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 Haas 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.
Turret interfaces listed for Haas in Mongtec’s TOOL HOLDER SELECTION GUIDE
Mongtec’s selection guide lists Haas machines under the turret interfaces below. Where a model on this site appears in the guide, that interface is the one Mongtec quotes against; models not named in the guide are confirmed from a photo of the turret face. The same data drives the AI assistant on this site.
Source: Mongtec TOOL HOLDER SELECTION GUIDE (PDF, 2.8 MB). Machine builders change turret designs between series and build years; the interface is always confirmed against the turret before quoting. Send the machine model and a turret photo →
The Mongtec Static Turret Toolholders, Ver 2026.07 catalogue names this machine platform for turret size BMT65. Published static (non-driven) holders — 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. 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 →
What to send for a quote
Mongtec confirms fit and quotes from four details. Email them to info@mongtec.com or use the quote form — we reply within one working day.
Machine make and full model, as shown on the machine nameplate.
Turret interface (for example BMT65 or VDI40) — if unsure, a photo of the turret face is enough.
The part number you use now, or a photo of the nameplate on the holder you are replacing.
It depends on the machine, not on the brand. Across the 41 Haas models documented on this site the published interfaces are: BOT on 30 models (such as DS-30/Y - Hybrid VB 12, SL-20 - BOT, SL-20 - Hybrid VB 12); BMT65 on 18 models (such as DS-30 / DS-30Y, ST-10 / ST-10Y, ST-15 / ST-15Y). 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.
ST-20 or ST-20Y — how do I tell which turret I have?
The Y-axis variants decide it. ST-20 and ST-20SS are normally BOT (VDI30 on some option packages); ST-20Y and ST-20SSY carry a Y axis and default to BMT65. The same logic runs across the ST range. If your machine sheet does not name the turret, send the full model designation and a photo of the turret face.
Will a Mongtec driven tool holder fit my Haas turret?
Mongtec supplies on the same open machine-side standards Haas 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 Haas 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 Haas 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.