geoffrey-young/pika-filament-buffer

buffer-bearing-insert.stl - end snaps off

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Hello! This looks amazing - printing the parts now!

I've had the exact same problems as you described - accessing the wheel on the other buffer solutions leads to so much frustration and shouting, my wife wants to yeet the whole thing out the window.

I've got the first buffer set up, but keep having the end of the buffer-bearing-insert.stl snapping off, which means the wheel comes off the axle, leading to all sorts of misery. Is this a common problem / is there a solution? I'm thinking of maybe trying replacing the axle with an M5 screw (with a printed spacer, so the wheel fits snugly around it and a washer to avoid this, but wondered if this is something that you / testers ever came across, and if I'm doing something wrong!

I think I've got a solution.

The existing part looks like this when put together - note the space between buffer-screen-a and buffer-bearing-insert inside the bearing:
Original buffer-bearing-insert.stl section view

My solution is to make buffer-bearing-insert longer, meaning that it butts up against buffer-screen-a, so the two parts clamp down against each other when the M3 screw is tightened:
New buffer-bearing-insert.stl section view

I've modeled this, and the .stl and .step are available here: longer-buffer-bearing-insert.zip (onshape project).

hi :)

it’s pretty simple to make the bearing insert longer. in my own setup there is no space, so maybe you have different sized bearings? can you provide some measurements of the bearings, and maybe some images of the bearing in the wheel?

ok, try the m5-bearing branch and buffer-screen-b-m5.stl. I'm not sure how standard m5x12 button head screws are, but if you have any sitting around this setup should be a bit stronger. let me know how it works out :)

Sorry it's taken so long to get back to you.

what kind of bearing are you using? I'd assume they are flush with the flat parts of the filament walls like mine are?

I can't see how there could possibly be no space between the bearings, unless your bearings are ~5mm thick? AFAIK 608 bearings are 7mm thick as standard, so surely there must be a gap?

fixed. thanks!