I’ve been very interested in 90 degree drives once I saw @Linny post his awesome build using a set that are apparently not available anymore. About a year ago, I mocked up a very basic spiral bevel gear setup to test on the bench. Results were promising, but I left it at that. I have since revived that project, and will be making a few sets for testing as I feel comfortable with the latest design For now, it will be a 2:1 gear ratio, with a kegal adapter to fit mad 105mm wheels.
Much more coming on this project,
(The motor mount interface is not completed in this pic)
Send a set to @rafaelinmissouri for some thane wheel testing
How viable is it to increase the gearing ratio? If you’re limited on space for the wheel gear, what about a dual stage reduction? 2:1 is okay, but if you’re wanting to run crazy large motors for power, the ability to run some truly crazy reductions would be awesome haha.
This is awesome! How large is the casing? What are the smallest wheels you can feasibly run?
2.0 is perfect for 100mm wheels.
I ran 2.2 on mads for quite a while, the extra few mph will be welcome. 2.2 capped at about 42mph.
Clearance on bn street drives were not great…
This was a new drivetrain/motors 1600mi old. Delammed a few wheels and snapped a hanger along the way. Both motors about shot by the end.
Keen to see what the clearances will be.
Exciting stuff Phil!
2.2 works yes, but a higher reduction would let us run higher kv motors, and push more amps - more performance if you want it. Why not make a secondary reduction stage that can be removed from the 90 degree drive, allowing you to either run it at 2.0 or add on a secondary stage to get more reduction?
Not saying its not a good idea(!), just saying its sufficient for the wheels hes designing them for.
Sounds expensive and more parts to break make ya street face.
Excited for these! Need to make a new thane build.
2;1 is not my ideal ratio. I bough these gears off the shelf for another project, but needed to modify them for this purpose. I’m using them as a test bed for the overall design concept. If things go well, I will modify the ratios accordingly.
Watching! I think 2.7 to 3 is a good ratio personally. 190kv is the best motor choice, and it would allow for slightly higher voltage, if you were to go for 170kv
I want to put extremely long inrunners on this like right now
Your motors would be able to be longer than the hangers
for wheels upwards of 100mm i totally agree with this ratio range
I use this on 80mm wheels works well for me on 3P set ups in hilly short commute. watch them e bikes slow to a crawl as you fly up the hill
I am 111% up for a set of these, whenever an over the Pond Shipment can be arranged.
Super looking forward to it! Throwing these on a set of 3 links would be amazing too.