TACO = T {Transparency}, A {Accountability}, C {Consistency}, O {Originality},
CNC BMT Driven (Live) Tool Holder / Block
CNC BMT Driven (Live) Tool Holder / Block
CNC BMT Driven (Live) Tooling
📌 Purpose:
CNC BMT Driven (Live) Tooling
is a robust and precise toolholding system used in CNC turning centers,
especially in mill-turn machines. "BMT" stands for Base
Mount Tooling, and it's known for its rigid mounting, high
repeatability, and minimal setup time—making it ideal for heavy-duty
and high-precision machining.
v What
Makes BMT Live Tooling Unique?
Ø
Direct turret mounting: BMT holders bolt
directly to the turret face using four screws and alignment keys, eliminating
the need for manual alignment like in VDI systems.
Ø
Live (Driven) Tools: These tools are
powered by the machine’s turret to perform milling, drilling, and tapping
while the workpiece remains stationary.
Ø
High rigidity: The fixed mounting ensures
better stability and surface finish, especially during aggressive cutting
operations.
v Types
of BMT Live Tool Holders
Ø
Axial (Face) Holders: Tool axis is
parallel to the spindle used for face drilling or tapping.
Ø
Radial Holders: Tool axis is
perpendicular to the spindle ideal for side milling or cross drilling.
Ø
Multi-position Holders: Allow multiple
tools in one holder for increased flexibility.
v Advantages
Over VDI
|
Feature |
BMT Tooling |
VDI Tooling |
|
Mounting |
Bolted
directly to turret face |
Inserted
into turret slot |
|
Alignment |
Self-aligning with
keys |
Requires manual
alignment |
|
Rigidity |
Higher
(better for heavy cuts) |
Moderate |
|
Setup
Time |
Faster, no
indicating needed |
Slower due to
alignment |
v Compatibility
: BMT tooling is available in various sizes (e.g., BMT45, BMT55, BMT65,
BMT75, BMT85) to match different turret configurations. It's commonly used in
machines from brands like Doosan, Mazak, Okuma, and Mori Seiki.
🏗️ Machine Compatibility:
CNC live tooling systems
can be seamlessly integrated with:
v CNC
turning centers & CNC lathe with live tooling facility – enabling
milling, drilling, and tapping operations alongside turning.
v Modern
CNC turn-mill machines – designed for high-rigidity live tooling (BMT/PTI)
and quick-change systems (VDI).
v CNC
machining centres for specific applications
v Common manufacturers that support live tooling – Haas, DMG-Mori, Mazak, Okuma, Emag, LMW
Two Types of Cooling Methods
for CNC Tool Holders
- External Cooling – Uses nozzles to direct
coolant onto the cutting area from outside the tool holder.
- Through-Tool (Internal) Cooling – Delivers
coolant directly through the tool holder and cutting tool, reaching the
cutting edge more efficiently.
🎯 How to Read the Height Dimension of
Live Tools
This infographic provides a
critical guide for CNC programmers and setup machinists on how to correctly
measure and input the "H" dimension (Height offset) for driven (live)
tools. Getting this dimension wrong can lead to tool collisions or incorrect
machining depths.
The image differentiates between
two main types of live tools: Radial (Angle) and Axial
(Straight).
1. Radial (90°) Tool Holders
v Configuration: The
tool output is at a 90-degree angle to the mounting shank. These are used for
operations like cross-drilling or milling on the diameter of a part.
v H
Dimension Definition:
Ø
"On an angle style tool the H dimension is
the distance from the flush mounting face to the centerline of the
collet."
v Visual
Reference: In the top diagram, the red arrow marked H = 72 mm starts
at the flat face where the holder mounts to the turret and ends exactly at the
center axis of the rotating collet nut. This value effectively tells the
machine "how far out" the center of the drill or mill is from the
turret face.
2. Axial (0°) Tool Holders
v Configuration: The
tool output is straight, in line with the mounting shank. These are used for
face drilling or tapping.
v H
Dimension Definition:
Ø
"On a straight style tool the H dimension
is the distance from the flush mounting face to the end face of the
collet."
v Visual
Reference: In the bottom diagram, the red arrow marked H = 55 mm measures
the total length from the turret mounting face to the very tip of the collet
nut.
v Important
Note: Unlike the radial tool where you measure to a centerline,
here you measure to a face. This offset usually needs to be added
to the length of the drill bit itself to get the total tool length offset
(Geometry Offset).
Summary for Setup
v Radial
(Angle): H = Distance to Centerline.
v Axial
(Straight): H = Distance to Face (Nut).
Correctly identifying these
values in the tool catalog or measuring them on the bench is essential for
populating the CNC machine's tool offset page correctly.
🔩 CNC BMT Driven (Live) Tool Holder as per DIN 1809
|
Model |
A |
B |
C |
D |
E |
F |
G |
H |
J |
K |
L |
M |
N |
P |
Q |
R |
|
BMT-45 |
58 |
58 |
15 |
4 |
M8 |
10 |
75 |
75 |
45 |
35 |
14 |
84 |
60 |
40 |
6 |
8.5 |
|
BMT-55 |
64 |
64 |
15 |
4 |
M10 |
14 |
85 |
85 |
55 |
40 |
16 |
104 |
75 |
30 |
8 |
8.5 |
|
BMT-65 |
70 |
73 |
18 |
5 |
M12 |
15 |
94 |
94 |
65 |
45 |
18 |
112 |
83 |
32 |
10 |
14 |
|
BMT-75 |
90 |
90 |
25 |
5 |
M12 |
15 |
112 |
112 |
75 |
55 |
23 |
110 |
80 |
43 |
14 |
15 |
|
BMT-85 |
100 |
100 |
25 |
5 |
M12 |
18 |
125 |
125 |
85 |
65 |
33.5 |
140 |
100 |
43 |
16 |
20 |
v 🧰 TACO BMT Driven (Live) Tool Holders
Ø Axial (0◦ Degrees) Driven (Live) Tool Holders: Tool axis is parallel to the spindle (ideal for face drilling).
¨ BMT Turret Axial (0◦ Degrees) Driven (Live) PTI Tool Holders:
¨ BMT Turret Axial (0◦ Degrees) Driven (Live) PTI Tool Holders:
|
Model [ Description ] Live |
Bolt Pattern |
PTI |
ØD |
L1 |
L2 |
L3 |
W |
H |
I [Ratio] |
Nmax RPM |
T Nm |
|
BMT-45 Axial PTI‐4 [C4] |
58 x 58 |
C4 |
82 |
75 |
60 |
84 |
70 |
41 |
1:1 |
5000 |
40 |
|
BMT-45 Axial PTI‐4 [C5] |
58 x 58 |
C5 |
98 |
85 |
60 |
84
|
75 |
49 |
1:1 |
4000 |
70 |
|
BMT-45 Axial PTI‐4 [C6] |
58 x 58 |
C6 |
110 |
95 |
60 |
84 |
85 |
58 |
1:1 |
3000 |
100 |
|
BMT-55 Axial PTI‐5 [C4] |
64 x 64 |
C4 |
82 |
75 |
75 |
104
|
70 |
41 |
1:1 |
5000 |
40 |
|
BMT-55 Axial PTI‐5 [C5] |
64 x 64 |
C5 |
98 |
85 |
75 |
104 |
75 |
49 |
1:1 |
4000 |
70 |
|
BMT-55 Axial PTI‐5 [C6] |
64 x 64 |
C6 |
110 |
95 |
75 |
104 |
85 |
58 |
1:1 |
3000 |
100 |
|
BMT-65 Axial PTI‐6 [C4] |
70 x 73 |
C4 |
82 |
75 |
83 |
112 |
70 |
41 |
1:1 |
5000 |
40 |
|
BMT-65 Axial PTI‐6 [C5] |
70 x 73 |
C5 |
98 |
85 |
83 |
112 |
75 |
49 |
1:1 |
4000 |
70 |
|
BMT-65 Axial PTI‐6 [C6] |
70 x 73 |
C6 |
110 |
95 |
83 |
112 |
85 |
58 |
1:1 |
3000 |
100 |
|
BMT-75 Axial PTI‐6 [C4] |
90 x 90 |
C4 |
82 |
75 |
80 |
110 |
70 |
41 |
1:1 |
5000 |
40 |
|
BMT-75 Axial PTI‐6 [C5] |
90 x 90 |
C5 |
98 |
85 |
80 |
110 |
75 |
49 |
1:1 |
4000 |
70 |
|
BMT-75 Axial PTI‐6 [C6] |
90 x 90 |
C6 |
110 |
95 |
80 |
110 |
85 |
58 |
1:1 |
3000 |
100 |
¨ BMT Turret Axial (0◦ Degrees) Driven (Live) ER Tool Holders:
¨
BMT Turret Axial (0◦ Degrees)
Driven (Live) ER Tool Holders: [DIN 1809]
|
Model [ Description ] Live |
Collet Range |
Bolt Pattern [A X B] mm |
C |
D |
E |
[G X H] mm |
H1 |
|
BMT-45 Axial ER-25 |
3-16 |
58 x 58 |
60 |
84 |
6 |
75 x 75 |
56 |
|
BMT-45 Axial ER-25 |
3-16 |
58 x 58 |
60 |
84 |
6 |
75 x 75 |
65 |
|
BMT-55 Axial ER-25 |
3-16 |
64 x 64 |
75 |
104 |
8 |
85 x 85 |
61 |
|
BMT-55 Axial ER-32 |
3-20 |
64 x 64 |
75 |
104 |
8 |
85 x 85 |
62 |
|
BMT-55 Axial ER-25 |
3-16 |
64 x 64 |
75 |
104 |
8 |
85 x 85 |
60 |
|
BMT-55 Axial ER-32 |
3-20 |
64 x 64 |
75 |
104 |
8 |
85 x 85 |
77 |
|
BMT-65 Axial ER-32 |
3-20 |
70 x 73 |
83 |
112 |
10 |
94 x 94 |
66 |
|
BMT-65 Axial ER-32 |
3-20 |
70 x 73 |
83 |
112 |
10 |
94 x 94 |
66 |
|
BMT-75 Axial ER-32 |
3-20 |
90 x 90 |
80 |
110 |
14 |
112 x 112 |
85 |
|
BMT-75 Axial ER-40 |
3-30 |
90 x 90 |
80 |
110 |
14 |
112 x 112 |
90 |
|
BMT-85 Axial ER-50 |
10-34 |
100 x 100 |
100 |
140 |
16 |
125 x 125 |
104 |
|
Model [ Description ] Live |
Ød BMT |
Ød1 |
Nmax RPM |
S [ER] |
T Nm |
I [Ratio] |
NUT |
|
BMT-45 Axial ER-25 |
45 |
14 |
8000 |
ER25 |
25 |
1:1 |
EXT |
|
BMT-45 Axial ER-25 |
45 |
14 |
6000 |
ER25 |
25 |
1:1 |
INT |
|
BMT-55 Axial ER-25 |
55 |
15 |
8000 |
ER25 |
40 |
1:1 |
EXT |
|
BMT-55 Axial ER-32 |
55 |
15 |
8000 |
ER32 |
40 |
1:1 |
EXT |
|
BMT-55 Axial ER-25 |
55 |
15 |
6000 |
ER25 |
40 |
1:1 |
INT |
|
BMT-55 Axial ER-32 |
55 |
15 |
6000 |
ER32 |
40 |
1:1 |
INT |
|
BMT-65 Axial ER-32 |
65 |
18 |
6000 |
ER32 |
70 |
1:1 |
EXT |
|
BMT-65 Axial ER-32 |
65 |
18 |
5300 |
ER32 |
70 |
1:1 |
INT |
|
BMT-75 Axial ER-32 |
75 |
23 |
4000 |
ER32 |
100 |
1:1 |
EXT |
|
BMT-75 Axial ER-40 |
75 |
23 |
4000 |
ER40 |
100 |
1:1 |
EXT |
|
BMT-85 Axial ER-50 |
85 |
33.5 |
4000 |
ER50 |
210 |
1:1 |
EXT |
"BMT driven tool holders can be manufactured according to customer-provided drawings."
¨ BMT Turret Axial (0◦ Degrees) Driven (Live) QA Tool Holders:
¨
Ø Radial (90◦ Degrees) Driven (Live) Tool Holders: Tool axis is perpendicular to the spindle (used for side milling or drilling).
¨ BMT Turret Radial (90◦ Degrees) Driven (Live) PTI Tool Holders:
¨ BMT Turret Radial (90◦ Degrees) Driven (Live) PTI Tool Holders:
|
Model [ Description ] Live |
Bolt Pattern |
PTI |
L1 |
L2 |
L3 |
L4 |
L5 |
W |
H |
I [Ratio] |
Nmax RPM |
T Nm |
|
BMT-45 Radial PTI‐4 [C4] |
58 x 58 |
C4 |
51 |
75 |
75 |
60 |
84 |
30 |
38 |
1:1 |
5000 |
40 |
|
BMT-45 Radial PTI‐4 [C5] |
58 x 58 |
C5 |
51 |
75 |
75 |
60 |
84
|
30 |
38 |
1:1 |
4000 |
70 |
|
BMT-45 Radial PTI‐4 [C6] |
58 x 58 |
C6 |
51 |
75 |
75 |
60 |
84 |
30 |
38 |
1:1 |
3000 |
100 |
|
BMT-55 Radial PTI‐5 [C4] |
64 x 64 |
C4 |
53 |
85 |
82 |
75 |
104
|
40 |
41 |
1:1 |
5000 |
40 |
|
BMT-55 Radial PTI‐5 [C5] |
64 x 64 |
C5 |
53 |
85 |
82 |
75 |
104 |
40 |
41 |
1:1 |
4000 |
70 |
|
BMT-55 Radial PTI‐5 [C6] |
64 x 64 |
C6 |
53 |
85 |
82 |
75 |
104 |
40 |
41 |
1:1 |
3000 |
100 |
|
BMT-65 Radial PTI‐6 [C4] |
70 x 73 |
C4 |
55 |
95 |
92 |
83 |
112 |
50 |
55 |
1:1 |
5000 |
40 |
|
BMT-65 Radial PTI‐6 [C5] |
70 x 73 |
C5 |
55 |
95 |
92 |
83 |
112 |
50 |
55 |
1:1 |
4000 |
70 |
|
BMT-65 Radial PTI‐6 [C6] |
70 x 73 |
C6 |
55 |
95 |
92 |
83 |
112 |
50 |
55 |
1:1 |
3000 |
100 |
|
BMT-75 Radial PTI‐6 [C4] |
90 x 90 |
C4 |
55 |
95 |
92 |
80 |
110 |
50 |
55 |
1:1 |
5000 |
40 |
|
BMT-75 Radial PTI‐6 [C5] |
90 x 90 |
C5 |
55 |
95 |
92 |
80 |
110 |
50 |
55 |
1:1 |
4000 |
70 |
|
BMT-75 Radial PTI‐6 [C6] |
90 x 90 |
C6 |
55 |
95 |
92 |
80 |
110 |
50 |
55 |
1:1 |
3000 |
100 |
¨ BMT Turret Radial (90◦ Degrees) Driven (Live) ER Tool Holders:
¨ BMT Turret Radial (90◦ Degrees) Driven (Live) ER Tool Holders: [DIN 1809]
|
Model [ Description ] Live |
Collet Range |
Bolt Pattern [A X B] mm |
C |
D |
E |
[G X H] mm |
CH |
H1 |
|
BMT-45 Radial ER-20 |
3-13 |
58 x 58 |
60 |
84 |
6 |
75 x 75 |
65 |
95 |
|
BMT-45 Radial ER-25 |
3-16 |
58 x 58 |
60 |
84 |
6 |
75 x 75 |
65 |
95 |
|
BMT-55 Radial ER-25 |
3-16 |
64 x 64 |
75 |
104 |
8 |
85 x 85 |
60 |
94 |
|
BMT-55 Radial ER-25 |
3-16 |
64 x 64 |
75 |
104 |
8 |
85 x 85 |
70 |
104 |
|
BMT-55 Radial ER-32 |
3-20 |
64 x 64 |
75 |
104 |
8 |
85 x 85 |
70 |
104 |
|
BMT-55 Radial ER-25 |
3-16 |
64 x 64 |
75 |
104 |
8 |
85 x 85 |
85 |
119 |
|
BMT-55 Radial ER-32 |
3-20 |
64 x 64 |
75 |
104 |
8 |
85 x 85 |
85 |
119 |
|
BMT-55 Radial ER-25 |
3-16 |
64 x 64 |
75 |
104 |
8 |
85 x 85 |
60 |
94 |
|
BMT-55 Radial ER-25 |
3-16 |
64 x 64 |
75 |
104 |
8 |
85 x 85 |
70 |
104 |
|
BMT-55 Radial ER-32 |
3-20 |
64 x 64 |
75 |
104 |
8 |
85 x 85 |
70 |
104 |
|
BMT-55 Radial ER-25 |
3-16 |
64 x 64 |
75 |
104 |
8 |
85 x 85 |
85 |
119 |
|
BMT-55 Radial ER-32 |
3-20 |
64 x 64 |
75 |
104 |
8 |
85 x 85 |
85 |
119 |
|
BMT-65 Radial ER-32 |
3-20 |
70 x 73 |
83 |
112 |
10 |
94 x 94 |
72 |
110 |
|
BMT-65 Radial ER-32 |
3-20 |
70 x 73 |
83 |
112 |
10 |
94 x 94 |
100 |
138 |
|
BMT-65 Radial ER-40 |
3-30 |
70 x 73 |
83 |
112 |
10 |
94 x 94 |
100 |
143 |
|
BMT-65 Radial ER-32 |
3-20 |
70 x 73 |
83 |
112 |
10 |
94 x 94 |
72 |
110 |
|
BMT-65 Radial ER-32 |
3-20 |
70 x 73 |
83 |
112 |
10 |
94 x 94 |
100 |
138 |
|
BMT-75 Radial ER-32 |
3-20 |
90 x 90 |
80 |
110 |
14 |
112 x 112 |
60 |
105 |
|
BMT-75 Radial ER-40 |
3-30 |
90 x 90 |
80 |
110 |
14 |
112 x 112 |
110 |
155 |
|
BMT-85 Radial ER-50 |
10-34 |
100 x 100 |
100 |
140 |
16 |
125 x 125 |
85 |
137 |
|
Model [ Description ] Live |
L1 |
L2 |
Ød BMT |
Ød1 |
Nmax RPM |
S [ER] |
T Nm |
I [Ratio] |
NUT |
|
BMT-45 Radial ER-20 |
63 |
51.5 |
45 |
14 |
8000 |
ER20 |
25 |
1:1 |
INT |
|
BMT-45 Radial ER-25 |
85 |
51.5 |
45 |
14 |
8000 |
ER25 |
25 |
1:1 |
EXT |
|
BMT-55 Radial ER-25 |
100 |
52.5 |
55 |
15 |
6000 |
ER25 |
40 |
1:1 |
EXT |
|
BMT-55 Radial ER-25 |
100 |
52.5 |
55 |
15 |
6000 |
ER25 |
40 |
1:1 |
EXT |
|
BMT-55 Radial ER-32 |
101 |
52.5 |
55 |
15 |
6000 |
ER32 |
40 |
1:1 |
EXT |
|
BMT-55 Radial ER-25 |
100 |
52.5 |
55 |
15 |
6000 |
ER25 |
40 |
1:1 |
EXT |
|
BMT-55 Radial ER-32 |
101 |
52.5 |
55 |
15 |
6000 |
ER32 |
40 |
1:1 |
EXT |
|
BMT-55 Radial ER-25 |
76 |
52.5 |
55 |
15 |
6000 |
ER25 |
40 |
1:1 |
INT |
|
BMT-55 Radial ER-25 |
76 |
52.5 |
55 |
15 |
6000 |
ER25 |
40 |
1:1 |
INT |
|
BMT-55 Radial ER-32 |
78 |
52.5 |
55 |
15 |
6000 |
ER32 |
40 |
1:1 |
INT |
|
BMT-55 Radial ER-25 |
76 |
52.5 |
55 |
15 |
6000 |
ER25 |
40 |
1:1 |
INT |
|
BMT-55 Radial ER-32 |
78 |
52.5 |
55 |
15 |
6000 |
ER32 |
40 |
1:1 |
INT |
|
BMT-65 Radial ER-32 |
96 |
57.5 |
65 |
18 |
6000 |
ER32 |
70 |
1:1 |
EXT |
|
BMT-65 Radial ER-32 |
96 |
57.5 |
65 |
18 |
6000 |
ER32 |
70 |
1:1 |
EXT |
|
BMT-65 Radial ER-40 |
115 |
74 |
65 |
18 |
5000 |
ER40 |
70 |
1:1 |
EXT |
|
BMT-65 Radial ER-32 |
83.5 |
59 |
65 |
18 |
6000 |
ER32 |
70 |
1:1 |
INT |
|
BMT-65 Radial ER-32 |
83.5 |
59 |
65 |
18 |
6000 |
ER32 |
70 |
1:1 |
INT |
|
BMT-75 Radial ER-32 |
105.5 |
64 |
75 |
23 |
4000 |
ER32 |
100 |
1:1 |
EXT |
|
BMT-75 Radial ER-40 |
105.5 |
64 |
75 |
23 |
4000 |
ER40 |
100 |
1:1 |
EXT |
|
BMT-85 Radial ER-50 |
129 |
70.5 |
85 |
33.5 |
4000 |
ER50 |
210 |
1:1 |
EXT |
"BMT
driven tool holders can be manufactured according to customer-provided
drawings."
¨ BMT Turret Radial (90◦ Degrees) Driven (Live) QA Tool Holders:
¨
“Live Tooling is provided upon request at a specified ratio.”
|
RATIO
EXAMPLE |
in RPM |
out RPM |
|
1:1 |
6000 |
6000 |
|
1:2 |
6000 |
12000 |
|
1:3 |
5000 |
15000 |
|
2:1 |
6000 |
3000 |
📌 Important
Ordering Note – Live Tooling
v Availability: Live Tooling is supplied only
upon request.
v Specification: Orders must specify the required
ratio along with all relevant technical parameters.
v Lead Time: Additional processing time may
be required; please confirm delivery schedules in advance.
v Customization: Any variation from standard
ratios must receive prior approval before order confirmation.
v Responsibility: Incomplete or unclear order
details may result in delays.
v Production: Manufacturing will commence only
after receipt of advance payment and final drawing approval.
v Order Requirement: Customers must provide Turret
technical details (Drive/Coupling specifications) to finalize product
design.
TOOLS AND APPLIANCES CORPORATION
BLOCK NO.: 135/2, BILESHWARPURA, P.O. CHHATRAL - 382729,
TA. KALOL ( N.G.), DIST. GANDHINAGAR.
MO. 6355213404, 6355251586,
Email :- taco@imitoolsindia.com, salestaco@imitoolsindia.com.
