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 Okuma 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.
It depends on the machine, not on the brand. Across the 64 Okuma models documented on this site the published interfaces are: BOT on 12 models (such as ES-L 6 M, ES-L 8 M, ES-L10II-M); VDI40 on 5 models (such as GENOS L300 MW/MYW, LB / LU 3000M, LB / LU 4000M); VDI30 on 1 model (only LB / LU 2000M). A further 46 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.
Okuma turrets are often described as Okuma-specific — can Mongtec still supply?
Yes. Okuma machines appear here with BOT and with VDI (DIN 69880) turrets depending on the machine. Where the interface is Okuma-specific rather than a published standard, Mongtec supplies to the actual turret drawing — that is normal work, not an exception. Send the model designation and turret station count.
Will a Mongtec driven tool holder fit my Okuma turret?
Mongtec supplies on the same open machine-side standards Okuma 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 Okuma 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 quality documentation ships with the tooling?
Every driven unit ships with an individual inspection report for that specific unit — measured values, not a generic batch certificate.
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 Okuma 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.
Of the 12 models covered here, 3 have a turret interface we have been able to confirm from published machine-builder specifications. The rest are confirmed at RFQ — we would rather leave a field blank than guess it.
Most enquiries begin with one axial holder for face drilling and tapping and one radial holder for cross work. These are the published Mongtec article numbers for the interfaces above — a starting point for the conversation, not a confirmed fit for your specific machine:
Interface
Article no.
Orientation
Collet
Max speed
Torque
What we need to quote a OKUMA 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.