D and C Can Slug Sizes

[Slik]

Monty,

What type size D and C can bushing alignment slugs should I buy to build my weekly racing motor setups...?

Also, how about different size hood alignment tools? Thanks...

BTW - Anyone who races in big races, Monty can build you some good stuff ;)

[Monty @ B.O.W.]

Rob,

My C can sizing tool was made by a racer friend. I've seen several brands marketed that do the same thing, though. It needs to be steel, .835" across the round sides, and .560 across the flats.

I don't have a D size tool, but if the Kelly D cans are anything like their C cans, I'll need one soon (Ian, you reading this?). The dimensions are listed in the USRA national rulebook under D can motor specs.

I can't imagine why you would want brush hood tools of varying sizes, since all premium slot car motor brushes are the same size (.110" x .125"). Mine is a FastOnes with diamond grit on 2 sides. Look to make sure the holes are reasonably centered.

[Slik]

Monty,

What about mag slug sizes for d cans and c cans, thats kinda what I ment... to align the bushing.

Now question, for the c can tool sizes you said above, what size mag slug works best to align the bushing, or do you have a precision drilled hole to align the bushing to the can? Amd then align the mags to that and so on.

[Monty @ B.O.W.]

Rob,

If you do much building, you'll find a use for several sizes depending on the brand of can. I use .535" as often as possible, but find enough variation in Kelly cans to demand a few slightly smaller ones. I have them in .001" increments down to .532.

I don't have any for D cans, because I haven't been reworking the bushing journal (thats the hole a bushing is installed in) for D cans up til now. The new Kelly can, like its smaller brother, is gonna need straightening, so I'll ream the bushing hole up about .015". I anticipate setting the gap at about .580" in most cases.

On C cans, after beating or pressing the can straight around the steel form tool, I use an aluminum form fitted with a shaft to center the bushing in the enlarged hole. Then, the magnets are installed using a steel slug. If the can is oversized, this will pull the magnets away from the can to set the gap. If the can is not oversized, it doesn't matter what the slug is made of, but use the largest that will fit.

Ian, looks like I'm gonna need both steel and aluminum form tools! Also a .580" slug, and a .575" slug to use as a go/no go guage.