Onyx Hubs uses them, but in a high end hybrid bearing setup. I like the full floating axle setup. Load and drive carried separately. I'm not sure why anyone bothers with ratchet pawl type clutches. Multiple pawls, but only one engages at a time, noisy, slack between engagement points. Sprag clutches are used in automatic transmissions. They're off the shelf tech. Why can't we have nice stuff.
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Last edited by Retrorockit; 01-13-2023, 10:48 AM. -
Natural news topic when I clicked on,? China preparing to launch an invasion of Taiwan, warns Chinese journalist.Originally posted by Retrorockit View Post
Remembering the 1930`s-1940`s Why should I care I`m not a Chinese Journalist.
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On 2nd though this could be a major disruption.
My Luna SRX-Light Bee will might need parts from China soon. -
Sorry I posted the wrong link. Don't worry about the start of WW3 it's not schedules until 2024.
I fixed the first post. -
Yup, Taiwan a mess, china a mess. Totally unpredictable. But they still being pounded by Covid. Covid in the military invasion ships is no help to them at all. So China is rather hamstrung in getting things done. Thats why all the saber rattling. They are no way prepared for war for now. But we are wrapped up in Russia, so hard to say what the Chinese would try. The world in the grips of a cluster fuck started when China was messing with things that got out of hand.
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Not that it's important, but has anyone taken apart the BBS motor clutches to see whether they are sprag or the ramp-type overrunning clutches.....
Sprag:
Ramp-type:
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BBSHD has pawls at the pedals, and a roller bearing ramp style in the plastic gear.. The ramps are just formed into the outer bearing race. -
The ramp roller clutches can double as a roller bearing. Espcially since they're usally under no load when released. The ones in the BBSHD are nice because they have separate roller elements. The TASDZ2 not so much.
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Paw clutches are really cheap to make. Sprag clutches require the precision of a bearing factory to make. And china drove down the price of bikes. So sprags are not a profitable item for bikes. They do show up in the motors because the motors cost so much. Also sprags hate dirt contamination. Paws don't mind so much.Comment
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Have you folks played with the Tongsheng TSdZ2 mid drive? Sprag clutch and torque sensing in a mid drive conversion sounds appealing… Not sure about availability.Comment
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It has many known quality and strength issues. I own one and have hardly ridden it. TSDZ2 people just seem to accept a bunch of crap that doesn't exist in the BBSHD world.
IMO it's a 350W moyor being run at 750W. It has no cooling as it comes. This can be fixed. Endless sphere has an endless thread on these things. Stripped plastic gears, and snapped pedal shafts abound. if you want to add a throttle a new controller and wiring harness are needed. Those may not come programmed for a throttle. You may need to fabricate a harness to program it ( that's where mine is at right now). You can geek out on the open source firmware (most of the thread is related to that). Basically fixing them is a hobby unto itself. Look before you leap. Compare what you see at the ES TSDZ2 thread to what you see here. I donated a simple cooling mod there.
I think the quality of the bearings is questionable, and since some are noisy, some not, somr break others don't I suspect the machine work is inconsistent also.
I'm too busy riding my BBSHD to be bothered with it.
I think they got sued by Bafand and had to add a sprag. or maybe they just did ti on their own (unlikely from what I've seen).Last edited by Retrorockit; 01-29-2023, 05:49 AM.Comment
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