| Mongtec model | GDF1207 |
|---|---|
| Machine brand | Citizen |
| Citizen reference code | GDF1207 |
| Holder type | Static 3 holes drilling toolholders |
| Max tool shank | 19.05 mm |
| Holder shank diameter | 31 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 |
Source: Mongtec Swiss Type Toolholders catalogue, Ver 2026.07.
Swiss-type (sliding headstock) lathes hold their tooling in fixed positions on a gang or comb layout rather than in a rotating turret. Each position is machine-specific: the holder body, the mounting face and the drive coupling are defined by the machine builder, which is why a Swiss-type holder is identified by the builder's own reference code rather than by a BMT or VDI size.
GDF1207 is a static position — the tool does not rotate. It holds the cutting tool rigidly for turning, drilling or boring while the workpiece turns.
Mongtec builds GDF1207 to the Citizen reference GDF1207, so it occupies the same holder position on the machine. That reference is the fastest way to specify what you need: quote the code from your machine's tooling list and Mongtec engineering matches it, then confirms the fit against your actual machine and station before quoting.
Citizen is a registered trademark of its respective owner. Mongtec Precision is an independent manufacturer with no affiliation to, endorsement by or licence from Citizen. The Citizen reference code is quoted only to identify which holder position and machine the Mongtec part is built for; fit is confirmed by Mongtec engineering at RFQ.
| Model | Type | Max tool shank | Collet | Drive |
|---|---|---|---|---|
| SAU825 | Sleeves | 25.4 mm | — | Static |
| GDE1025 / GDE10254 | Static drilling toolholders (internal coolant) | 19.05 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 is built to the Citizen reference GDF1207 for Citizen Swiss-type (sliding headstock) lathes. Holder positions differ between machine generations, so send Mongtec your machine model and the station you want to use and engineering confirms the fit before quoting.
Mongtec builds GDF1207 to the Citizen reference so that it occupies the same holder position. Mongtec is an independent manufacturer and is not affiliated with Citizen; interchange in your specific machine and setup is confirmed by Mongtec engineering at RFQ.
GDF1207 takes tools up to 19.05 mm, on a 31 mm holder shank. Collets are supplied separately — tell Mongtec the shank diameters you intend to run and they are quoted with the holder.
Send the machine model, the station you want to use and the tools you intend to run. Anything you do not know, Mongtec works out from the machine model — an incomplete enquiry is still worth sending. Dimensioned drawings are supplied by email once the enquiry is open.
All Swiss-type toolholders · Citizen machines · All Mongtec article numbers