60MPH 11kW Qulbix Raptor
- Thread starter snellemin
- Start date
Merlin said:wtf?
broke the axle? is this the first one now? never heard about a broken axle from a cromotor.
I think the V1 had some failed axles, but I could be wrong. I'm just glad the axle failed at very low speed while I was giving my kids rides in the back yard. Failure at high speed would of hurt badly.
The axle failed where the threads on the axle ends towards the disc brake side. I'm wondering if the crazy regen is what caused the failure during my commutes. I didn't over torque my axle nuts as I'm using Nord lock washers.
Now to find a new axle or getting somebody to make me a new one.
jansevr
1 kW
I broke an axle on a v1. It was due to a controller syncing problem with the motor. It went from full throttle to locking the motor up at about 40mph and 15000w or so. The axle sheared on both sides and shot out of the back of the bike. I don't have the pictures on my phone but will try to find them later - I can't make this shit up haha. Pretty scary stuff. Luckily it was raining and the roads were wet so I just slid across the pavement and was unhurt.
macribs
10 MW
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snellemin said:
There is a 3D drawing of an enhanced Cro axle here on the forum. Search for Cro axle. IIRC that cro motor had the axle snap at the exact same spot. After new axle was milled problem was solved. Maybe you can use the same drawing? If you like it and think dimensions are the same as your axle you could just send the 3D drawing to any machine shop and have them give you a price quote.
macribs
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This the one you found? https://endless-sphere.com/forums/viewtopic.php?f=2&t=53931
think there was a forum gathering to design that new axle. Lots of ideas got thrown around to come up with a new and stronger design. Probably material quality could have an impact as well not just added thickness of the axle but the steel/material.
So are you getting Titanium axle or heat treated hardened steel? Or mild steel?
think there was a forum gathering to design that new axle. Lots of ideas got thrown around to come up with a new and stronger design. Probably material quality could have an impact as well not just added thickness of the axle but the steel/material.
So are you getting Titanium axle or heat treated hardened steel? Or mild steel?
macribs
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Oh man you are lucky that din not happen at WOT and full speed ahead.
What made it give you think?
Maybe if you are lucky you can find someone here on the forum with enough tools and machines in the garage to help you out?
Machinists usually charge extra when working with harder steel or even Titanium because milling, drilling etc is more time consuming and harder on the tools.
But can you really set a price on safety?
What made it give you think?
Maybe if you are lucky you can find someone here on the forum with enough tools and machines in the garage to help you out?
Machinists usually charge extra when working with harder steel or even Titanium because milling, drilling etc is more time consuming and harder on the tools.
But can you really set a price on safety?
I'm thinking regen did it over time. I would say the Sabvoton pushed it over it's limit. The 18 fet controller before hand did not regen as hard as the Sabbie.
Well I know a machinist here in Houston and I'll go ask him what it will all cost me for 3 units. I'll bring along the pics to give him an idea what improvements I need over stock.
Well I know a machinist here in Houston and I'll go ask him what it will all cost me for 3 units. I'll bring along the pics to give him an idea what improvements I need over stock.
Received a new QS motor yesterday. 19" moto rim with 5T motor. Wheel is laced for a single speed freewheel, so it's offset. Going to have to move the rim to the center of the motor. That way it seems I can use spacers just on the freewheel side and still put on my old 5 speed freewheel.
With some spare time, I'v test fitted the new QS onto the Raptor. I must of gotten a version that was made on a Friday. One spoke was over tightened and a few barely took any force to loosen up. So the over tightened spoke just snapped when trying to break it loose.
Plus side its that I don't need a lot of spacers to fit the the QS into the swingarm with the 5 speed freewheel. Spokes have been ordered from Holmeshobbies and some disk rotor spacers from Fleabay.
The Cromotor side covers is where the big difference is between the QS covers. I never heard anything back from Greyborg in regards to a replacement axle, so they lost me as customer for good.
I got me a Shinko SR241 19" x 2.75. It's just a bit shorter then the 26" x 2.3 Michelin Pilot Sport.
Plus side its that I don't need a lot of spacers to fit the the QS into the swingarm with the 5 speed freewheel. Spokes have been ordered from Holmeshobbies and some disk rotor spacers from Fleabay.
The Cromotor side covers is where the big difference is between the QS covers. I never heard anything back from Greyborg in regards to a replacement axle, so they lost me as customer for good.
I got me a Shinko SR241 19" x 2.75. It's just a bit shorter then the 26" x 2.3 Michelin Pilot Sport.
