SOHC.co.uk Forums > CB350/400
Rear disc conversion
allankelly1:
--- Quote from: Oddjob on October 20, 2021, 02:55:33 PM ---I'm wondering that if you have access to a 3D printer why not just do an entire hub, saves any chance of something coming adrift under braking.
--- End quote ---
Wish I could but I can only print plastic parts
To be honest it all bolts together like a normal disc brake assembly and just assembly everything with a bit of blue loctite
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allankelly1:
Ok
Quick update for those following
Correct disc arrive today and bolted it to the revised disc carrier ok
All the off sets with the wheel in place look spot on and plenty of clearance for the caliper now I can place it over the disc itself
Next job is to turn the disc down to 230mm from the current size so it is a match for a Cagiva Mito rear disc (and the pad width then will match the discs face width and then I can start the design of the caliper hanger itself)
Once that is sorted will update the thread and then I will commit to finishing the rear wheel with aluminium production parts with the additional seals and bearing etc
Catch up again soon
Best wishes Al
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allankelly1:
Hi Oddjob
Yes I would be totally happy to model up a complete hub in SolidWorks but the crunch is the cost for a billet hub
To the cost to have a hub made from a single billet would be I estimate to be at least £800 -£1000 or maybe more based on the one off parts I get made by my local suppliers for work projects
I did look around for an alternative 36 hole rear hub that carries a disc as standard but then you still need to sort out correcting the chain alignment ensure correct bearings for a 17mm axle bolt correct spoke length etc etc. and again prices start around £200 plus
Due to my access to mill lathe etc and my time is free total for this project for the bought in parts is minimal and I estimate when all done will be no more than £150 all in and the the additional carrier means no major modification to the current wheel
Catch up again soon
Best wishes Al
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smoothoperator:
Following with great interest, I haven't worked out what your going to attach the caliper to yet. :-[
allankelly1:
Going to make up / design a caliper “hanger†that fits the rear wheel spindle and then hold the caliper out at the correct distance a bit like this example where the wheel spindle past thru the big hole furthest away fro the caliper
Here is the same type of set up on my hybrid I am building that is currently under a dust sheet as the little CB400F has stolen my
Then a torque arm will run from the hanger to the original torque arm mounting point on the swing arm
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