7 |
8 |
14 |
57 |
4 |
HPC-Z4-D4.0-W RT405
|
2551121 |
4 |
6 |
3,7 |
11 |
19 |
57 |
4 |
HPC-Z4-D5.0-W RT405
|
2551122 |
5 |
6 |
4,7 |
13 |
21 |
57 |
4 |
HPC-Z4-D6.0-W RT405
|
2551123 |
6 |
6 |
5,7 |
13
|
21 |
57 |
4 |
HPC-Z4-D8.0-W RT405
|
2551124 |
8 |
8 |
7,7 |
19
|
27 |
63 |
4 |
HPC-Z4-D10.0-W RT405
|
2551125 |
10 |
10 |
9,5 |
22
|
32 |
72 |
4 |
HPC-Z4-D12.0-W RT405
|
2551126 |
12 |
12 |
11,5
|
26
|
38 |
83 |
4 |
HPC-Z4-D16.0-W RT405
|
2551127 |
16 |
16 |
15,5 |
32 |
44 |
92 |
4 |
HPC-Z4-D20.0-W RT405
|
2551128 |
20 |
20 |
19,5 |
38 |
54 |
104 |
4 |
Cutting data
|
|
Ae |
Cutting speed |
Feed fz [mm/z] |
|
|
|
Vc[m/min] |
Ø 3-5 |
Ø 6-8 |
Ø 10 |
Ø 12-16 |
Ø 20 |
| Structural Steel |
<450 |
1/1 |
170-200 |
0,05-0,06 |
0,06-0,07 |
0,07 |
0,07-0,08 |
0,08 |
| 1/2 |
190-230 |
0,07-0,08 |
0,08-0,09 |
0,09 |
0,09-0,1 |
0,1 |
| 1/10 |
200-280 |
0,12-0,14 |
0,14-0,18 |
0,22 |
0,23-0,27 |
0,32-0,36 |
Tempered Steel
|
450-700
|
1/1 |
130-190 |
0,05-0,06 |
0,06-0,07 |
0,07 |
0,07-0,08 |
0,08 |
| 1/2 |
160-210 |
0,07-0,08 |
0,08-0,09 |
0,09 |
0,09-0,1 |
0,1 |
| 1/10 |
180-220 |
0,12-0,14 |
0,14-0,18 |
0,22 |
0,23-0,27 |
0,32-0,36 |
| Tooling Steel |
>700 |
1/1 |
120-180 |
0,05-0,06 |
0,06-0,07 |
0,07 |
0,07-0,08 |
0,08 |
| 1/2 |
150-200 |
0,07-0,08 |
0,08-0,09 |
0,09 |
0,09-0,1 |
0,1 |
| 1/10 |
170-220 |
0,12-0,14 |
0,14-0,18 |
0,22 |
0,23-0,27 |
0,32-0,36 |
| Stainless Steel |
<1100 |
1/1 |
60-90 |
0,05 |
0,05 |
0,05 |
0,05-0,06 |
0,06 |
| 1/2 |
80-100 |
0,06 |
0,06-0,07 |
0,07 |
0,07-0,08 |
0,08 |
| 1/10 |
100-130 |
0,1 |
0,1-0,12 |
0,12 |
0,14-0,16 |
0,18 |
| Cast Iron |
|
1/1 |
150-200 |
0,06 |
0,06-0,07 |
0,07 |
0,07-0,08 |
0,08 |
| 1/2 |
160-240 |
0,08 |
0,09 |
0,09 |
0,09-0,10 |
0,10 |
| 1/10 |
220-280 |
0,14-0,16 |
0,15-0,18 |
0,22 |
0,25-0,27 |
0,36 |
| Hardened Steel up to 55 HRC |
|
1/1 |
100 |
0,045-0,053 |
0,045-0,053 |
0,053 |
0,053-0,06 |
0,06 |
| 1/2 |
120 |
0,06-0,07 |
0,06-0,07 |
0,07 |
0,07-0,08 |
0,08 |
| 1/10 |
140 |
0,1-0,12 |
0,1-0,12 |
0,12-0,14 |
0,16 |
0,18 |
Applications
The HPC mill is designed for a variety of milling operations, supporting efficient workflows in diverse machining scenarios. The application range includes face milling, shoulder milling, and reliable slot milling. Thanks to its centre cutting geometry, the tool is equally suited for drill slotting, plunging, and ramping.

Special features
The unequal helix pitch of 35°/38° significantly reduces vibrations, thereby improving the achievable surface finish during finishing operations. Concurrently, the robust cutting edge preparation combined with the RT405 PVD-TiAlN coating enhances wear resistance, ensuring good results even during heavy roughing. The choice between cylindrical and Weldon shanks provides the necessary compatibility for standard tool holders.