靜態鑽孔刀座，帶內冷通道。切削液直接送到刃口，深孔排屑與刀具壽命差別最明顯。不接驅動，靠主軸帶動工件旋轉鑽孔。
Citizen 未公布對應的原廠料號，GDE1025 / GDE10254 是 Mongtec 自己的型號；請直接提供機台型號與刀位，我們對照圖面確認。本款不使用夾頭，刀具直接夾持；最大刀柄 19.05 mm；刀座柄徑 25 / 25.4 mm。
Mongtec Precision 為台灣品牌，台中設計製造。
| Mongtec model | GDE1025 / GDE10254 |
|---|---|
| Machine brand | Citizen |
| Citizen reference code | — (Mongtec model, no direct OEM reference published) |
| Holder type | Static drilling toolholders (internal coolant) |
| Max tool shank | 19.05 mm |
| Holder shank diameter | 25 / 25.4 mm |
| Collet | — (no collet; tool clamped directly) |
| Drive | Static (not driven) |
| Max speed | — |
| Brand | Mongtec Precision Inc. — Taiwanese brand, designed and engineered in Taichung, Taiwan |
| Model | Type | Max tool shank | Collet | Drive |
|---|---|---|---|---|
| SAU825 | Sleeves | 25.4 mm | — | Static |
| MSC507 | Axial toolholders | 7.0 mm | ER11 | 1:1 · 10,000 rpm |
| GDF1801 | Static 4 holes drilling toolholders | 25.4 mm | — | Static |
| GDF1207 | Static 3 holes drilling toolholders | 19.05 mm | — | Static |
英文版：English version · 走心式刀座總覽 · 動力刀座 · 靜態刀塔刀座