Video can be found here: https://www.youtube.com/watch?v=99aw_77oUvY

STL and Editable Fusion 360 source files can be found here: https://bbprojects.technology/collections/stl-fusion-360-source-files/products/3d-printable-linear-actuator-files

This linear actuator is almost completely 3D printed (except for the thread and some bolts, nuts and bearings).I curently don't have any position feedback or limited switches installed on it, I will add them in the feature when I'm going to integrate it in a projecct. It has a speed of about 25 mm/s on a 9V battery and draws about 1.7 Amps of curent. The motor is rated for 36 Volts. Running the linear actuator on a 36 Volt battery will increase the speed of the actuator. The transmission is a belt driven one wich uses a GT2 timing belt and a 3D printed GT2 pulley, This may not be the most ideal transmission for this task but it'll do for some testing. The linear actuator uses an M8 thread to convert the rotating motion into a linear motion. All parts (except for the 120 teeth pulley) are printed with a 1 mm nozle because there is no high accuracy required and it goes a lot faster. Some people are sceptic about using a 1mm nozzle but I think it's good for printing large objects like these without the need for accuracy. And it works great for me.

Video can be found here: https://www.youtube.com/watch?v=99aw_77oUvY

More info can be found here: https://hackaday.io/project/52706-3d-printable-linear-actuator

Components used:

1 × l298N motor driver
link: https://www.banggood.com/Wholesale-Dual-H-Bridge-DC-Stepper-Motor-Drive-Controller-Board-Module-Arduino-L298N-p-42826.html?p=E01411629100201406T1&custlinkid=255131

1 × Arduino nano V3
link: https://www.banggood.com/Geekcreit-ATmega328P-Nano-V3-Module-Improved-Version-With-USB-Cable-Development-Board-For-Arduino-p-933647.html?p=E01411629100201406T1&custlinkid=255135

1 × 775 electric motor 36 Volt
link: https://www.banggood.com/775-Gear-Motor-DC-12V-36V-3500-9000RPM-Motor-Large-Torque-High-power-Motor-p-1091058.html?rmmds=search&cur_warehouse=CN

1 × Pulley for motor side, 5mm bore, 16 teeth
link: https://www.banggood.com/162036T-GT2-Aluminum-Timing-Pulley-For-DIY-3D-Printer-p-1001266.html?p=E01411629100201406T1&custlinkid=669283

2 × 8mm inner diameter bearings
link: https://www.banggood.com/10pcs-8x19x6mm-Steel-Sealed-Shielded-Deep-Groove-Ball-Bearings-698ZZ-p-980204.html?rmmds=search&cur_warehouse=CN

1 × Gt2 timing belt 260-GT2-6
https://www.robotdigg.com/product/283/260mm-264mm-268mm-280mm-288mm-or-294mm-gt2-endless-belt

1 × M8 thread rod

7 × M8 nuts

Recommended tools:

3D-printer: https://www.banggood.com/Creality-3D-Ender-3-Pro-V-slot-Prusa-I3-DIY-3D-Printer-Kit-p-1346320.html?p=E01411629100201406T1&custlinkid=677427

Paypal: https://paypal.me/BrockenBrian

Feel free to take a look at my other designs:

3D printable antweight battlebot: Bulldog: https://www.thingiverse.com/thing:4623536
SpaceX inspired edf rocket: https://www.thingiverse.com/thing:4606751
3D printed high torque servo/gearbox version 2: https://www.thingiverse.com/thing:4547703
UMC - Universal motion controller: https://www.thingiverse.com/thing:4245315
3D-printable Davinci catapult gift card: https://www.thingiverse.com/thing:4067668
Arduino controlled photogrammetry 3D-scanner: https://www.thingiverse.com/thing:3958326
Fully 3D-printable turntable: https://www.thingiverse.com/thing:3723618
RC FPV tank rover: https://www.thingiverse.com/thing:3587738
Fully 3D-printable wind-up car gift card: https://www.thingiverse.com/thing:3308710
3D-printable High torque servo/gear reduction: https://www.thingiverse.com/thing:3292860
'BOOM box' high voltage capacitor bank case: https://www.thingiverse.com/thing:2980012
Subby the interactive youtube subscriber robot: https://www.thingiverse.com/thing:2928254
robot hand || bionic hand prosthesis prototype: https://www.thingiverse.com/thing:2838239
3D-printable linear actuator: https://www.thingiverse.com/thing:2783959
Mini 3D-printable crossbow: https://www.thingiverse.com/thing:2710472
8 legged spider robot: https://www.thingiverse.com/thing:2470882
best 3D-printable bearing: https://www.thingiverse.com/thing:2349065

Have a nice day!