That's more like it...

So the South Bend Heavy 10 is in the shop and she’s been put back into service. “Rescued” as I like to say. She’s been making chips. First couple projects were updating a bunch of purged heat sinks. The more I build, the more I look to refine my process. These are the result of building, using tools and then modifying them or creating work arounds in the mean time. Well, now that I have a lathe, I can start expediting these process refinements. First up was a set of head tube heat sinks, purged and meant for 44mm head tubes. I use Paragon Machine Works head tubes which come in a variety of lengths. I have one existing 4″ heat sink but that only really goes up to 4-4.5″ head tube lengths. So these two new ones are for 5″ and longer. They meet in the middle, and then can be moved apart from each other. Their lengths allow for good heat reduction and argon coverage where the tubes sit. Here’s a few process shots.

I like my parts round...

A drilling I will go

Closer...

Face

Moe, Larry, Curly...

And some assemblies:

Guts

Keyed in place

44mm Head Tube Heat Sinks

Call these done.  Finally

As can see the two which sit flat are keyed simply with a small socket head cap screw which locks the stainless cone in place. The Acme threaded rod has a machined and tapped end cap which is brazed in place to accept a small air hose fitting. The acme rod is drilled with well placed vent holes to allow the argon purge to flow. The smallest of the three which you can see in the above “exploded” view, is a Tapered Steerer heat sink for unicrown forks. Last but not least was making a true 100mm bottom bracket heat sink.

Slow progress today...

Untitled

It’s kind of comical. Now that I do have a lathe, I find myself constantly using it. Heck just yesterday I had to modify a tapered plug purge fitting as it was a tad to big for a seat tube. Determine the taper, set up the lathe, chuck up the part and take down the taper a touch so it would fit. It’s little stuff like that which keeps the ball rolling but I couldn’t have done it quickly without a lathe. Makes me wonder how the heck I was doing all that I was without one! Next project? I’ve always wanted to make my frame jig standoff’s longer so I have more room around the bottom bracket area and seat tube/head tube joints when tacking. Material is on the way. I’ll be down for about a week but I think modifying the jig in this fashion is worth it. Till then…