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The titanium spinner / carabiner: An idea so simple, so elegant and well executed... you'll wonder why you don't have one already.
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Project Update #4: Major Machining Completed...

Posted by Jack Roman and Louis Krudo (Creator)
3 likes

Looks like we're getting there people. The major milling and turning operations are now complete and the spinner bodies & buttons have been machined. In other words, we're looking good here:

Titanium AXIOS Spinners
Titanium AXIOS Spinners

 

Brass AXIOS Spinners
Brass AXIOS Spinners

Now comes the interesting part; most spinners I've seen are either press fit or use a set screw to hold the bearing in place. Press fit bearings are nice but not always easy to install or remove. Set screw work well but can deform the bearing race if tightened down too far and they can also just come loose over time. I had another idea I wanted to try: using a groove machined into the center bore into which we would press an o-ring. This o-ring then would protrude ever-so-slightly into the bore and hold the bearing over the entire outer bearing surface. 

O-Ring Groove
O-Ring Groove

 

O-ring Groove with O-ring in it.
O-ring Groove with O-ring in it.

This should allow us to slip fit the bearing into place without any wobble and without any tools. By holding the bearing along the entire OD it should also not deform the outer bearing race. 

I'm re-machining the spinner bodies (just finished the brass bodies) and other than a small burr left over from the keyseat cutter (which I remove by hand), it works! 

I'm waiting on a solid carbide keyseat cutter (the high-speed steel probably won't work on the titanium spinner bodies) right now and will finish the titanium bodies next week. Then it's just a matter of finishing and assembling the spinners and we should be done. 

Stay tuned for more...

-jack

Dave Stott, Pete Murphy, and 1 more person like this update.

Comments

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    1. Jack Roman Collaborator on

      Geoff, I did but I think this is a better solution. It requires no tools at all and holds the bearing (and accompanying button) in place. A snap ring would have still have required tools.

    2. Geoff Heath on

      Did you consider a snap ring and groove to keep the bearing in ? Think like a universal joint on a driveshaft, the same thing to keep the bearing caps on.