Yet another low-cost leadscrew coupling
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Published on June 15, 2011
Description
Coupling to connect M8 threaded rod leadscrew to 5mm stepper motor shaft.
(It seems Thingiverse lost the list of materials)
List of materials:
- 1-2cm of flexible tubing e.g. 4x6 or 4x7mm
- M8 coupling nut
- M8 nut for contra
(It seems Thingiverse lost the list of materials)
List of materials:
- 1-2cm of flexible tubing e.g. 4x6 or 4x7mm
- M8 coupling nut
- M8 nut for contra
Instructions
* slide the tubing on 5mm motor shaft
* thread one nut (or better yet, a coupling nut) onto the top of the tubing so that half of the nut is above the shaft
* thread another nut onto the threaded rod
* screw the rod onto the nut on the motor
* tighten the rod against motor shaft (but not too tight)
* tighten the nuts against each other
I used coupling nut on the picture for better grip, but it seems to work with regular nut as well.
I don't see a reason why this shouldn't work for 5/16" threaded rod as well.
* thread one nut (or better yet, a coupling nut) onto the top of the tubing so that half of the nut is above the shaft
* thread another nut onto the threaded rod
* screw the rod onto the nut on the motor
* tighten the rod against motor shaft (but not too tight)
* tighten the nuts against each other
I used coupling nut on the picture for better grip, but it seems to work with regular nut as well.
I don't see a reason why this shouldn't work for 5/16" threaded rod as well.
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TJSav
on
January 15, 2013
said:
What type of tubing did you use in your coupler? The two I bought just bind up and tear when I try to thread the nut on.
thebaron88
on
April 26, 2012
said:
Damn that's good. I looked at it and it looked a bit flimsy, but trying it its really good.
I attached the coupling and the nut to the rod, used pliers to hold the motor shaft, and screwed the two halves together.
Miro87043
on
January 15, 2012
said:
This is great! I printed a few different z couplings, but I could never completely get rid of z axis wobble until I tried your solution.
Thanks for sharing!
ParallelPilgrim
on
September 12, 2011
said:
I used a lock washer to keep the coupling nut and hex nut together so the the threaded rod didnt accidentally get unscrewed.
License
Yet another low-cost leadscrew coupling by keegi is licensed under the Attribution - Share Alike - Creative Commons license.
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This is so much smaller than the OEM coupler found in Prusa Mendels. I could gain a couple centimeters of x motion at z=10cm. Very cool. :-)