This Gearbox powered Linear actuator is the new and improved version of my old design. This one higher torque than old one. If you want you can put the Servo Motor on the system and it would be 3D printed high torque servo/gearbox version. I also make a press, garden door or lifting table,... using this gearbox Powered Linear Actuator . The Gearbox has a gear ratio of 6:1 and the speed of the output shaft was about 2150 RPM which lowers the speed and increases the high torque. I choose to go for helical gears on this one because they produce a lot less noice than regular spur gears and the forces on the teeth are transferred more gradually. The middle gear (pink one) rotate around a 6mm stainless steel shaft which is lubricated with bearing grease. Ideally all the gears should have some bearings, this is being considered for the next moment.
The Gearbox uses a 775 12V 13000rpm brushed DC-motor powered by car battery and I got a cool results. The stall torque theoretically is about 0.5 Nm. So the maximum axial load theoritically 250 Newton. But if you use a 150-watt 775 motor, this time the axial load will theoretically be 380 Newtons. The Piston stroke is maximum 120 mm and piston speed about 30 mm/s. So 4 sec to required for full stroke. The thread rod is 8 mm diameter. (M8) During testing none of the gears broke, they were all printed in PLA. The weak link in this design however where the mounting tabs and the pinion gear used in the first stage on the motor shaft.


Plastic (PLA+) parts 3D Print and you can download from here:
STL Files ► https://www.thingiverse.com/thing:474...

(The body does not need to be so strong. Because the body only meets the friction force between the lead screw and the nut.)

Editable Fusion 360 source files can be found here: ► https://www.cgtrader.com/3d-print-mod...

Part list
775 motor-100W (You can use 150 watt) ► https://www.banggood.com/Machifit-775...

3-position rocker switch ► https://www.banggood.com/10pcs-250V-A...

M8 thread rod

M6 shaft608zz bearing x3 ►https://www.banggood.com/10pcs-ABEC-7...



M3x40 screw—x4

M3X15 screw --- x12

M3 washers --- x16

M3 nuts ---- x16

M4x10 ---x2 (for motor mounting)

External Retaining Ring (M8) x 2

External Retaining Ring (M6) x 2

Cotter pin (M2)
- - - - - - - - - -
Music credit:
"Royalty Free Music from Bensound"
Music credit:
Mysterious Space Music
Gravity Sound - Portal
Written and produced by Gravity Sound.
- - - - - - - - - -