2017
Bondtech introduced the BMG (Bondtech Mini Geared) extruder, featuring mini dual drive gears and a 3:1 gearing ratio, enhancing torque and push force compatibility with any Nema17 motor.
The BMG’s compact, reliable, and precise design, along with its versatility to accommodate bowden setups and interface with various hotends and printers, solidified its status as a pioneering solution, often imitated but never surpassed.
Bondtech’s precise and reliable mini dual drive gears turned 3D printing even more accessible and desirable.
Original Dual Drive Technology
2nd generation of the world leading extruder technology Bondtech brought to market.
A great invention made mini
A new and miniaturized Dual Drive Technology to allow smaller form factor extruders.
Small yet precise and reliable
Released with the BMG, this Dual Drive Tech enabled the Creator's revolution.
Leading for long, copied by all
Currently the most pervasive and common filament feeding technology.
Find this tech in these products
Thank you so much. You have been very helpful.
I retired after 25 plus years in quality assurance and I give your customer service an A++.
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Drive Gears
⌀ 8.0mm
hardened steel
⌀ 8.0mm
hardened steel
⌀ 8.0mm
hardened steel
⌀ 8.0mm
hardened steel
Pre-tension
Quick Release
hinge
Quick Release
hinge
Quick Release
hinge
Quick Release
hinge
Filament ⌀
1.75 mm
1.75 mm
1.75 mm
1.75 mm
Hotend Mount
Groove
mount
Mosquito
mount
Adapter
mount
no
hotend mount
Extruder (Motor Weight)
99g
99g
99 g
(280g)
99g
Working Temperature
From 20° C
to 80° C
From 20° C
to 80° C
From 20° C
to 80° C
From 20° C
to 80° C
Target Markets
Home
Maker
Professional
Industrial
Home
Maker
Professional
Industrial
Home
Maker
Professional
Industrial
Home
Maker
Professional
Industrial
Usage Level
low
moderate
high
intensive
low
moderate
high
intensive
low
moderate
high
intensive
low
moderate
high
intensive
Printer Form Factor
as bowden extruder
light/small
medium
heavy/big
light/small
medium
heavy/big
Printer Form Factor
as direct extruder
light/small
medium
heavy/big
light/small
medium
heavy/big
light/small
medium
heavy/big
Motor included?
BMG Standard
extruder
BMG Mirrored
extruder
SKU
EXT-BMG
EXT-BMG-LH
EAN
???
???
e-steps
415
[ 1.8° @ 16bit]
415
[ 1.8° @ 16bit]
rotation_distance
7.71
7.71
Filament ⌀
1.75 mm
1.75 mm
Gearing ratio
3:1
3:1
Max Working Temperature
From 20° C
to 80° C
From 20° C
to 80° C
Push Force
10Kg+
10Kg+
Motor features
Nema17
standard 5 mm shaft
motor not included
Nema17
standard 5 mm shaft
motor not included
For bowden?
For direct?
BMG-M Standard
extruder
BMG-M Mirrored
extruder
SKU
EXT-BMG-M
EXT-BMG-M-LH
EAN
7350011410309
7350011410347
e-steps
415
[ 1.8° @ 16bit]
415
[ 1.8° @ 16bit]
rotation_distance
7.71
7.71
Filament ⌀
1.75 mm
1.75 mm
Gearing ratio
3:1
3:1
Max Working Temperature
From 20° C
to 80° C
From 20° C
to 80° C
Push Force
10Kg+
10Kg+
Motor features
Nema17
standard 5 mm shaft
motor not included
Nema17
standard 5 mm shaft
motor not included
For bowden?
For direct?
SKU
EXT-KIT-77
EXT-KIT-77-V2
EXT-KIT-77-V3
EAN
???
???
7350011414079
Status
deprecated
deprecated
current
e-steps
415
[ 1.8° @ 16bit]
415
[ 1.8° @ 16bit]
415
[ 1.8° @ 16bit]
rotation_distance
7.71
7.71
7.71
Filament ⌀
1.75 mm
1.75 mm
1.75 mm
Gearing ratio
3:1
3:1
3:1
Part cooling Mount
Side groove
Side groove
Side slot
Max Working Temperature
From 20° C
to 80° C
From 20° C
to 80° C
From 20° C
to 80° C
Design features
Original Design
for Ender-3, CR-10
and Ender-5 series
Additional Mounting points
Ender-6 carrier plate compatible
Additional top mounting point
new cooling mount
easier mounting procedure
Push Force
10Kg+
10Kg+
10Kg+
Motor features
Nema17 25mm
standard 5 mm shaft
motor included
Nema17 25mm
standard 5 mm shaft
motor included
Nema17 25mm
standard 5 mm shaft
motor included
Ender-6 compatible
For bowden?
For direct?
V2 1.75
V2 2.85
SKU
EXT-KIT-10
EXT-KIT-11
EAN
7350011410446
7350011410453
e-steps
476.5
[ 1.8° @ 16bit]
492.45
[ 1.8° @ 16bit]
rotation_distance
6.1756
6.498
Filament ⌀
1.75 mm
2.85 mm
Gearing ratio
5:1
5:1
Max Working Temperature
From 20° C
to 80° C
From 20° C
to 80° C
Push Force
10Kg+
10Kg+
Motor features
XXXXX
XXXXX
For bowden?
For direct?
Learn about other Bondtech technologies
DUAL DRIVE TECHNOLOGY
( GEN1 )
More precision, less filament slipping, tearing and shredding:
Better parts.
PRE-TENSION
QUICK RELEASE
No need for tools, just two fingers to setup or release:
Easier to use.
MINI DUAL DRIVE TECHNOLOGY
( GEN2 )
Smaller drive gears; great grip & control; room for a gearbox:
Less extruder weight.
PRE-TENSION
LEVER
CAM mechanism that adjusts the distance between drive gears:
More repeatability.
INtegrated Drive Gear Assembly
( IDGA )
Monolithic construction; less run-out:
Better print surface quality.
LARGE DUAL DRIVE TECHNOLOGY
( GEN3 )
Largest drive gears; leading grip & control:
Less failed prints and better surface quality.
SHORT FILAMENT PATH
TOOLHEADS
Our solution to print faster with rigid and flexible materials:
More flow and less spring effect.
CORE HEATING TECHNOLOGY
( CHT )
3-ways filament spliter; triple the heat surface contact:
Faster prints and stronger parts.
LGX FULL STEEL
DRIVE TRAIN
Steel gears and drive wheels; metal sliding bearings:
Raise application limits higher.
BI-METAL CHT
( Core Heating Technology )
Updated CHT nozzles with Copper bodies and Steel inserts:
High flow comes to abrasive materials.