need a machinist- small job

[mack_turtle]

anyone have access to equipment to modify a small aluminum part?

[notyal]

Depends on the type of modification you're looking for, but... I might have you covered.

 

[Yosmithy]

If you can post up the part you need done, I can see if it's something I can handle. I have a lathe and a Vertical milling machine, but a limited amount of tooling at this point.

Note; I've been called a lot of things, but "machinist" is not one of them 🙂

[mack_turtle]

here's a super high-tech rendering of what I need to do: drill/ tap a third hole in the sliding dropout about 10 mm in from where it is, then remove the additional material from the mounting tab. I need to at least drill and tap that hole with enough precision to get the bolt in straight. I am basically trying to shorten the mounting tab so that I can slide my axle forward enough to remove a link from the chain. (cue long debate about chain stay length. spoiler: I want mine shorter, because.)

you can see that the Paragon equivalent (blue background) has a much shorter tab, so it should be fine. my frame has room for 3" tires, and I am running 2.25-2.3's, so there's plenty of room in the frame. if needed, I can shave some material off the axle mounting area to clear the dropout part as well.

Edited September 27, 2018 by mack_turtle

[Yosmithy]

yeah, I can probably do that. What's the time frame?

[mack_turtle]

thanks Yosmithy for making this work! of course I can't test this out much because of the rain (or perhaps the rain is because of my desire to test it out), but I now have a frame that was designed with a 17" chainstay length at 16.5". This does not allow me to use a tire much bigger than 29x2.25, but it's at least I can try riding with a low BB and short CSL until I dial it in. I even went out and bought some shiny new stainless bolts for it.