Heavy Duty Torque Arm - Disc mount, clamping optional $35

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cwah   10 GW

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Re: Heavy Duty Torque Arm - IS mount, clamping optional $35

Post by cwah » May 21 2016 7:49am

Interested. How would tht work on the other side of the bike? I ideally would like 2 torque arm, one on each side.

Thanks

dmwahl   10 kW

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Re: Heavy Duty Torque Arm - IS mount, clamping optional $35

Post by dmwahl » May 21 2016 10:07am

I only use one in the non-drive side, maybe try printing out the template on the first post and see what it would look like? You could glue it to some cardboard or thicker material to get a good idea of how it might fit. They're designed to mount to the disc brake mount, so I don't know how you'd get it on the other side but post here if you figure something out.

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Re: Heavy Duty Torque Arm - IS mount, clamping optional $35

Post by dmwahl » Jul 19 2016 12:13pm

Bump. Plenty available right now.

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Re: Heavy Duty Torque Arm - IS mount, clamping optional $35

Post by dmwahl » Sep 06 2016 9:02am

This weekend I drilled and tapped one torque arm for clamping. Using a drill press I first used a center drill to start the hole, then used a good sharp 5.0mm HSS bit to drill the pilot hole, followed by a 6.0mm hole through one side for bolt clearance. Lots of cutting fluid to keep the bits cool helped a lot, and strong pressure to keep the bit cutting before the steel work hardens. Key to the whole process was using sharp bits, cutting fluid, and oil for tapping along with frequent backing out the tap to break chips. I also used a sacrificial piece of scrap aluminum through the middle to keep the piece flat in the drill press clamp.

I'm investigating having a machine shop do this on a larger quantity of parts, as I just don't have the time to do it myself. But for those with the right tools it's not a difficult process.

The screw is 30mm long, M6x1.0 thread.
IMG_20160902_173851.jpg
Clamping torque arm
IMG_20160902_113233.jpg
Clamping torque arm

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eyebyesickle   10 kW

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Re: Heavy Duty Torque Arm - IS mount, clamping optional $35

Post by eyebyesickle » Sep 07 2016 6:36pm

nice, these would be great for the cheaper bicycle frame conversions that never come with/have disc mounts... 2 birds with one stone... (i'd slap a cheap one on the other side, even though I am talking low power conversions...)

dmwahl   10 kW

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Re: Heavy Duty Torque Arm - IS mount, clamping optional $35

Post by dmwahl » Sep 09 2016 8:54am

eyebyesickle wrote:nice, these would be great for the cheaper bicycle frame conversions that never come with/have disc mounts.
Are you thinking to add a disc brake mount? I woudn't recommend using them to add a disc brake as the forces involved in braking can be greater than due to the motor, and would then be carried by the axle instead of the frame. Sorry if I'm misinterpreting your comment, but these are only intended for use when you already have a disc brake mount.

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eyebyesickle   10 kW

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Re: Heavy Duty Torque Arm - IS mount, clamping optional $35

Post by eyebyesickle » Sep 09 2016 8:49pm

dmwahl wrote:
eyebyesickle wrote:nice, these would be great for the cheaper bicycle frame conversions that never come with/have disc mounts.
Are you thinking to add a disc brake mount? I woudn't recommend using them to add a disc brake as the forces involved in braking can be greater than due to the motor, and would then be carried by the axle instead of the frame. Sorry if I'm misinterpreting your comment, but these are only intended for use when you already have a disc brake mount.
Ah, makes sense. No you had it right. Looking for shortcuts. I should know better :)

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Re: Heavy Duty Torque Arm - IS mount, clamping optional $35

Post by Daim11 » Sep 11 2016 7:53pm

Hey David,

You still have these Torque Arms?

dmwahl   10 kW

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Re: Heavy Duty Torque Arm - IS mount, clamping optional $35

Post by dmwahl » Sep 11 2016 8:06pm

Yep, plenty in stock. I keep the first post up to date with availability, and the paypal link (for USA) also keeps track of stock and will warn you if I'm out.

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Re: Heavy Duty Torque Arm - IS mount, clamping optional $35

Post by Daim11 » Sep 11 2016 9:35pm

Order on the way...

Thanks David!

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Re: Heavy Duty Torque Arm - IS mount, clamping optional $35

Post by Daim11 » Sep 11 2016 9:56pm

Order placed, looking for the Clamping unit. Thank You!

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Re: Heavy Duty Torque Arm - IS mount, clamping optional $35

Post by Daim11 » Sep 16 2016 5:48pm

Torque arm arrived today, very solid/thick piece with clean edges. Looks and feels just bullet proof, Thank You!

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bionicdan   1 kW

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Re: Heavy Duty Torque Arm - IS mount, clamping optional $35

Post by bionicdan » Sep 28 2016 4:47pm

maybe it would help to list the frames its working for? I got rust on mine so painted it and had to grind a few lumps out but it fits an orange patriot 2002 :)

Image

ps my dropout had been bent open slightly allowing 4% of axle movement to line the holes up. Im not 100% sure if this would still fit if the frame hadnt been abused and was still snug.
GEARS? Where we're going we dont need gears!

Due to metal plates and a body full of nuts and bolts I am as bionic as my bike. Mxus 4t 120v toshiba fets and 16ah 24s nanotech.

dmwahl   10 kW

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Re: Heavy Duty Torque Arm - IS mount, clamping optional $35

Post by dmwahl » Sep 28 2016 4:58pm

Yes, definitely helpful to know what it fits on. Thanks for posting yours. I like the black paint, makes it blend in nicely.

Regarding the rust, a few of them have some, I believe due to the cutting process. They're stainless steel though so any corrosion will be minimal.

999zip999   100 GW

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Re: Heavy Duty Torque Arm - IS mount, clamping optional $35

Post by 999zip999 » Oct 04 2016 8:41pm

Does it fit a diamond back response ? It looks like it.

dmwahl   10 kW

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Re: Heavy Duty Torque Arm - IS mount, clamping optional $35

Post by dmwahl » Nov 07 2016 2:41pm

999zip999 wrote:Does it fit a diamond back response ? It looks like it.
Can't say for sure, I only have room for so many bikes... Print out the template on the first post and that will tell you.

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Re: Heavy Duty Torque Arm - Disc mount, clamping optional $3

Post by rich43 » Mar 22 2017 1:39pm

Are these still for sale?

dmwahl   10 kW

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Re: Heavy Duty Torque Arm - Disc mount, clamping optional $3

Post by dmwahl » Mar 22 2017 1:51pm

rich43 wrote:Are these still for sale?
You bet. I have stock and have been getting them in the mail within a day or two of ordering.

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Re: Heavy Duty Torque Arm - Disc mount, clamping optional $3

Post by rich43 » Mar 25 2017 12:13pm

dmwahl wrote:
rich43 wrote:Are these still for sale?
You bet. I have stock and have been getting them in the mail within a day or two of ordering.
I have sent you a PM, I am interested in ordering one. :)

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Re: Heavy Duty Torque Arm - Disc mount, clamping optional $3

Post by dmwahl » Mar 25 2017 1:50pm

rich43 wrote:I have sent you a PM, I am interested in ordering one. :)
Replied.

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Re: Heavy Duty Torque Arm - Disc mount, clamping optional $3

Post by rich43 » Mar 25 2017 5:26pm

I paid but sent two $50 payments by mistake as PayPal glitched, can you refund one and keep the other as payment for the torque arm?
Edit: David refunded it :)
Last edited by rich43 on Mar 26 2017 4:17am, edited 1 time in total.

dmwahl   10 kW

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Re: Heavy Duty Torque Arm - Disc mount, clamping optional $3

Post by dmwahl » Mar 25 2017 7:52pm

rich43 wrote:I paid but sent two $50 payments by mistake as PayPal glitched, can you refund one and keep the other as payment for the torque arm?
Done.

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pwd   1 kW

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Re: Heavy Duty Torque Arm - Disc mount, clamping optional $3

Post by pwd » Apr 04 2017 7:39am

I've sent you a PM; its great that you have a pdf to test print it. I was going to try and make my own but your solution looks better than what I could fabri-cobble together.
Commuter/Street Build viewtopic.php?f=6&t=98286:
Rocky Mountain Element
Magic Pie 4 front + Leafmotor 1500 rear w/ Infineon 4 Clone @ 200A phase
Samsung 40T 14S7P

Offroad Build viewtopic.php?f=6&t=102195:
2019 Rocky Mountain Blizzard 20
Cyclone "3kw" 13T motor to 36T chain ring then 32T chain ring to 11T-46T Cassette @ 100A phase
em3ev 14S5P 30Q or 14S6P 25R pack

dmwahl   10 kW

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Re: Heavy Duty Torque Arm - Disc mount, clamping optional $3

Post by dmwahl » Apr 04 2017 8:53am

pwd wrote:...fabri-cobble...
Haven't heard that one before, I'm going to have to borrow it from now on.

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pwd   1 kW

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Re: Heavy Duty Torque Arm - Disc mount, clamping optional $3

Post by pwd » Apr 15 2017 7:30am

My torque arm arrived and I got it fitted:

Imagepost imgcertificity.com

I did some minor grinding to get it to clear the brake caliper and the frame. This is on my Rocky Mountain Element 10. The fit for the axle is perfect; I just filed it a bit on each side and it slid on nice and tight. Now the bike should be able to handle 40 amps and regen. Thank you dmwahl 8)
Commuter/Street Build viewtopic.php?f=6&t=98286:
Rocky Mountain Element
Magic Pie 4 front + Leafmotor 1500 rear w/ Infineon 4 Clone @ 200A phase
Samsung 40T 14S7P

Offroad Build viewtopic.php?f=6&t=102195:
2019 Rocky Mountain Blizzard 20
Cyclone "3kw" 13T motor to 36T chain ring then 32T chain ring to 11T-46T Cassette @ 100A phase
em3ev 14S5P 30Q or 14S6P 25R pack

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