Mongtec Precision, a Taiwanese tooling brand headquartered in Taichung, Taiwan, supplies BMT and VDI (DIN 69880) driven tool
holders, static holders and quick-change tooling for ROMI CNC lathes and turning centers. Select your machine below,
or contact engineering if your model is not listed
— interface dimensions are confirmed per machine at RFQ.
Confirmed per machine configuration at RFQ (not yet published for this model — the public machine specifications are not consistent; Mongtec engineering confirms it against the actual turret drawing)
Mongtec driven tool line — at a glance
Figures below are Mongtec's own published line specifications (mongtec-tools.com, accessed 2026-07-20). They describe the capability range of the product line; the rating of a specific unit for a specific machine is confirmed by Mongtec engineering at RFQ.
Turret interfaces supplied
BMT (face-and-taper), VDI polygonal shank to DIN 69880, and PSC polygon shank coupling to ISO 26623
Driven tool 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 published for the Mazak-compatible 0° driven tool line; other families confirmed at RFQ
No blanket published figure — quoted per order after interface, quantity and customisation are reviewed
On turret standards: VDI is codified in DIN 69880 and the PSC polygon shank coupling in ISO 26623. BMT (Base Mounted Turret) is a widely adopted de facto industry interface but is not published by ISO or DIN — two turrets both labelled “BMT65” can differ in detail between machine builders. Mongtec therefore verifies the actual turret dimensions of the stated machine before confirming fitment.
FAQ
Which turret interface do ROMI lathes use?
It depends on the machine, not on the brand. Across the 7 ROMI models documented on this site the published interfaces are: BMT75 on 1 model (only GL 450 M/Y); BMT45 on 1 model (only GL 250 Y/S); BMT55 on 1 model (only GL 300 Y/S); BMT65 on 1 model (only GL 350 M/Y/S). A further 3 models are not yet published with an interface and are confirmed per configuration at RFQ. Some models appear under more than one interface because the same designation ships with different turret options. Send the model designation and turret station count and Mongtec engineering confirms it against the actual turret drawing.
Will a Mongtec driven tool holder fit my ROMI turret?
Mongtec supplies on the same open machine-side standards ROMI turrets use — BMT face-and-taper, VDI polygonal shank to DIN 69880, and PSC polygon coupling to ISO 26623. Because BMT is an industry de-facto standard rather than an ISO or DIN standard, fitment is confirmed per machine: send the model designation and turret station count (a photo of the turret face or the machine spec sheet helps) and Mongtec engineering confirms it against the actual turret drawing before quoting.
My ROMI model is not in the list above — can you still supply?
In most cases yes. The list covers models already documented by Mongtec; it is not the limit of what Mongtec can supply. Custom and special-configuration units are a standard part of the work, and Mongtec supplies turret interfaces beyond the article numbers published on this site. Send the model designation and turret station count and engineering will confirm.
Do you supply static holders and boring bar holders as well as driven tools?
Yes. Static turning, boring bar, facing, cut-off and blank holders are supplied on the same turret interfaces as the driven units, alongside quick-change tooling and angle heads.
What is the lead time?
Mongtec does not publish a blanket lead time. It is confirmed according to the items and quantities the customer requests, once interface, quantity and any customisation are reviewed. Request a quote for a project-specific answer.
Does Mongtec repair driven tools from other brands used on ROMI machines?
Mongtec's Taiwan service centre works on driven tool holders and angle heads. Whether a specific third-party brand and model is covered is confirmed case by case on request.
Turret interfaces for the 6 ROMI models on this page are confirmed at RFQ. Published machine-builder specifications do not state the interface consistently enough for us to print it here, and printing a guess would be worse than printing nothing — a holder ordered against a wrong interface does not mount.
What we need to quote a ROMI machine
Three things get you a firm quote: the machine model and year, a photograph of the turret face, and the tools you intend to run (drill and tap sizes, or end mill diameter). Anything you do not know we work out from the machine model — an incomplete enquiry is still worth sending, and the interface check costs you nothing.
Why we will not sell against a label. BMT is an industry de-facto standard, not an ISO or DIN published one, so bolt circle, key position and drive coupling can differ between machine builders at the same nominal size. VDI shanks follow DIN 69880, but pocket depth, clamping system and drive coupling still vary. We check the article number against the actual turret drawing before quoting, which is why a holder from us arrives and mounts.