How to attach freewheel to wrong side of wheel ?

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Feb 7, 2008
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Hi all

So two of the plans I may choose for the rear of a delta/quad [ yes still a mass of indecision ] need me to chain drive a pair of single sided rear wheels.

So no problem with left wheel , free wheel just screws on and away we go , however right wheel is harder as free wheel wants to be on the inside and NOT unscrew when pedaling ;)



So this is the only plan I can come up with so far that may work ?

On the left is a hub flange from another wheel with the thread for the free wheel to screw onto , coming from inside the threaded portion and the free wheel is a tube welded to the back of the hub flange.
When on the right of the free wheel a plate is welded to the tube.
The plate has 6 holes to bolt it to the disk mount in the hub of the wheel I am to use , which has a M14 axle.

Problems [ there are a few ! ]
Inner tube needs to go over nuts on M14 axle and be thick enough to weld
Free wheel will be trapped for ever - no servicing - will the welding burn out the grease ?
Free wheel will stop attachment bolts from being inserted after it is built - so they need to be hex headed and inserted before plate is welded to tube ?
this whole assembly will mean a spacer tube and nut will have to be added to axle to the left of this unit to allow this to be bolted up ?

Anyone have a better idea ?

Don't forget the mantra is :-
Built from standard bike parts
No machining
No specialist parts
Lot's of ingenuity

Paul
 
Joined
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What I did on the Mamboesque trike was to get a r/h threaded bb cup and grind the face off it, screw a scrap freewheel halfway on to a double threaded rear wheel and screw the bb cup into that until it hit the existing threads. I then welded it on the inside thus creating a longer freewheel thread. I then screwed the scrap freewheel fully on and screwed on the cup locking ring. The excess threads were then ground off. I replaced the scrap freewheel with a good one and tacked the locking ring in place.

The tacks only need to stop the locking ring unscrewing and the locking ring stops the freewheel from unscrewing. The tacks could be ground off for replacement of the freewheel if needed and using a scrap one for the heat generating jobs like welding and grinding preserves the good one. When welding the cup on the inside I just tacked it with the scrap freewheel on then took the freewheel off to weld solid so I didn't weld it too. I also had to take the top off some of the weld to get the axle nut on.

It did work though I never used the trike long enough to know if it would hold long term.
 
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Neat.
where you able to TIG it inside ? or did you stick weld it ?
Did the weld not interfere with the threads on the outside ?

Paul
 
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Mig and no. If you can get the torch in tig should involve less grinding to get the axle nut on. Thinking about it if you grind the excess threads off before welding solid you'll get better torch access.
 
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You know this maybe a stupid question [ stop sniggering at the back ]
However does your way not have the free wheel the wrong way around to work on the lefthand side of the right wheel ?

Paul
 
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Depends which way round you screw it on.
Sorry yes , I figured that out ten minutes ago walking the dog.
I need to see if a BB r/h cup can fit over a M14 axle , I like the idea of tacking the lock ring on.

Paul
 
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Thanks all for your answers , I am trying to make a 3 chain solution for 2wd ?
So either I attach the wheels to a jackshaft that sits behind the seat that is driven by 2 chains coming from the disc mount of a IGH , that maybe problematic getting the chains under the seat without pulleys ?

Or

Have the wheels [ with freewheels attached ] mounted by their M14 axles , 2 chains either side of the seat and the jackshaft under the front of the seat with a freehub/cassette driven by a single chain.

Using the M14 axles to mount the rear wheels saves more shafts and bearings = weight

Paul
 
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I put the BSA-adapters for the freewheels for both axles on the left side.

Thank you for replying so quickly.
What did you do to allow the axles to rotate while the backplate was held stationary?
How many fixing points are there on the SA drum-hub backplate?
Thanks in advance.
 
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Here the planning sketch. I hope the German lettering does not disturb. The brake plate is fixed to the wooden block via the spacer sleeve and the torque lever.

 
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Here the planning sketch. I hope the German lettering does not disturb. The brake plate is fixed to the wooden block via the spacer sleeve and the torque lever.

Many thanks Lotharko, jetzt ist alles klar 🆒
 
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Lotharko

Much appreciated , did you start a new quad with suspension ?

Paul
 
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The pictures shown here belong to the quad I built 3 years ago. There is also an album about it in the Builder's Gallery.
In 2020 I started building a second quad version, but it is still unfinished.
 
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