
| R da | L1 L1 × 0.5 | L | α | D (h6) | |||
| Order No. | R | α | L1 | L | da | D | Flute |
| ERTSB30100620S | 0.5R | 6° | 20 | 60 | 3.00 | 6 | 3 |
| ERTSB30200619S | 1.0R | 6° | 19 | 60 | 3.80 | 6 | 3 |
| ERTSB30100818S | 0.5R | 8° | 18 | 60 | 3.40 | 6 | 3 |
| ERTSB30200815S | 1.0R | 8° | 15 | 60 | 3.85 | 6 | 3 |
※ The da value is average diameter at 0.5*L1
| Working Material | Cutting Application | ae (mm) | ap (mm) | Vc (m/min) | fz (mm/z) |
| Carbon Steel (S45C) | 0.1 ~ 0.2 mm | 0.5 ~ 1.0 × L1 | 100 ~ 120 | 0.01 × R | |
| Carbon Steel (S50C) | 0.1 ~ 0.2 mm | 0.5 ~ 1.0 × L1 | 70 ~ 90 | 0.008 × R | |
| Tool Steel (SKD) | 0.1 ~ 0.2 mm | 0.5 ~ 1.0 × L1 | 50 ~ 60 | 0.006 × R | |
| Stainless Steel (SUS304, SUS316) | 0.1 ~ 0.2 mm | 0.5 ~ 1.0 × L1 | 50 ~ 60 | 0.006 × R | |
| Superalloy, Inconel | da≒1.8R + ap × tan(α) | 0.1 ~ 0.2 mm | 0.5 ~ 1.0 × L1 | 15 ~ 20 | 0.004 × R |
| Titanium | (※da : average diameter at 0.5ap) RPM =Vc × 1000 da ×π | 0.1 ~ 0.2 mm | 0.5 ~ 1.0 × L1 | 30 ~ 50 | 0.006 × R |