Repository for 3D Part Models, Drawings & Schematics

[Miles]

#40 chain is the same pitch and roller diameter as bicycle chain but the width and therefore the sprocket thickness is greater. See here for dimensions: http://www.gizmology.net/sprockets. #40 sprockets are available down to 8t with boss and pilot bore.

#40 is the American standard. 08B is the ISO standard.

[Miles]

11t sprocket drawing. Scale 1:1

[boostjuice]

A shaved width #40 sprocket was my first thought too. The problem is, Bandaro specified a 10mm bore, but the smallest #40 11T off-the-shelf sprockets I could find all had pre-drilled minimum bore diameters of 1/2". I personally don't trust thin section reducing bushings acting as an adaptor in this case, because the set screw/keyway in the sprocket has no torque transferring material directly adjacent to the shaft it's torque coupled to. So then I thought a larger off the shelf bicycle sprocket (no narrowing required) with a 10mm ID freewheel adaptor (if they exist-or if Bandaro got one made) would be less work to adapt than the former option. However If Bandaro is willing to weld the sprocket on then a shaved #40 option with a spacer bushing would probably be easiest, just not so quickly/easily replaced if it needed changing.

[Miles]

You can get these in UK:
http://www.technobotsonline.com/sprocke ... ckets.html (Pilot bore 10mm)
The roller diameter for the British standard 1/2" chain is about 0.5mm larger than for #40, though... Probably too much difference......

I seem to remember that Matt had some adapters for freewheels made up. What bore were they?

Staton do adapters with 5/8", 3/4" or 1" bores:
http://www.staton-inc.com/store/product ... 86-25.html

[bandaro]

hmmm but technobots dont have 11 tooth unfortunately. I was considering ripping one off a cassette and welding a plate in the middle, but I was hoping to get it machined out, just because it will look a whole lot neater and probably be stronger. Welding onto the axle shaft is not an option unfortunately.

So at risk of being a pain, would it be possible to upload that in a rhino friendly format Miles? it is having an error and i cant even open the pdf as a 2d image on rhino. Or is it just my version thats playing up?

thanks all for the help, there is so much i still need to learn...

[Miles]

Here's the model in STEP AP214 format and the drawing as a DXF.

[bobc]

Binary planet harmonic gearbox
Mostly made from laser cut 3mm steel or stainless plate
I include a pdf drawing and the dxf files for the laser cutters
The triplex chain loop for the harmonic part is 8mm chain - a bit tricky to get hold of

[bobc]

Binary planet harmonic gearbox:
modified data, now with:
fewer planets, 8 instead of 12
higher ratio, 19.5:1 instead of 13.5:1
toothed belt(s) drive instead of 6mm chain(s)
NOTE error in sun.dxf - the drawing had 75 teeth instead of 74 - I will repost

[Miles]

STEP AP 214 file attached. (other formats? I can't do 3D DXF...)

[Free STEP viewer: http://stpviewer.com/ ]

- 6 x 6mm holes on 5-1/4" (133.35mm) diameter circle.
- 4-9/16" (115.89mm) registration diameter.
- 6 x 5mm holes on 44mm diameter circle.
- Weight when made from 6061 Alu. alloy: 92 grams.

[bandaro]

awesome work guys, you know your stuff.

Does anybody have a 60t htd pulley for the 5mm pitch? im thinking that would be stronger than epoxy teeth on a disk.

again, any format should be fine, and the #40 chain sprocket above works perfectly.

kk, thanks guys, much appreciated

[Miles]

You can download models from SDP, but the tooth profile may not be correct...
https://sdp-si.com/eStore/PartDetail.as ... roupID=217

[bigmoose]

Lyen 18 FET Controller:

lyencontrollerassembly-v1.jpg (59.9 KiB) Viewed 924 times

Here is the step file in a zip container:

LyenControllerAssembly-V1.ZIP

(78.09 KiB) Downloaded 35 times

EDIT: Reloaded files from server migration crash.

[Doctorbass]

Reserved for the Giant DH comp E-conversion CAD

Credit to Bison_69.

Doc

[markobetti]

Anybody have exact dimensions or 3d model of front freewheel : http://www.sickbikeparts.com/catalog/pr ... 01no6j3e11 or any other company front freewheel ?
I am designing front bbracket right now .Thanks !

[Bison_69]

To all E.S. members,

Which gave me so much help on your forum with your technical knowledge; let me now give you in return some open source SolidWorks drawings I have made in the past until now? Those parts are regarding bicycle parts, EV and some electrical components (e-bike)...

Since I have many files... the list would be too long to enumerate then you are welcome to search on this link below (hopefully it works)
http://www.mediafire.com/?595a3424umwdc (Drawings and Torque arm parts have been revised)

I also recommend you using the free SolidWorks viewer: (download and install)
http://www.solidworks.com/sw/support/edrawings/e2_downloadcheck.htm
***Just as a reminder - all those parts must be reviewed for your special need and measurement ***

I won't list the fasteners since they are available and free on the McMaster website (there are many CAD versions over there as well)
http://www.mcmaster.com/#

Special Thanks to DoctorBass and Maxwell65... which inspired me and so many others.

And also all of you genius... devoted members you are very kind to help us (beginners)

SG

[Danny Mayes]

Thanks Bison, lots of files there...

Here is a model of a 80-100 in solid work format.

It was kindly donated by Stielz. (his neat project here - http://endless-sphere.com/forums/viewtopic.php?t=28463)

It is missing the spindle, so you will have to put your own in.

It is a part only but with a lot of detail.

Thanks Stielz.

D

[Bison_69]

Hi Guys,

Here is a new link for you... the site is called GrabCAD and offer free sharing 3D files from many drawings softwares.

http://grabcad.com/home

I also discovered lately a very nice application for universal rendering called KeyShot... very easy to use and outstanding finish effects.
http://www.keyshot.com/ (easy to find for free on the web)

I am now a GrabCAD member and I have uploaded many files over there... http://grabcad.com/sg/projects

Have a good day!...

[bobc]

How to draw a chain sprocket
to make a dxf file to take to the laser cutters, for example -
might save someone the trouble of looking it all up....

[amberwolf]

There are also some free programs out there that will do it for you. At least one of them even draws in the mounting holes at standard or custom BCDs. I cannot ATM remember the names of them, though I recall finding them easily with a google search some time ago.

[Miles]

Ref: http://grabcad.com/library/agni-motor-95r

[Kin]

If, for some odd reason, anyone with a Gotham Citizen 2 wants my torque arm file AND simultaneously finds this post,

I've been using a torque arm made of 5/8" O1 steel on both sides (decided on not hardening it, so as not to be so much harder than the axle.) There's ample leftover threadroom. The file could be *slightly* better by moving the hole down closer to the edge by a fraction of an inch. Also, you could cut a hundredth of an inch from the axle diameter, but right now it's at .393", and that's pretty decent. Plot-print and see for yourself. Works fine though. The nut whole is 6m x 1 (METRIC). My hole in the torque arm file is slightly oversized.

I use file format IPT, but these files are the converted IGS and STEP, which I believe to be wholly accurate, but yeah, be diligent and double check the file yourself.



I should add that on one side the torque arm has a triangle 2mm tall maybe 8mm long overhanging. This is because the dropout piece is slightly wider on one side, and I originally made a file for each side. I am only posting the file I actually used, which I ended up flipping for the opposite side. If your weld is exceptionally wide, then you might need to grind the edge a tiny tiny bit because I found one of the dropouts to have a slightly wider weld. The torque arm was originally made with epoxy in mind (hence, large surface area), but I added the bolt hole in the last second, because the bike already has a threaded hole there, so you may as well use it. You probably want ~13mm bolt, depending on how thick your bolt washer is. (a 6Mx1 bolt, of course.)

[TylerDurden]

Alibre Design on sale 50%

11/25/2012 -11/30/2012

http://www.alibre.com/

[alex12342011]

Infineon 9-Fet Controller.zip

Based off of personal measurements with a caliper.

(1.98 MiB) Downloaded 6 times