BT-ER tool holder is a commonly used tool holder in machine tool processing. It is composed of a tool holder body and an ER collet. It is mainly used to clamp and fix straight-shank cutting tools such as drills and milling cutters machining.
1. Various specifications: ER11, ER16, ER20, ER25, ER32, ER40.
2. Easy to operate.
3. Wide applicability.
| Size | D | D1 | L | Capacity |
| BT30-ER16UM-70 | 28 | 32 | 70 | 1-10 |
| BT30-ER20UM-70 | 34 | 35 | 70 | 1-13 |
| BT30-ER25-70 | 42 | 42 | 70 | 2-16 |
| BT30-ER32-70 | 40 | 50 | 70 | 2-20 |
| BT30-ER40-70 | 50 | 63 | 70 | 3-26 |
| BT30-ER16UM-100 | 28 | 32 | 100 | 1-10 |
| BT30-ER20UM-100 | 34 | 35 | 100 | |
| BT30-ER25-100 | 42 | 42 | 100 | 2-16 |
| BT30-ER32-100 | 40 | 50 | 100 | 2-20 |
| BT40-ER16UM-70 | 28 | 32 | 70 | 1-10 |
| BT40-ER20UM-70 | 34 | 35 | 70 | 1-13 |
| BT40-ER25-70 | 42 | 42 | 70 | 2-16 |
| BT40-ER32-70 | 50 | 50 | 70 | 2-20 |
| BT40-ER40-80 | 50 | 63 | 80 | 3-26 |
| BT40-ER16UM-100 | 28 | 32 | 100 | 1-10 |
| BT40-ER20UM-100 | 34 | 35 | 100 | 1-13 |
| BT40-ER25-100 | 42 | 42 | 100 | 2-16 |
| BT40-ER32-100 | 50 | 50 | 100 | 2-20 |
| BT40-ER40-100 | 50 | 63 | 100 | 3-26 |
| BT40-ER16UM-160 | 28 | 32 | 160 | 1-10 |
| BT40-ER20UM-160 | 34 | 35 | 160 | 1-13 |
| BT40-ER25-160 | 42 | 42 | 160 | 2-16 |
| BT40-ER32-160 | 50 | 50 | 160 | 2-20 |
| BT40-ER40-160 | 50 | 63 | 160 | 3-26 |
| BT40-ER16UM-200 | 28 | 32 | 200 | 1-10 |
| BT40-ER20UM-200 | 34 | 35 | 200 | 1-13 |
| BT40-ER25-200 | 42 | 42 | 200 | 2-16 |
| BT40-ER32-200 | 50 | 50 | 200 | 2-20 |
| BT40-ER40-200 | 50 | 63 | 200 | 3-26 |
| Size | D | D1 | L | Capacity |
| BT50-ER16UM-70 | 28 | 32 | 70 | 1-10 |
| BT50-ER20UM-70 | 34 | 35 | 70 | 1-13 |
| BT50-ER25-70 | 42 | 42 | 70 | 2-16 |
| BT50-ER32-70 | 40 | 50 | 70 | 2-20 |
| BT50-ER40-80 | 63 | 63 | 80 | 3-26 |
| BT50-ER50-100 | 64 | 78 | 100 | 6-34 |
| BT50-ER16UM-100 | 28 | 32 | 100 | 1-10 |
| BT50-ER20UM-100 | 34 | 35 | 100 | 1-13 |
| BT50-ER25-100 | 42 | 42 | 100 | 2-16 |
| BT50-ER32-100 | 50 | 50 | 100 | 2-20 |
| BT50-ER40-100 | 63 | 63 | 100 | 3-26 |
| BT50-ER16UM-160 | 28 | 32 | 160 | 1-10 |
| BT50-ER20UM-160 | 34 | 35 | 160 | 1-13 |
| BT50-ER25-160 | 42 | 42 | 160 | 2-16 |
| BT50-ER32-160 | 50 | 50 | 160 | 2-20 |
| BT50-ER40-160 | 63 | 63 | 160 | 3-26 |
| BT50-ER16UM-200 | 28 | 32 | 200 | 1-10 |
| BT50-ER20UM-200 | 34 | 35 | 200 | 1-13 |
| BT50-ER25-200 | 42 | 42 | 200 | 2-16 |
| BT50-ER32-200 | 50 | 50 | 200 | 2-20 |
| BT50-ER40-200 | 63 | 63 | 200 | 3-26 |
| BT50-ER25-250 | 42 | 42 | 250 | 2-16 |
| BT50-ER32-250 | 50 | 50 | 250 | 2-20 |
| BT50-ER40-250 | 63 | 63 | 250 | 3-26 |
| BT50-ER25-300 | 42 | 42 | 300 | 2-16 |
| BT50-ER32-300 | 50 | 50 | 300 | 2-20 |
| BT50-ER40-300 | 63 | 63 | 300 | 3-26 |
| Runout: standard and 100mm 0.003 mm | ||||
| 160mm 0.005mm | ||||
| Cooling: AD; AD/B can be made by request. | ||||
| Balancing: G6.3/15000 RPM; | ||||
| Balancing G2.5 can be made by request. | ||||
| Usage: for clamping tools with straight | ||||
| shank in collets DIN 6499. | ||||
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