1st. thanks for the props. to answer a few questions & clarify some stuff.
12mm shaft options: I will make a few "metric" versions of the units for the over sea's crowd who may want to give these a go.
#25 over belts or 219p: since the #1 parameter is lowest cost possible, I havn't found anything as cost effective. belts have some strong arguments just on the zero maintance point....but belt tension reqiured on sometiong this size gets to be a burden on the 10mm bearings in smaller motors....& they cost as much a 3x more.
Drewjet- What is your #1 beef with your primary reduction? (& your stuttering a little bit today
(on my bikes i will prolly have sensored controllers....but i am definatly chomping at the bit to test my 16cell thundercat
Tensioning the chain: I have optomised the center 2 center distance to keep the proper chain tension for the sprocket set. A simple slipper guide will be all thats required to compensate for any wear during the life of the sprockets & chain. More pictures of it when it gets there.
Unit slipping on seat tube: these will be bored specific to the orders seat tube diameter. I have never had a proper fitting clamp like this slip under strain. But if for some readon some one would want to "pin-it" to the tube there is ample stock in the area for it. I have made a few clamping motor mounts for guys now (lurkers mostly) & not 1 has had an issue with the fit or slippage....(one guy didn't like that he scratched the paint on his down tube LOL)
External hall sensors: the photos are kinda poor. I was holding the 6374 with one hand in position & the 80mm motor was dangling from 1 screw. here is plenty of room for a specific hall bracket which will be available shortly after getting a few of these stocked.
This will work as a right or left side dive, or even a bottom bracke drive. The smaller clamping 1/2 of this uint can be used in a pair to provide 2nd stage of reduction. simple simon.
I really think a re-wound & terminated 80/85 would make a awsome BB drive set up & I will test that on my old FS Marin some time this summer.
Right now the big decision is to build or not a custom sized tourque limiter (incorperated into the main shaft) I have all the friction materials in hand & am picking up some stock this afternoon to make the prototype.
For the guys with a lathe & the ambition I will sell raw castings to play with also.
sneak peek priceing is looking like:
basic unit, bored to fit your tube with 4-1 reduction & a 30mm freewheel adapter $160.00 + shipping.
add the slipper & we are at $220.00
Do I need to provide 1 stop shopping for sprocket adapters to the rear wheel? I don't see myself getting into the RC controller sales buisness. I allways bargan hunt & cost compair with shipping figured in & often multi-source on stuff.....but I know some guys just want to get it over with.
I don"t plan to be 100% in the bike buisness, but I need to generate some soucre of funding to justify the race bike builds. I am filling as an LLC to get the tax benifits of operation working for this "hobby" business. I will add a link to a web site i have when i get the time to add proper info. Once I have a new Tax ID # I may be able to get some better pricing on materials also....win win.
(then i promise to not spam this section ever again LOL!)
Other things I have on the table:
external hall mounts,
disc brake to kart sprocket adapters.
freehub to sprocket adapters
splined crossfires for freehub attatchnment
Sealed battery boxes in fiber glass.
I am also re-working my home shop set up & attempting to get my (damned) cnc cutting metal in a satisfactory manner....that (IF, Maybe?) will get the 2-speed tranny's into a little quicker production. Those are a set up & parts fit nightmare for production.
(i am also building some motorcycle sized 2-speeds for testing in the next week....bring on the Perm132!)
I guess i just opend the door for a wish list.
thoughts? & thanks again.