Hold a round boring bar for internal turning and boring. The bore size and the reach you need decide the model.
| Model | C | K | G | H | X | A | B | E | Mass | Listed for |
|---|---|---|---|---|---|---|---|---|---|---|
| B6025 | 63 | 94 | 82 | 60 | 25 | 12 | 50 | 60 | 3.20 kg | DN Solutions (Doosan), Hardinge |
Hold a square-shank turning tool on the outside diameter — the workhorse station for roughing and finishing the OD.
| Model | C | K | G | H | X | A | B | E | Mass | Listed for |
|---|---|---|---|---|---|---|---|---|---|---|
| C5520 | 75 | 97 | 55 | 25 | 25 | 12 | 50 | 60 | 2.20 kg | DN Solutions (Doosan), Hardinge |
The letters are the dimension callouts used on the Mongtec drawing for this holder family. We publish the figures so you can compare envelope and mass across the range, but we deliberately do not label each letter here — which letter is which is defined on the drawing, and the drawing is what you should be working from. Mongtec supplies the full dimensioned drawing by email once an enquiry is open.
Source: Mongtec Static Turret Toolholders catalogue, Ver 2026.07.
Mongtec publishes tooling pages for these 2 models. Finding your machine here confirms the turret class, not the article number — that still comes from engineering.
A static holder clamps a turning tool or boring bar rigidly in the turret — nothing rotates in the holder itself, the workpiece does the turning. A driven (live) holder takes rotary drive from the turret so a drill or end mill can turn while the spindle is stopped. Most turrets carry a mix: static holders for the turning work, driven holders for the milling, drilling and tapping.
BMT is an industry de-facto standard, not published by ISO or DIN. Two turrets both labelled BMT40 can differ in bolt circle and key position, so the label alone is not enough. Send the machine model and a photograph of the turret face and Mongtec engineering checks it against the actual turret drawing before quoting. That check is free.
Mongtec publishes tooling pages for 2 machine models with a declared BMT40 turret. The catalogue lists these holders for DN Solutions (Doosan), Hardinge.
No. Mongtec supplies the full dimensioned drawing by email once an enquiry is open, so the drawing matches your actual machine and turret configuration.
Request BMT40 static holders →
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