Clock Wheel Crossing Out Jig

[raynerd]

I started making this jig the other night and it should be finished in the next few days. It is used to mark out for crossing out clock wheels to form the 'spokes'. I had previously done this on a milling machine and it is no coincidence that the two clockmakers that saw my wheels commented on the lack of taper on the spoke. I'm sure I could do this with the rotary table and the mill but I fancy giving the traditional hand sawing a go:

[micktoon]

Hi Chris , nice to see you posting again , the clock wheel looks good but I still can not really work out what you are doing spokes wise , can you explain a bit more please for us none clock wise types  I look forward to seeing the hand sawing.
  Cheers Mick.

[vtsteam]

Yes looks wonderful, but......I don't really know what it does......  

[raynerd]

   let me finish the pegs and I'll explain how it works!

[micktoon]

Oakie doakie  Chris  , 

  Cheers Mick

[dsquire]

Chris

What's the story on all this?

First there were fish.
Then came a clock wheel.
Now we've got some spokes!
Does that mean we get a fish ladder?

Inquiring minds would like to know.   

Cheers 

Don

[raynerd]

Ok, a little more done and this should show how it works. It's nothing mind blowing, just a simple jig to quickly cross out wheels.

So I've turned up a few stubs and pins but I need to turn up more, the idea is you build up a collection as time goes by so it isn't something you need to keep doing.



The wheel is mounted on a central stub that is tight fitting:


There is a tiny centre pop in the centre stub to mark out the inner centre and outer rim:


Then if you want 1/8" spokes, you machine up two 1/8 pins, put them in the appropriate dividing holes and mark up.




This can easily be done marking out in other ways but it's fast and I hope to maintain an interest in clocks, it should be a useful tool. The real benefit is that using different size pins, you can achieve taper on the spokes... More pics to follow.,,

[DavidA]

And suddenly the light dawns upon me.

What a good idea.  You have just saved me a lot of time when it comes to making my loco wheel from the solid.

Thanks,

Dave.

[DavidA]

Got to admit that  I was a little confused at the beginning as I always associated the expression 'crossing out' with the actual filing of the spokes.

Dave.

[micktoon]

Hi Chris, thanks for posting, its seems to be one of them things that is so simplebut effective, yet you know you would  never havecthough of it yourself lol.
  Look forward to seing more photos of tapered spokes too.

cheers Mick

[raynerd]

David, you are absolutely right and I am wrong to call it a crossing out jig, it is a marking out for crossing out jig!

Mictoon, I need to build a little box for it - a need a wood working tutorial!!!! :-(

[vtsteam]

Well that's pretty cool! 


So the peg holes are just centered on the diameters, and the peg diameters determine the spoke widths.

That would work for flywheels, too.

[raynerd]

Hey, only 2014 when I posted this but made a video for it a bit ago when I was tidying the workshop. A local guy I showed it to made one for fly wheels.