Hario Skerton Grinder Spacer Bearing

by arnaudin, published

Hario Skerton Grinder Spacer Bearing by arnaudin Aug 26, 2015
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1581Views 319Downloads Found in Kitchen & Dining


My Hario Skerton grinder got wobbly after a bit of use due to the single plastic point of contact for the shaft, so I designed this bearing to hold the shaft in place.

This is a symmetric piece -- you will need to print two. Then take the grinder apart and insert them around the shaft.


I measured the grinder using calipers, then modeled this part in Fusion 360. The F3D file is attached if you would like to modify the source.

Unscrew the grinder and remove the ceramic bits & shaft. Place the two printed parts around the smooth part of the shaft and hold in place. Insert back into the grinder body, aligning the five ribs with those in the grinder body.

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...and the reason it's in two pieces instead of one solid piece is...?

The threads on the grinder shaft are a wider diameter than the smooth section where this part sits. If the inner diameter of this part was wide enough to fit over the threads it would not be able to serve its intended purpose of holding the shaft steady. Having the part split into two pieces allows it to mate flush against the smooth section of the shaft. Hope this helps!

I made mines one-piece with threads. Once you screw the rod pass the threads in the object, it glides over the smooth shaft real good. I also raised the height of that fully threaded section and that helped a lot with making any shaft looseness/play nice and tight.

https://tinkercad.com/things/ezunjkeuukW to check out my design.


Cool! I wasn't sure how threads would print, but yeah, that is totally a viable option as well. Thanks for sharing :)

@janrm I modeled it in inches, so that may be the issue if your slicer is expecting mm or something else. I measured the Fusion part and the height of the cylinder should be 0.469 in, with an inner diameter of 0.29 in. Hope this helps! The part is still in my grinder after almost a year!

That does make sense, mine is expecting mm! Will give it another shot with manual units set up and post a pic once I'm done. Thanks!

hi, for some reason this comes out so small my slicer doesn't even properly recognise it as an object. What are the dimensions supposed to be?
Would love to give it a go!