Q-Ball 3D printed ball cage

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Guts
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Re: Q-Ball 3D printed ball cage

#21

Post by Guts »

Josh Crutchley wrote:
Mon Jun 23, 2025 10:14 pm
Guts wrote:
Mon Jun 23, 2025 9:11 am
After getting the recent Dodo exclusive, I've been thinking of designing something similar, but I see it's already been done. Thanks for sharing the link, might have to print one out later and try it.
The dodo is slightly different so let me know how it works out.
Tried it out last night. So the ball fits fine in the cage and the cage itself fits fine in the body of the Dodo, however the OD of the stem part is way too thick for the spring on the Dodo and the opening on the back of the cage where the tang contacts the ball is a tiny bit too narrow. Do you happen to have a step file for it? I was going to try and modify it a bit to see if I could get it to work.

I'd never tried a ball bearing lock until I got the Dodo, but I can see why they moved to the caged ball bearing after messing around with the Dodo so I'd love to get this mod working.
:bug-red-white :bug-red :bug-white-red
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Josh Crutchley
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Re: Q-Ball 3D printed ball cage

#22

Post by Josh Crutchley »

Guts wrote:
Tue Jun 24, 2025 9:47 am

Tried it out last night. So the ball fits fine in the cage and the cage itself fits fine in the body of the Dodo, however the OD of the stem part is way too thick for the spring on the Dodo and the opening on the back of the cage where the tang contacts the ball is a tiny bit too narrow. Do you happen to have a step file for it? I was going to try and modify it a bit to see if I could get it to work.

I'd never tried a ball bearing lock until I got the Dodo, but I can see why they moved to the caged ball bearing after messing around with the Dodo so I'd love to get this mod working.
Added the step file to thingiverse for you.
Guts
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Re: Q-Ball 3D printed ball cage

#23

Post by Guts »

Josh Crutchley wrote:
Tue Jun 24, 2025 11:13 am
Guts wrote:
Tue Jun 24, 2025 9:47 am

Tried it out last night. So the ball fits fine in the cage and the cage itself fits fine in the body of the Dodo, however the OD of the stem part is way too thick for the spring on the Dodo and the opening on the back of the cage where the tang contacts the ball is a tiny bit too narrow. Do you happen to have a step file for it? I was going to try and modify it a bit to see if I could get it to work.

I'd never tried a ball bearing lock until I got the Dodo, but I can see why they moved to the caged ball bearing after messing around with the Dodo so I'd love to get this mod working.
Added the step file to thingiverse for you.
Appreciate it! I'll see if I can modify it to get it to fit better tonight.
:bug-red-white :bug-red :bug-white-red
Guts
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Posts: 519
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Location: Pacific Northwest

Re: Q-Ball 3D printed ball cage

#24

Post by Guts »

Josh Crutchley wrote:
Tue Jun 24, 2025 11:13 am
Guts wrote:
Tue Jun 24, 2025 9:47 am

Tried it out last night. So the ball fits fine in the cage and the cage itself fits fine in the body of the Dodo, however the OD of the stem part is way too thick for the spring on the Dodo and the opening on the back of the cage where the tang contacts the ball is a tiny bit too narrow. Do you happen to have a step file for it? I was going to try and modify it a bit to see if I could get it to work.

I'd never tried a ball bearing lock until I got the Dodo, but I can see why they moved to the caged ball bearing after messing around with the Dodo so I'd love to get this mod working.
Added the step file to thingiverse for you.
Got it working. Went through a few iterations to get the fit just right and ended up having to take a bit of material off the front facing surface as it was rubbing on the inside of the scales too much and the cage assembly would get stuck basically. Made the stem the same length and diameter as on the steel plunger from the factory. Also had to remove a bit of material on the small "bridge" part on the top that connects the two halves above where the ball sits. The tang of the blade was contacting that when the blade was closed preventing the ball from being pushed up far enough to lock the blade fully.

I think I might just remove that bridge completely as I did so on a test piece and it's been working fine. Don't see any downside to doing so since the presence of the ball will keep it from collapsing anyway. At any rate, thanks again for posting that step file. Made it much easier to modify and now the Dodo works just like a Manix for me.

Printed in polycarbonate so we'll see how it holds up.
Image
Image
Image
fresh off the printer
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vs. the original q-ball version
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:bug-red-white :bug-red :bug-white-red
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Josh Crutchley
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Re: Q-Ball 3D printed ball cage

#25

Post by Josh Crutchley »

Guts wrote:
Tue Jun 24, 2025 3:27 pm


Got it working. Went through a few iterations to get the fit just right and ended up having to take a bit of material off the front facing surface as it was rubbing on the inside of the scales too much and the cage assembly would get stuck basically. Made the stem the same length and diameter as on the steel plunger from the factory. Also had to remove a bit of material on the small "bridge" part on the top that connects the two halves above where the ball sits. The tang of the blade was contacting that when the blade was closed preventing the ball from being pushed up far enough to lock the blade fully.

I think I might just remove that bridge completely as I did so on a test piece and it's been working fine. Don't see any downside to doing so since the presence of the ball will keep it from collapsing anyway. At any rate, thanks again for posting that step file. Made it much easier to modify and now the Dodo works just like a Manix for me.

Printed in polycarbonate so we'll see how it holds up.
That's awesome! I had a few fail without the bridge when using a resin printer and cheap resin. Polycarbonate should hold up better.
Red Leader
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Re: Q-Ball 3D printed ball cage

#26

Post by Red Leader »

Josh Crutchley wrote:
Mon Jun 23, 2025 10:14 pm


Thanks. It's actually printed from nylon. I'm planning on trying Sculpteos cast brass for the next one.
Cool! Regarding the cast brass, is there shrinkage in the casting/cooling process that has to then be accounted for?
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