圆鼻铣刀，看起来有点像牛鼻子，所以通常俗称“牛鼻刀”，也叫R角立铣刀。
主要用于模具毛坯的粗加工、平面精加工和侧面精加工，特别适用于材料硬度较高的模具的粗加工。
尤其是在粗加工时，因为圆鼻刀底部是平的，圆鼻刀的水平刀间距可以用的比球刀更大。在精加工时，它同样拥有与球刀一样的优点，所以刀间距也可以可用更大的数值。因此圆鼻刀不论是用于粗加工以至于精加工，都是非常合适的选择。
| 序号 | 规格 型号 | 刃径R角 | 刃长 L1 | 柄径 d | 总长 L | 齿数 F |
| 1 | D1R0.2x3xd4x50Lx4F | 1R0.2 | 3 | 4 | 50 | 4 |
| 2 | D1.5R0.2x4.5xd4x50Lx4F | 1.5R0.2 | 4.5 | 4 | 50 | 4 |
| 3 | D2R0.2x6xd4x50Lx4F | 2R0.2 | 6 | 4 | 50 | 4 |
| 4 | D2.5R0.2x7.5xd4x50Lx4F | 2.5R0.2 | 7.5 | 4 | 50 | 4 |
| 5 | D3R0.2x9xd4x50Lx4F | 3R0.2 | 9 | 4 | 50 | 4 |
| 6 | D3R0.2x12xd4x75Lx4F | 3R0.2 | 12 | 4 | 75 | 4 |
| 7 | D3R0.2x15xd4x100Lx4F | 3R0.2 | 15 | 4 | 100 | 4 |
| 8 | D3.5R0.2x10xd4x50Lx4F | 3.5R0.2 | 10 | 4 | 50 | 4 |
| 9 | D4R0.2x10xd4x50Lx4F | 4R0.2 | 10 | 4 | 50 | 4 |
| 10 | D4R0.2x14xd4x75Lx4F | 4R0.2 | 14 | 4 | 75 | 4 |
| 11 | D4R0.2x16xd4x100Lx4F | 4R0.2 | 16 | 4 | 100 | 4 |
| 12 | D5R0.2x13xd6x50Lx4F | 5R0.2 | 13 | 6 | 50 | 4 |
| 13 | D5R0.2x15xd6x75Lx4F | 5R0.2 | 15 | 6 | 75 | 4 |
| 14 | D5R0.2x18*d6x100Lx4F | 5R0.2 | 18 | 6 | 100 | 4 |
| 15 | D6R0.2x15xd6x50Lx4F | 6R0.2 | 15 | 6 | 50 | 4 |
| 16 | D6R0.2x20xd6x75Lx4F | 6R0.2 | 20 | 6 | 75 | 4 |
| 17 | D6R0.2x25xd6x100Lx4F | 6R0.2 | 25 | 6 | 100 | 4 |
| 18 | D8R0.2x20xd8x60Lx4F | 8R0.2 | 20 | 8 | 60 | 4 |
| 19 | D8R0.2x25xd8x75Lx4F | 8R0.2 | 25 | 8 | 75 | 4 |
| 20 | D8R0.2x30xd8x100Lx4F | 8R0.2 | 30 | 8 | 100 | 4 |
| 21 | D10R0.2x25xd10x75Lx4F | 10R0.2 | 25 | 10 | 75 | 4 |
| 22 | D10R0.2x30xd10x100Lx4F | 10R0.2 | 30 | 10 | 100 | 4 |
| 23 | D12R0.2x30xd12x75Lx4F | 12R0.2 | 30 | 12 | 75 | 4 |
| 24 | D12R0.2x35xd12x100Lx4F | 12R0.2 | 35 | 12 | 100 | 4 |
