Doc's ULTIMATE TORQUE ARMS fit most of the frame UPDATE 2013

[Doctorbass]

NEW BATCH OF 75 SET ARRIVED !!! feb 2012 please go to page 13 for last updates


Shipping price: ( see grid below)

go to page 21 for the last updated desing REV 5
http://www.endless-sphere.com/forums/viewtopic.php?f=31&t=29129&start=300


LIMITED QUANTITY OF THE DOC'S ULTIMATE TORQUE ARM !!

Very simple and versatile torque arm.

Dual torque arms set
You pay 32$ and you get 2 torques arms (One for the left side and one for the right side with the leg for the derailleur.

Can be glued or welded or fixed with screw.

Precision Laser cutted quality steel.

Match perfectly the shape of the 10mm axel of X5, 9c, HS and HT and many popular hub motors

3/8" thick ( .375mil) (9.525mm) ( Your axel will twist BEFORE they break!!)

The Steel is DOMEX 100 ( Weather Resistant Extra High Strenght) : http://www.beauroc.com/uploads/DOMEX_100W.pdf

The disk diameter is 2.000"

NO MORE FEAR ABOUT USING REGEN !!! .. The nuts can not only be used to hold the hub and wheel axel in place as it should.. and all the torque can be supported only by the flat of the axel and torque plate.

Include the M10 x 1.0 Threaded hole to install your rear derailleur

I use one set of each on all my ebikes ( one is welded, one is glued with DP420 epoxy (the one that towed a schoolbus! ).. so imagine the toruqe applied! and a last one fixed with screw. They all work really perfect!!..

32$ per set + shipping (I include the drilling job and threading job for the rear pivot of derailleur M10 thread ( not shown on the picture)


( note that on these following pictures this is the 3/8 AND the 1/2" thick that are shown AND ARE THE OLDER GEN)

[bjosta]

Looks great, PM sent!

[ambroseliao]

I have seen these when I visited the good Doctor in person and they are truly hefty. Thanks for offering these for sale.

Ambrose

[mikebikerad]

I used docs files and made some using good ol 4130 and these are bomber. I made them also clamp onto the axle. My bike is over 100 pounds and pushing 7kw and they have been great I like being able to tellmy buddies my dropouts are glued on

This is a killer deal, just the metal cost me more.

[liveforphysics]

Great job Doc! I love it!

[Doctorbass]

7 set availlables



For those who dont want to bother with welding them or using screw on their dropout, you can use this epoxy:

DP-420 ( ideally the black).. not the off white wich is a bit less strong

The black( grey) color DP420 epoxy is capable of 4500psi overlap shear force

considering that you will be able to apply at least 2 square inch of that glue, that's 9000psi overlap shear force on your dropout...

At that force, what will break is your axel by twisting.. not the torque arms!!

http://www.shop3m.com/62328014352.html




( you might need an applicator or the piston to push on both tubes.. but instead i recommand to diy a U shape rod that will push on both pistons of the tube at a time.. that will save you money!.. just ensure to push equally on both to get the proper mix ratio )

EVERY metal parts of all my 4 ebikes that i needed to attach together and where screw was not the best or easy solution, i used that DP420

and i am still really impress on hot it is so strong!!!

Perfect cure time is 7 days... at ambiant.. but after 24 hour 90% of the strengh is acheived

and at 100 celsius temp of curing, you just need 30 minutes and to let the part to col down to abmiant and leave it oe hour alone to stabilize.

You can sand both part to abeliorate the surface roughness and actice surface of both parts..

ENSURE THAT BOTH PART TO GLUE TOGETHER ARE PERFECTLY CLEAN!!!.. no grease, ... you can use isopropylic or normal alcohol or aceton



ONE LAST THING..

IF you glue them with the DP-420 NEVER EXPECT TO BE ABLE TO REMOVE THEM AFTER YOU WILL HAVE ATTACHED THEM TO YOUR FRAME !! ... or... accept to put your frame in an oven at 200 celsius or above to soften the epoxy... and fragilize the heat treatment it had.

Doc

[Spacey]

Damn ... now this is what I need

Hit me with a set.... PM'ing details.

[Doctorbass]

no prob Spacey. i'll keep you one set

4 left

Doc

[Doctorbass]

ALL 16 sets SOLD

( the pm i received have been all answered and people who requested them are on the list fo rthe actual batch and will have them)


Would you like that i proceed to make a next batch?

Doc

[Doctorbass]

I got them today. i'll need to adjust them a bit with a file because they are exactly 9.98mm.. wich is 20um too thin so the axel wont enter Remember.. it's not aluminum and we can't just force it.. it'S too strong!

Please note that the tolerance of all 10mm standard hub motor axel on the market vary up to 50um thick.. so i'll do my best to make a trade off and correspond to most of the case. for people withlitle over tolerance axel, you might need to use a file and adjust them.. it'S easy but it take some time to get the PERFECT fit.. no loose not too squeezed.

i'll alsy make the M10x1.0 threads on all 16 set.. it's like 1h work.

Overall i'm really satisfied with the laser cut job! it's better than my own batch got last year because they now have a better and $$$$ laser cut equipment.

I'll ship all 16 set on Monday. Tomorrow, it's the Canada day 1 july and everything is closed.

i'll also order a next batch. Already (5 sets reserved )

Doc

[Doctorbass]

Hi all,

The batch i ordered past two weeks had to be reworked because they was too tight and i would have needed to use a file on all 16 sets! before to ship them

When i say they are a bit tight, i mean that i forgot to include the machining tolerance of their laser cuting machine in my desing so instead of having 10.00mm they have 9.980mm.

I have a dummy 10mm brand new X5 axel to test them. it have 10.01mm but the steel of the torque arms is so hard than it's impossible to enter the axel if there is only 0.001mm difference over this is 100 000psi steel so it absolutly wont torsion to accept the axel over thichness...

The next batch will have 10.200mm to ensure that all tolernace of axel will fit and that is also to facilitate the insertion on the axel on BOTH torque arms, left and right i case where they could be missaligned.

I took this decision to delay the shipping of the 16 sets because i did not wanted that people receive torque arms that need to be reworked too much to fit to their motor axel.

The last batch i ordered ( 40 sets ) have this adjustment done and a little improvement to to facilitate the acces of the axel in the dropout.

I expect to receive them today or tomorrow. This is a larger batch of 40.

I paid for a new batch to avoid to correct manually with a file for 30 minutes each set (time consuming) the first batch. That rise the cost to me but it's my little desing error and you already all have paid for your sets so i'll absorb the difference. It end out that i dont make any money with these torque arms, but at least that will reduce the number of thread that people post when they break their dropout and this is the goal. I just might make some little profit with the 24 set left from this 40 set batch

So the good new is that they will fit better and that i'll have 24 additional set for sale!

I expect to have time to make the thread ( M10 x1.0) on the 16 sets already sold tonight or tomorrow depending on when i receive them.

I'll than ship all these sets immediatly.

I hope this is ok for everyone.


Even if you woud preffer a set from the first batch that are 9.980mm to fit with your thinner axel than please inform me i will be able to ship them immediatly.

Doc

[Doctorbass]

This is the revision C of the last batch of 40 ( except that the drw004 is now revision D like)

( Please note that the DRW004 had little modifications and is exactly like shown on the jpg (revision D) so the 3 little holes ( to save weight) are removed because it was impossible to make them with the laser cutting tool so they are exactly like shown on the jpg DRW004D file. The DRW003 remain the same

Doc

[Karl]

Hey doc, I am wondering if it will fit on my norco 125... If so Ill order one right now

Thanks,

[Doctorbass]

Hey doc, I am wondering if it will fit on my norco 125... If so Ill order one right now

Thanks,

Hi

They can fit on any frame.. but you might need to make some adjustment on them or on your actual dropout. some brace are making interference sometime and you might need to adjust them.

Some will put the torque arm inside and some on the external of the actual dropout. it depend on the frame you have.

You can cut them, grind them, use a file on them to adjust them to fir perfectly... no bicycle dropout are made tghe same way.. they all have some little difference on teh thickness and shape.

I choosed 2" diameter and 3/8 thick to ensure that they can endure every 10mm motor axel torque it exist. this is teh best trade off i found and i have one set on all my 3 working ebikes now and i use regen on 2 of them up to 4kW and never had any problem. i'm 110% satisfied with teh result and that's why i want to share that with E-S

PM me if you want a set

Doc

[Karl]

before ordering can you post pictures of them installed on the bike

and are they holding with DP420 only?

[Stevil_Knevil]

Hi Doc,

The axle on my HS35 C-lyte measures 9.97mm @ the flats, so your last batch of 'too tight' arms should be 'just right' for me!

[Doctorbass]

Hi Doc,

The axle on my HS35 C-lyte measures 9.97mm @ the flats, so your last batch of 'too tight' arms should be 'just right' for me!

No problem.. As i said I offer you both options.

I can send you set of the first batch if you wish.

Pm me

[Stevil_Knevil]

PM sent

[Doctorbass]

before ordering can you post pictures of them installed on the bike

and are they holding with DP420 only?

Yes they hold perfect with epoxy DP420 and DP460 wich are the best epoxy product for this use.

As i said in the thread i towed a 14000pounds school bus with my mongoose that have these torque arms just holding with this epoxy 8)

See the next post for more explanation:

Doc

[Doctorbass]

Here is a little 10 minutes video whre i give you some details on the torque arm installation and some close up on my 3 ebikes using them:

Enjoy!



Doc

[deVries]

Here is a little 10 minutes video whre i give you some details on the torque arm installation and some close up on my 3 ebikes using them:

Enjoy!

Thanks for the video Doc.

At what power levels v/a do you think you need 2 torque arms vs using just one torque arm to avoid twisting w/o using 2 torque arms?

Heya, (belated) congratulations for your 35e-birthday at ES & soon to be getting a 5404 too! I'm very pleased/happy for your new power-toy, and I look forward to your analysis AND testing of this almost "insane" motor.

Btw, have you done any special air cooling mods on your X5 motors?

[Doctorbass]

Here is a little 10 minutes video whre i give you some details on the torque arm installation and some close up on my 3 ebikes using them:

Enjoy!

Thanks for the video Doc.

At what power levels v/a do you think you need 2 torque arms vs using just one torque arm to avoid twisting w/o using 2 torque arms?

Heya, (belated) congratulations for your 35e-birthday at ES & soon to be getting a 5404 too! I'm very pleased/happy for your new power-toy, and I look forward to your analysis AND testing of this almost "insane" motor.

Btw, have you done any special air cooling mods on your X5 motors?

I would recommand using a torque arm on any ebike that have the X5, HS or 9C or BMC motor... all those motor are known to deliver great torque... but for sure 500W would not dammage your dropout.. but let say everything above 1000W

But it depend on alot of parameters... aluminum or metal is not the same thing !.. the thickness etc...

But.. having torque arm let you avoid the fear of a danegrous potential accident or situation.. when using powerfull motor.

For me, using is not a choice.. it's a must!

Doc

[deVries]

At what power levels v/a do you think you need 2 torque arms vs using just one torque arm to avoid twisting w/o using 2 torque arms?

I would recommand using a torque arm on any ebike that have the X5, HS or 9C or BMC motor... all those motor are known to deliver great torque... but for sure 500W would not dammage your dropout.. but let say everything above 1000W

But it depend on alot of parameters... aluminum or metal is not the same thing !.. the thickness etc...

But.. having torque arm let you avoid the fear of a danegrous potential accident or situation.. when using powerfull motor.

For me, using is not a choice.. it's a must!

Hi Doc,

I agree that using at least one torque arm is an essential safety measure.

But! When do you think it is essential to use 2 torque arms on both sides of the dropout? At what power levels do you think you need 2 torque arms on both sides? (Just an estimate or your best guess is all I'm asking.)

Thanks!

[Doctorbass]

At what power levels v/a do you think you need 2 torque arms vs using just one torque arm to avoid twisting w/o using 2 torque arms?

I would recommand using a torque arm on any ebike that have the X5, HS or 9C or BMC motor... all those motor are known to deliver great torque... but for sure 500W would not dammage your dropout.. but let say everything above 1000W

But it depend on alot of parameters... aluminum or metal is not the same thing !.. the thickness etc...

But.. having torque arm let you avoid the fear of a danegrous potential accident or situation.. when using powerfull motor.

For me, using is not a choice.. it's a must!

Hi Doc,

I agree that using at least one torque arm is an essential safety measure.

But! When do you think it is essential to use 2 torque arms on both sides of the dropout? At what power levels do you think you need 2 torque arms on both sides? (Just an estimate or your best guess is all I'm asking.)

Thanks!

3kW and up

Doc

[Spacey]

That video is so good, it is so much easier to explain things to people wth video.

Can't wait to have mine installed on my bike, top job Doc