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Tri Fidget Spinner With 3 M8 Nuts

by MisterFresh, published

Tri Fidget Spinner With 3 M8 Nuts by MisterFresh Feb 4, 2017
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Visit http://fidgetexpert.com for more projects and guides. :)

A tri fidget spinner I made in 123D Design. Uses one skateboard bearing together with three hex M8 nuts.

!READ THIS!
Right from the bat the sockets for the hex nuts are a little bit too small, so use a lighter to heat them up, then push the nuts through for a perfect tight fit. This will ensure they will not fly out of their sockets.

I recommend that you print a cap for the ball bearing as well.

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May 10, 2017 - Modified May 10, 2017

With all these complaints... would it be better for people to use the JIS M8 (Japanese automotive standard) nuts? JIS (vs DIN/ISO spec dimensions) is about 0.7-1.0mm smaller in the diameter... I encountered this issue when I printed another M8 spinner and my M8s slipped right through... which caused me to research the difference between JIS and DIN metric hardware.

Here's a small document that compares JIS against DIN dimensions:
http://davcofastener.com/wp-content/uploads/2014/12/JIS-vs-DIN-Hex-Nut.pdf

This spinner is not a m8 nut. false dimension.

May 1, 2017 - Modified May 1, 2017

Love the design as its small and cheap to make.. But its a little too thick at 8mm.. It should be 7mm surely (I can easily correct that in print).

But for me, the M8 hex holes are too tight.. I printed it at 101% and the bearing is a nice fit.. But the hex's are still too tight. Even after heating them, there is no way they will go in.

Any chance you could tweek it a little?

Edit: I have opened the STL in Sketchup and increased the size of the hex by 0.5mm.. And now it prints great and both the bearings and nuts fit perfectly.

May 12, 2017 - Modified May 12, 2017
roja75 - in reply to jweaver

Any chance to put your version on thingiverse?

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