Columbia chainless parts

[Barnegatbicycles]

Today I started working on making some Columbia chainless parts. I will be making some axles, rear gear adjusters and nuts for the adjusters for different model Columbias. The adjusters and lock nuts for 98 -02 are the same but the design changed slightly in 03. I am making some of both styles for my personal projects and figured I would offer making some to anybody who needs these parts. If you are interested shoot me a private message and we can go from there.

 

[Barnegatbicycles]

Final product.

 

[catfish]

Nice work.

 

[Barnegatbicycles]

Finished up making a jig for the next pieces I will be making. The piece that mounts on it is the brake actuator out of a 2 speed Columbia chainless hub.

This jig will go into a dividing head on my milling machine and allow me to mill the ramped slots on the parts consistently from piece to piece while only having to remember the 4 different positions the slots are at. Without it I'd have to spend a bunch of time aligning and doing math everytime I wanted to machine another one.

 

[bud poe]

This is cool nice work, machinists make the world go round

 

[mike j]

Really nice job Matt.

 

[Barnegatbicycles]

Finished up some blanks for the 2 speed brake actuators.

 

[Barnegatbicycles]

Partially milled:

 

[Barnegatbicycles]

Finally got back to this and machined up the ramps. Here's the jig in action and a rare view of the internals. Next step is to cut the grove that holds the oscillator controller and make them.

 

[Barnegatbicycles]

Spring clip made and everything is heat treated. Fits like a glove. Onto making the little stub axles and foot pegs for the brake side.