The Haas ST-25 / ST-25Y uses a BMT65 (Y-axis hybrid turret) turret interface. Mongtec Precision, a Taiwanese tooling brand headquartered in Taichung, Taiwan, supplies driven tool holders and static tooling on the open machine-side BMT and VDI (DIN 69880) standards used by this machine class. The exact Mongtec model for your machine configuration is confirmed by Mongtec engineering at RFQ, and every driven unit ships with an individual inspection report.
| Machine brand | Haas |
|---|---|
| Model | ST-25 / ST-25Y |
| Turret interface | BMT65 (Y-axis hybrid turret) |
| Driven tool line speed | 6,000–12,000 rpm standard (up to 32,000 rpm with speed increaser) |
| Max torque | Up to 160 Nm (line capability; unit rating confirmed at RFQ) |
| Coolant | Internal / external, up to 100 bar |
| Runout | ≤0.003 mm (0° axial driven line) |
| Quality assurance | Each driven unit ships with an individual inspection report |
Haas turret rule: ST-10/15/20/25/30/35 base models and the SS versions use a BOT bolt-on turret (bolt patterns 45×70, 45×80, 60×50.5 and 70×105 mm); Y-axis models (ST-20Y, ST-25Y, ST-30Y, ST-35Y, DS-30Y) use the BMT65 hybrid turret. The optional VDI turret is confirmed per machine.
TOOL HOLDER SELECTION GUIDE Ver 2026.08 (PDF, 2.6 MB)
Models listed in this catalogue section: BMT65 Series:ST-20Y / ST-25Y / ST-30Y / ST-35Y / DS-30Y
| Article no. | Tool clamping |
|---|---|
| M76484 | 25 |
| M85484 | Ø40 |
| M66484 | Ø25 |
| M56484 | Ø32 |
| M86484 | Ø40 |
| M36584 | Ø25 |
| M66584 | Ø40 |
| M76584 | Ø50 |
| M37584 | Ø25 |
| M67584 | Ø40 |
| M77584 | Ø50 |
| M75484 | 25 |
| M18684 | Ø25 |
| M94484 | Ø32 |
| M38684 | Ø40 |
| M49484 | Ø25 |
| M25484 | Ø32 |
| M52084 | Ø40 |
| M55484 | 25 |
| M06484 | 25 |
| M26484 | Ø25 |
| M46484 | Ø25 |
| M95484 | SH32 |
| M96584 | 25/20 |
| M36484 | 25 |
| M17584 | 25/20 |
| M16484 | 25 |
| M3227 | ER32 |
| M0227 | ER32 |
Article numbers with a specification page on this site: M0227, M1227, M2427, M2527, M3227, M3427, M4027, M5127, M6227, M7127, M7427, M8427, M9327
Mongtec also supplies BMT40, BMT60, BMT68 and BMT80 holders and builder-specific interfaces (Mazak, Nakamura-Tome, Haas BOT, Okuma BOT, Muratec BOT) — the 228 article numbers published here are a subset of the range. Mongtec tooling is exported to five continents and supplied to machine-tool builders. Lead time is confirmed per item and quantity at quotation.
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| Article no. | Type | Collet / coupling | Ratio | Max speed | Torque |
|---|---|---|---|---|---|
| M9327 | Axial Tool Holder | — | 1:1 | 6000 rpm | 32 Nm |
| M3227 | Axial Tool Holders-B65,Internal/Through Coolant | ER32 | 1:1 | 6000 rpm | 70 Nm |
| M3427 | Axial Tool Holders-B65,Internal/Through Coolant | ER40 | 1:1 | 6000 rpm | 100 Nm |
| M2427 | Radial Tool Holder | — | 1:1 | 6000 rpm | 32 Nm |
| M0227 | Radial Tool Holders-B65 | ER32 | 1:1 | 6000 rpm | 70 Nm |
| M1227 | Radial Tool Holders-B65 | ER40 | 1:1 | 5300 rpm | 100 Nm |
| M2527 | Radial Tool Holders-B65 | ER32 | 1:1 | 6000 rpm | 70 Nm |
| M4027 | Axial Tool Holders-B65,Internal/Through Coolant | ER32 | 1:1 | 5300 rpm | 70 Nm |
| M5127 | Radial Tool Holders-B65 | ER32 | 1:1 | 6000 rpm | 70 Nm |
| M6227 | Radial Tool Holders-B65 | ER32 | 1:1 | 6000 rpm | 70 Nm |
Listed from the Mongtec Tool Holders — VDI & BMT, Ver 2026.3 catalogue for the BMT65 turret interface. This is the published range for that interface size, not a confirmed fit for this specific machine configuration — Mongtec engineering verifies interface dimensions, clearance and drive coupling per machine at RFQ. Ask engineering to confirm →
This machine uses a BMT65 turret interface. Mongtec publishes the following static (non-driven) turret holders for BMT65 — OD, double-OD, ID and face types:
Ordering codes are machine-builder specific. The designations below identify the holder type and its dimensions. Because mounting details differ between machine builders even within the same nominal turret size, the same BMT specification can carry a different Mongtec article code depending on the machine it is built for — Mongtec engineering assigns the correct code for your machine at RFQ.
| Turret | Holder type | Type designation | C | K | G | H | X | A | B | E | Weight |
|---|---|---|---|---|---|---|---|---|---|---|---|
| BMT65 | OD | C7520 | 96 | 131 | 75 | 20 | 20 | 18 | 73 | 70 | 4.97 kg |
| BMT65 | OD | C7525 | 95 | 131 | 75 | 25 | 25 | 18 | 73 | 70 | 4.97 kg |
| BMT65 | OD | C8025 | 95 | 131 | 80 | 25 | 25 | 18 | 73 | 70 | 5.25 kg |
| BMT65 | Double OD | C7520 | 97 | 131 | 75 | 20 | 21 | 18 | 73 | 70 | 6.10 kg |
| BMT65 | ID | B6032 | 86 | 105 | 90 | 60 | 32 | 15 | 64 | 64 | 5.10 kg |
| BMT65 | ID | B6040 | 86 | 105 | 90 | 60 | 40 | 15 | 64 | 64 | 5.10 kg |
| BMT65 | ID | B7032 | 86 | 105 | 100 | 70 | 32 | 15 | 64 | 64 | 5.96 kg |
| BMT65 | ID | B7040 | 86 | 105 | 100 | 70 | 40 | 15 | 64 | 64 | 4.90 kg |
| BMT65 | ID | B8032 | 86 | 105 | 109 | 80 | 32 | 15 | 64 | 64 | 5.80 kg |
| BMT65 | ID | B8540 | 86 | 105 | 115 | 85 | 40 | 15 | 64 | 64 | 5.80 kg |
| BMT65 | Face | F7025 | 95 | 106 | 70 | 25 | 25 | 18 | 93 | 70 | 4.13 kg |
| BMT65 | Face | F9525 | 96 | 105 | 95 | 25 | 25 | 18 | 73 | 70 | 5.62 kg |
Dimensions in mm, from the Mongtec Static Turret Toolholders, Ver 2026.07 catalogue. Machine platforms named for the BMT65 turret size in that catalogue: DN Solutions (Doosan), Goodway, Haas, Hardinge, Hwacheon, Hyundai WIA, Jyoti, Samsung (SMEC), Victor. This is the published range for those turret sizes, not a confirmed fit for a specific machine configuration — Mongtec engineering verifies interface dimensions, clearance, shank size and the correct article code per machine at RFQ. Ask engineering to confirm →
Mongtec publishes 11 BMT65 driven (live) tool holder article numbers, each with collet, gear ratio, maximum speed and torque. Browse all BMT65 article numbers →
Representative photographs of Mongtec driven and static turret tooling in the BMT65 class. These are production units from the Mongtec range, not renderings — but they are shown as examples of the BMT65 product family, not as the confirmed article number for this machine. Mongtec engineering verifies the interface, clearance and correct article code for your specific machine at RFQ.
Mongtec supplies BMT and VDI (DIN 69880) driven tool holders and static tooling compatible with the Haas turret platform. Interface: BMT65 (Y-axis hybrid turret). The exact configuration is confirmed by Mongtec engineering at RFQ.
Yes. BMT and VDI are open machine-side standards, so switching supplier does not require any turret modification. Mongtec also publishes cross-reference pages for WTO, Heimatec, EWS, Eppinger, BIG and other brands.
Lead time is quoted per order and ships from Taichung, Taiwan. Every Mongtec driven tool holder is inspected before shipment (runout, torque, balancing) and ships with an individual inspection report.
This page covers both the standard and the Y-axis version of this machine, and they take different turrets. Y-axis models (ST-20Y, ST-25Y, ST-30Y, ST-35Y, DS-30Y) use a BMT65 turret — standard Mongtec BMT65 article numbers apply. The non-Y turning models use a bolt-on BOT turret (or VDI30 depending on the option), which Mongtec supplies to the bolt pattern.
Turret coverage: BMT65 — Haas ST-20Y, ST-25Y, ST-30Y, ST-35Y, DS-30Y. BOT — Haas ST-10, ST-15, SL-20, SL-30, SL/ST-40, TL-15, TL-25, DS-30, ST-20/25/30/35.
Mongtec driven and static tool holders are exported worldwide across five continents, and are supplied to machine tool manufacturers as well as to end users. Lead time is confirmed against the items and quantity you need.
To quote we need: the machine model and turret designation, the station count, a turret interface drawing or a clear photo of the turret face, the holder orientation (axial or radial) and the clamping or collet size you need, and the quantity. A drawing of the holder you are replacing works just as well.
Email info@mongtec.com to discuss your application and request drawings, or send an enquiry here. Mongtec engineering confirms the fit against your turret before quoting.
All BMT65 driven tool holders · BMT65 static turret holders · All 228 article numbers with full specification · How to choose a driven tool holder · PSC / ISO 26623 tooling
Machine builders regularly ship the same model with different turrets — station count, model suffix and the number of keys all change the mounting. The Hardinge Conquest H51 is BMT55 in the 12-station build and BMT45 in the 16-station build; the Okuma GENOS L300 M is VDI40, while the L300 MW/MYW uses a 65×73 mm bolt pattern. This is the single most common reason a driven tool holder arrives and will not bolt on. BMT bolt pattern reference — 38 patterns by machine builder →
Send your model and a photo of the turret face — we confirm the fit before quoting →
Whether a holder mounts is decided by the turret bolt pattern and the drive coupling, not by the machine name alone. The types below are published by Mongtec for this interface; the exact article number is confirmed against the actual turret drawing at RFQ.
BMT65 article numbers · BMT bolt pattern reference (38 patterns) · All driven tool types and turret interfaces