Customizable Linear Actuator

The parts to produce a custom length DC motor driven linear actuator. Based on a 2020 extrusion the length can be adjusted to any length you need.

Designed around a T8 lead screw and brass nut. Lenth of the lead screw is the only limiting factor.

Parts required:

37mm gear motor. I used this one:
https://a.co/d/ehEINPq

T8 Lead screw
2020 exterusion
M5x8mm Button head cap screws
M5 2020 captive nuts
M8 Stop Collars - https://a.co/d/ezE3Lgs
608 bearing
M5xM8 Shaft coupler
Limit Switch -  https://a.co/d/8P6fbxc
4 conductor wire (6 if you need two limit switches.
Misc small screws for motor, limit switch and lead screw nut.

Parts printed as oriented. Use the strength settings you require. I used 4 perimeters, 5 top and bottom layers and 30% infill. Print from material of your choice to match environment it is being used in.
 

Assembly:

Press a bearing into the Bottom Bracket

Insert captive nuts into end of 2020 extrusion one on each side. Place bottom bracket over 2020 extrusion with bearing facing towards the opposite end of the 2020 and secure with M5 bolts.

Secure lead nut into the slide with 4 screws

Install motor into Motor Mount with appropriate screws. 

Install shaft coupler to motor.

Insert captive nuts into other end of 2020 and secure Motor Mount to the 2020 with M5 bolts

Push T8 lead screw through bottom bracket. place a shaft collar on it. Thread the slide onto the lead screw. Pust the lead screw into the shaft collar and secure with set screws.

Pus the shaft collar down to touch the bearing in the bottom bracket and secure with set screw. The purpose of this collar is to take the linear load off the shaft collar.

Wire by running 2 wires up in the bottom slot of the 2020 to the motor.

The limit switches are installed on the bracket with the lever facing along the 2020 extrusion. Wires can be routed into the bottom slot of the 2020.