3-D printed ebike - Platzhirsch

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Deleted member 4210

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3-D printed Chromoly steel.


Amazing how technology for manufacturing is advancing as well as the end product.

Interesting frame design that is apparently acting as a 'suspension' of sorts to cushion the ride.

There are other 3-D printed ebikes out there, but this one is fairly unique.
 

rich c

Well-Known Member
Article says “The frame is made out of 'organic steel' that is then 3D-printed according to Urwahn's specifications”
Doesn’t sound like chromoly.
 
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rich c

Well-Known Member
Any idea how you extrude a line of chromoly and get the next layer to stick to it? Must be different than any process I am aware of.
 

indianajo

Well-Known Member
In the 1950's bike frames could fall apart at the weld to the steering tube, and stab you in the belly. I was done so, by a bike from Sears made in W. Germany. 3 spot welds "held" the frame tube on to the steering tube.
As bad as ****ese quality is, the bike manufacturers have made sure that doesn't happen these days. A $200000000 lawsuit might be won. The *****iest Diamondback or Pacific frame has held together for me, even when I weighed 213 lb and was carrying 50 lb groceries in a 25 lb basket. I did break a shimano 6 speed rear axle, which didn't stab me.
Now some dingbat wants to make that joint with 3D sintering of powdered metal? Tort lawyer's sharpen your pencils!
 

Nova Haibike

Well-Known Member
In the 1950's bike frames could fall apart at the weld to the steering tube, and stab you in the belly. I was done so, by a bike from Sears made in W. Germany. 3 spot welds "held" the frame tube on to the steering tube.
As bad as ****ese quality is, the bike manufacturers have made sure that doesn't happen these days. A $200000000 lawsuit might be won. The *****iest Diamondback or Pacific frame has held together for me

Bikes sold in the United States have to meet CPSC standards, which include strength requirements for frames and forks.
 

rich c

Well-Known Member
Here's an interesting video, showing the issues of fatigue strength. It looks like the bike announcement could easily just be a marketing gimmick.
 

Mr. Coffee

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A Demented Corner of the North Cascades
In the 1950's bike frames could fall apart at the weld to the steering tube, and stab you in the belly. I was done so, by a bike from Sears made in W. Germany. 3 spot welds "held" the frame tube on to the steering tube.
As bad as ****ese quality is, the bike manufacturers have made sure that doesn't happen these days. A $200000000 lawsuit might be won. The *****iest Diamondback or Pacific frame has held together for me, even when I weighed 213 lb and was carrying 50 lb groceries in a 25 lb basket. I did break a shimano 6 speed rear axle, which didn't stab me.
Now some dingbat wants to make that joint with 3D sintering of powdered metal? Tort lawyer's sharpen your pencils!

The tort lawyers are already too busy with carbon fiber bikes to do anything else.

Google "carbon fiber bike catastrophic failure". And look at the images and try not to cringe.