Browse all 228 article numbers with full specification →
The interface decides what bolts to your turret. The type decides what the tool can actually do. Mongtec publishes these families across BMT40–BMT85:
Some machine builders use their own bolt pattern rather than a standard BMT size. A standard BMT holder will not mount on these, so they need a dedicated family:
| Interface | Standard | Article numbers | Lathe models on this site | Browse |
|---|---|---|---|---|
| VDI16 | VDI (DIN 69880) | 8 | 0 | VDI16 article numbers |
| VDI20 | VDI (DIN 69880) | 9 | 0 | VDI20 article numbers |
| VDI25 | VDI (DIN 69880) | 8 | 1 | VDI25 article numbers |
| VDI30 | VDI (DIN 69880) | 62 | 8 | VDI30 article numbers |
| VDI40 | VDI (DIN 69880) | 75 | 22 | VDI40 article numbers |
| VDI50 | VDI (DIN 69880) | 16 | 1 | VDI50 article numbers |
| VDI60 | VDI (DIN 69880) | 3 | 1 | VDI60 article numbers |
| BMT45 | BMT (machine-builder spec) | 7 | 8 | BMT45 article numbers |
| BMT55 | BMT (machine-builder spec) | 19 | 14 | BMT55 article numbers |
| BMT65 | BMT (machine-builder spec) | 11 | 25 | BMT65 article numbers |
| BMT75 | BMT (machine-builder spec) | 6 | 1 | BMT75 article numbers |
| BMT85 | BMT (machine-builder spec) | 4 | 0 | BMT85 article numbers |
Article numbers from the Mongtec VDI & BMT Driven Tools catalogue, Ver 2026.07.
Driven (live) tool holders from the Mongtec range — axial and radial types with ER collet chucks, for BMT and VDI turret interfaces. Photographs of actual production units.
VDI (per DIN 69880) is a cylindrical-shank interface. The holder locates on a ground shank and is pulled against a serrated face by a drawbar or clamping screw. Sizes are named after the shank diameter in millimetres: VDI16, VDI20, VDI25, VDI30, VDI40, VDI50, VDI60. It is the common interface on European-built turrets and on many disc-type turrets.
BMT (Base Mount Turret) is a flange interface. The holder bolts directly onto the turret face on a defined bolt-circle pattern, which gives higher rigidity and better repeatability under heavy milling loads. Sizes are named after the mounting pattern: BMT45, BMT55, BMT65, BMT75, BMT85. The pattern is defined by the machine builder rather than by a single public standard, so the same BMT size from different builders can differ in detail.
Both are open machine-side interfaces. Changing tooling supplier does not require any modification to the turret — which is why a Mongtec holder can replace an OEM or European-brand holder of the same interface.
BMT bolt patterns by machine builder — reference table of 38 turret bolt patterns.
Angle heads for machining centres · tooling for 81 lathe builders (133 published models) — BT30, BT40, BT50, HSK-A63, HSK-A100 right-angle machining heads.