油壓式是用油壓把薄壁套均勻撐向刀桿。夾持力與跳動雖然不及熱縮，但換刀只要一支六角扳手、不需要加熱設備，而且油膜本身有阻尼效果，斷續切削與震顫敏感的加工反而更穩。想兼顧換刀便利與精度時，這是務實的選擇。
BT 是 7:24 錐度、亞洲機台最普遍的形式。
Mongtec Precision 為台灣品牌，台中設計製造。
| Shank | BT (MAS 403 BT, 7/24 taper) |
|---|---|
| Clamping | Hydraulic expansion sleeve, single hex-key screw |
| Bore range | Ø6 – Ø32 mm (reduction sleeves for intermediate shanks) |
| Best for | Reaming, boring, finish milling, vibration-sensitive work |
| Article numbers | 46 |
| Brand | Mongtec Precision Inc. — Taiwanese brand, designed and engineered in Taichung, Taiwan |
| Article no. | Bore Ø d | D | D1 | L | L1 | L2 | G |
|---|---|---|---|---|---|---|---|
| BT30QHY06Q70 | Ø6 | 26 | 45 | 70 | 28 | 30 | M5 |
| BT30QHY08Q70 | Ø8 | 28 | 45 | 70 | 28.5 | 30 | M6 |
| BT30QHY10Q75 | Ø10 | 30 | 45 | 75 | 34 | 34 | M8x1 |
| BT30QHY12Q85 | Ø12 | 32 | 45 | 85 | 44 | 39 | M10x1 |
| BT30QHY14Q85 | Ø14 | 34 | 45 | 85 | 44.5 | 39 | M10x1 |
| BT30QHY16Q90 | Ø16 | 38 | 45 | 90 | 50 | 42 | M10x1 |
| BT30QHY18Q90 | Ø18 | 40 | 45 | 90 | 50.5 | 42 | M10x1 |
| BT30QHY20Q90 | Ø20 | 42 | 45 | 90 | 51 | 44 | M10x1 |
| Article no. | Bore Ø d | D | D1 | L | L1 | L2 | G |
|---|---|---|---|---|---|---|---|
| BT40QHY06Q65 | Ø6 | 26 | 44.5 | 65 | 43 | 30 | M5 |
| BT40QHY08Q65 | Ø8 | 28 | 44.5 | 65 | 44.5 | 30 | M6 |
| BT40QHY10Q65 | Ø10 | 30 | 44.5 | 65 | 44.5 | 34 | M8x1 |
| BT40QHY12Q65 | Ø12 | 32 | 44.5 | 65 | 44.5 | 39 | M10x1 |
| BT40QHY14Q65 | Ø14 | 34 | 44.5 | 65 | 44.5 | 39 | M10x1 |
| BT40QHY16Q65 | Ø16 | 38 | 50 | 65 | 44.5 | 42 | M12x1 |
| BT40QHY18Q65 | Ø18 | 40 | 50 | 65 | 44.5 | 42 | M8x1 |
| BT40QHY20Q65 | Ø20 | 42 | 50 | 65 | 45.5 | 44 | M10x1 |
| BT40QHY06Q90 | Ø6 | 26 | 44.5 | 90 | 43 | 30 | M5 |
| BT40QHY08Q90 | Ø8 | 28 | 44.5 | 90 | 43.5 | 30 | M6 |
| BT40QHY10Q90 | Ø10 | 30 | 44.5 | 90 | 44 | 34 | M8x1 |
| BT40QHY12Q90 | Ø12 | 32 | 44.5 | 90 | 44 | 39 | M10x1 |
| BT40QHY14Q90 | Ø14 | 34 | 44.5 | 90 | 44.5 | 39 | M10x1 |
| BT40QHY16Q90 | Ø16 | 38 | 50 | 90 | 44.5 | 42 | M12x1 |
| BT40QHY18Q90 | Ø18 | 40 | 50 | 90 | 44.5 | 42 | M12x1 |
| BT40QHY20Q90 | Ø20 | 42 | 50 | 90 | 45 | 44 | M12x1 |
| BT40QHY25Q100 | Ø25 | 57 | 62 | 100 | 54 | 50 | M16x1 |
| BT40QHY32Q105 | Ø32 | 64 | - | 105 | - | 54 | M16x1 |
| BT40QHY06Q150 | Ø6 | 26 | 50 | 150 | 102 | 30 | M5 |
| BT40QHY08Q150 | Ø8 | 28 | 50 | 150 | 102 | 30 | M6 |
| BT40QHY10Q150 | Ø10 | 30 | 50 | 150 | 103 | 34 | M8x1 |
| BT40QHY12Q150 | Ø12 | 32 | 50 | 150 | 103 | 39 | M10x1 |
| BT40QHY14Q150 | Ø14 | 34 | 50 | 150 | 103.5 | 39 | M10x1 |
| BT40QHY16Q150 | Ø16 | 38 | 50 | 150 | 104.5 | 42 | M12x1 |
| BT40QHY18Q150 | Ø18 | 40 | 50 | 150 | 104.5 | 42 | M12x1 |
| BT40QHY20Q150 | Ø20 | 42 | 50 | 150 | 105 | 44 | M16x1 |
| BT40QHY25Q150 | Ø25 | 57 | 62 | 150 | 104 | 50 | M16x1 |
| BT40QHY32Q150 | Ø32 | 64 | - | 150 | - | 54 | M16x1 |
| BT40QHY06Q200 | Ø6 | 26 | 44.5 | 200 | 152.5 | 30 | M5 |
| BT40QHY08Q200 | Ø8 | 28 | 44.5 | 200 | 154 | 30 | M6 |
| BT40QHY10Q200 | Ø10 | 30 | 44.5 | 200 | 154 | 34 | M8x1 |
| BT40QHY12Q200 | Ø12 | 32 | 44.5 | 200 | 155 | 39 | M10x1 |
| BT40QHY14Q200 | Ø14 | 34 | 44.5 | 200 | 155 | 39 | M10x1 |
| BT40QHY16Q200 | Ø16 | 38 | 50 | 200 | 156 | 42 | M12x1 |
| BT40QHY18Q200 | Ø18 | 40 | 50 | 200 | 156 | 42 | M10x1 |
| BT40QHY20Q200 | Ø20 | 42 | 50 | 200 | 155 | 44 | M16x1 |
| BT40QHY25Q200 | Ø25 | 57 | 62 | 200 | 157 | 50 | M16x1 |
| BT40QHY32Q200 | Ø32 | 64 | - | 200 | - | 54 | M16x1 |
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