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Our BT series steep taper shaft holders are a classic. They are a widely popular clamping solution traditionally used for milling spindles. Easy to operate, robust, precise – covering a vast range of applications.
> superb precision, low runout accuracy
> excellent wear resistency
> high clamping force, simple balancing
> quick and easy insertion and detach
| Tool Holder System | Holder Type | Collet Type | Collet Range | Cutter Dia [mm] | Combined runout accuracy at 4D [µm] | Main features | Download PDF |
|---|---|---|---|---|---|---|---|
| BT Collet Chuck  | BT30 | ER | ER 8 - ER 32 | 1.0 - 20.0 | ≤ 5 | Ultra precise taper hole Dimensional precision ≤ 2 µm Cylindricity ≤ 1 µm Customized, extra wear resistant stainless steel | |
| BT40 | ER 16 - ER 40 | 1.0 - 30.0 | |||||
| BT50 | ER 32 - ER 40 | 2.0 -30.0 | |||||
| BT30 | SK | SK 6 - SK 25 | 1.0 - 25.0 | ||||
| BT40 | SK 10 - SK 25 | 2.0 - 25.0 | |||||
| BT50 | SK 16 - SK 25 | 3.0 - 25.0 | |||||
| BT30 | KR | KR 11 - KR 36 | 1.0 - 24.0 | ||||
| BT40 | KR 16 - KR 36 | 2.0 - 24.0 | |||||
| BT50 | KR 25 - KR 36 | 3.0 - 24.0 | |||||
| BT Shrink Fit Chuck  | BT30 | / | ER 11 - ER 32 | 3.0 - 14.0 | ≤ 2 | ||
| BT40 | SK 10 - SK 25 | 4.0 - 14.0 | |||||
| BT50 | KR 16 - KR 36 | 4.0 - 14.0 |