135mm double disc mount hub

Built a Pompetamine up just after Christmas with a bolt on Velosolo cog on the disc mount of my SS 29er wheels, but this means that a) I can't run a back brake and 2) my 29er doesn't have any wheels. There are only two solutions out there that I can see for fixed disc hubs - Phil Wood or Surly and both are over £100. I also really like the bolt on cogs, so decided to make my own:

It only exists on CAD at the moment, but I've done some rough 2D drawings and ordered the raw material, bearings and seals and hope to start making it next week

You could also do a double fixed cog with one of these disc mount cog things. Way easier and cheaper than reinventing the wheel and all.

Example:

http://urbanvelo.org/wordpress/wp-content/uploads/2012/03/broakland_disc_adapter.jpg

^^ Sweet! I'd be interested in one of these. ^ With that you have all the problems with traditional threaded cogs stripping, and double up at that (both the cog and the disc could strip).

Ted James has made some before

^^^ That disc adaptor isn't what I wanted at all. Besides, I like making stuff.

^^ But I don't like making stuff that much. I doubt there will ever be more than one of these. The hub shell is going to take me hours (I'm not a professional machinist...) and the lathe and mill are manual, not CNC.

^ Ha, that Ted James one is exactly what I'm planning, though his lathe is a bit fancier than mine. Nice.

^^ Sweet! I'd be interested in one of these.

You could always try a standard disc rear and then see if you can get a surly fixxxer. You'd still have a screw-on for the DS, but threaded cogs rant all that bad. I'm guessing it'd be pretty heavy and unless you've got the hub/wheel already it could be a bit spendy.

Any idea on the production cost of your hub, if you were to sell them on? I would be interested for my day one.

They're not complicated and the materials and bearings for one hub were just over £30 but I'm not taking orders. If I were to make them on the manual tools I've got access to each one would take several hours and I'd have to charge £200 or so. Even if I could get the parts CNCed they'd probably still cost over £100 each. Though maybe I ought to get some quotes and see...

Ha no worries just though I would ask!

Some big chunks of aluminium just arrived:

I'm somewhat interested in home made parts. I've been considering getting a lathe recently to make various things.
What lathe do you have?
What, if any, other machines will you use?

The lathe is a 12" x 24" 2HP Excel . Seems good enough and came with lots of bits. Cost around £3k new, IIRC. The mill is a Bridgeport we bought S/H, also for about £3k. It's got a rotary table with 3-jaw chuck, which will make drilling the spoke and disc mount holes much easier. The Bridgeport is lovely and if I could afford one and had the space I'd get one for home.

Bearings and seals:

Thought I'd practice on the easy stuff first - axle and bearing spacer done:

Looks like this when assembled:

End caps and hub shell next.

I would be quite interested in a singlesided disc hub for 120 spacing with allen bolts, do let us know if you decide on a price