Torque Arm Training Wheels

General Discussion about electric bicycles.
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Bikerboywashere   1 µW

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Torque Arm Training Wheels

Post by Bikerboywashere » Mar 24 2020 12:31pm

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Last edited by Bikerboywashere on Mar 25 2020 4:41am, edited 1 time in total.

torker   1 MW

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Re: Torque Arm Training Wheels

Post by torker » Mar 24 2020 6:56pm

Also that is probaby soft metal. Are you using a rear hub? How much power?
Dave When I die I want to slide in sideways yelling WooHoo what a ride !

Giant Rincon w rear 9C 6*10 36 v x 20 amps
Specialized FSR Comp 9C 6*10 48v x 30 amps

markz   100 GW

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Re: Torque Arm Training Wheels

Post by markz » Mar 24 2020 7:36pm

Just go to your Homeless Despot and grab some 1/4" steel and your angle grinder, grab some hose clamps and call it a day.

Bikerboywashere   1 µW

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Re: Torque Arm Training Wheels

Post by Bikerboywashere » Mar 24 2020 11:19pm

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Last edited by Bikerboywashere on Mar 25 2020 4:42am, edited 1 time in total.

goatman   10 kW

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Re: Torque Arm Training Wheels

Post by goatman » Mar 24 2020 11:49pm

it wont hold up to regen, theres a torque arm picture thread with a lot of good ideas
viewtopic.php?f=2&t=26444

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amberwolf   100 GW

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Re: Torque Arm Training Wheels

Post by amberwolf » Mar 25 2020 12:02am

the main thing with the arms isn't even how hard the metal is. it is how precisely the axle flats fit the arm faces. if there is any slop, the axle will either rock or cut into the face of the arms, whcih will eventually let the axle rotate inside the arm.


regarding different metals and their hardnesses...aluminum *can* be soft, but there are quite a few different alloys and treatments of them, resulting in many different hardness levels (and other properties). some of them are harder than some steels.

also...if you have a soft steel, you can harden it to some degree with heating and cooling at the right rates and amounts (same with aluminum). (even harder surfaces can be made with carbon applications, "case hardening", etc, but those may not be within a particular diyer's capabilities, where the simple heating and cooling often is).



for those that havent' seen it, there is a torque arm picture thread with a lot of examples.
viewtopic.php?f=2&t=26444

to the op, you may wish to post the details of exactly how you use these, and their origin, in that thread for others to find.

docw009   100 kW

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Re: Torque Arm Training Wheels

Post by docw009 » Mar 25 2020 11:30am

I've made some torque arms out of shelf brackets, which are soft steel.

I think the benefit is that the metal holding the axle is doubled in thickness, and my arms are bolted to a chain stay, not held with a hose clamp.

.

markz   100 GW

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Re: Torque Arm Training Wheels

Post by markz » Mar 25 2020 9:34pm

I am having luck with the generic slotted rear derailleur hangar.
Clipboard02.jpg
Clipboard02.jpg (26.44 KiB) Viewed 116 times
I cut the hangar off the rd that broke on me and eyeballed the other side, but never bothered to do anything.

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amberwolf   100 GW

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Re: Torque Arm Training Wheels

Post by amberwolf » Mar 26 2020 11:13pm

apparently the op is yet another "hissy fit self-deleter". :roll:

(they've self-deleted their posts and pics)

john61ct   1.21 GW

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Re: Torque Arm Training Wheels

Post by john61ct » Mar 27 2020 10:11am

Many forums disable the ability to do that after time has passed

markz   100 GW

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Re: Torque Arm Training Wheels

Post by markz » Mar 27 2020 2:31pm

Well he couldnt delete the posts because they were responded to. Can only edit, but if the post was quoted then the post would have stayed online. People get the gist of what the OP was talking about just by the title.

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