I think 20*20 is Apex Air/Luna size if you can shave 1mm
Ok potentially silly question: is this thread gap intentional? It’s on all 4 axles and seems deliberately marked by the black but it’s also got a fairly rough cusp (I think but not sure that that’s the correct machine term) and I can’t think of a reason for it
For @bearlyrecognized this is all correct but one thing to add: the motor won’t be consuming power by regen braking, but it will still be getting hot. There is a possibility that you’d overheat the motor if you hit a downhill at speed and have to continuously brake. VESC has a fun feature where the thermal limit is more generous in braking than accelerating for this specific reason. Stopping is more important than unhappy motors
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No, but probably not deadly. I would run a die down it to clean up any smushed threads and just be cautious when tightening. Only the first few threads to the work, rest are there just to provide moral support.
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I have never in all my existence seen a thread gap like that be intentional. Were those new?
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Yeah straight out of the BN box this morning, I haven’t loctited them down yet and now I’m glad
@Boardnamics have you encountered this before? I’m a bit worried to attach wheels to them
They’re made from shoulder bolts. Latest batch had the relief deeper than usual so thread isn’t fully present there. I tested them and they held together just fine, so long as one doesn’t go crazy with the preload, which isn’t necessary anyways.
The threads are cut after the fact, so they’re already clean. It is because they were cut with an absence of material in the original “stock”
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Is 36T the max size pulley suitable for Caguamas? Might try printing a guard and coating in epoxy or something if I try a 40 but I’m trying to gear down as much as possible
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I think you can probably definitely use a 40T on those. I can check when I get home if you want.
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You were right, I checked today in better lighting, and it’s evident that the plate the bushings rest on has been bent out of shape to the point where it’s useless. How rubber bushings managed to bend metal IDK, maybe MBS is using the finest Chinese pot metal, or maybe running 90a bushings is more than it can handle, whatever it is, that is what the problem was.
Note how much closer the metal is to the deck on the far side than on the close side and how asymmetrical it is.
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Yeah it definitely looked that way in your picture. Not sure how it would have gotten bent out of shape like that from just regular use but good for others to keep an eye on theirs as well.
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Beautiful thanks
Speed rings: what are they made of? Steel?
And why aren’t they made of brass or graphite?
Usually some sort of metal, like zinc plated iron, aluminum, or steel. They’re just washers that add some space between the nut/hangar and the bearing surface, so there’s no need to make them out of anything expensive or special.
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Some of the spacers used on motor shafts are bronze.
But like @frankthedragon said, they’re just axle spacers.
You’d think with a name like “speed rings” they’d have some sort of lubrication property
Poorly named, for sure.
Probably because initially they mitigated bearings rubbing on hangers and/or kept them out of a mechanical bind from tightening the axle nut.
What about now? In a world of precision, or at least appropriately shaped hangers and axles?
Are they still necessary or are they now relegated to “washer” status and only used to achieve allignment?
IDK
I personally only use them for spacers.
You still often need one to keep the bearing away from the hanger so it doesn’t rub.
But it all depends on your design and the other parts
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