28BYJ-48 Stepper Linear Actuator with Printed Ball Screw
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Pocket-sized linear slide driven by a 28BYJ-48 5 V stepper: printed rail, recirculating 4.5 mm BB linear bearing, printed lead screw and thrust bearing, Arduino + ULN2003 control with endstop homing; refurbished remix of the CC BY Linear Ball Bearing Stepper Slide v2 by 3DPRINTINGWORLD.
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# 28BYJ-48 Stepper Linear Actuator with Printed Ball Screw
A pocket-sized motion axis you can print in an evening. The slide uses the cheap 28BYJ-48 5 V stepper that comes with most Arduino kits, a printed rail with a recirculating linear bearing running on ordinary 4.5 mm (.177) steel BBs, and a printed lead screw with its own BB thrust bearing. Two lead screws are included: a twin-start screw for force (the original author moved over 25 lb / 11 kg with it) and a quad-start screw for speed. Mounting holes on the base, carriage and end plate line up, so several slides can be bolted together into a two- or three-axis stage.
Add a microswitch endstop and the Arduino sketch in the guide, and you have a homing linear axis for pushers, small camera sliders, syringe drives and motion-control experiments.
What you get in the download:
- the 11 print files (rail, carriage, end caps, nuts, both lead screws, thrust-bearing flange and caps),
- a Build Guide PDF: Arduino and ULN2003 setup first, then printing, bearing packing, assembly, wiring, homing and calibration,
- a Bill of Material PDF with every purchased part and a shop link per row.
Parts cost is about 10 to 15 USD plus filament.
This is a remix of the Linear Ball Bearing Stepper Slide v2 by 3DPRINTINGWORLD on Thingiverse, updated and refurbished for modern use with an Arduino build path, endstop homing, a current-parts Bill of Material and a rewritten English build guide.