Thread: straight axle

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I've never made one for street use, but many for drag cars. I use 1 1/2 X .250 chrome moly. I think 2" would be a bit large, if you want greater durablilty i'd stay at 1 1/2 and maybe a .500 wall (that is what i use for the kingpin bosses). They are quite simple to build, a piece of boxtubing drilled to accept the spindle parallel to ground is all you need, machine your kingpin boss and put it in the spindle with the kingpin and weld the axle to it.
The pics show a piece of it. I have different ones at different heights. It is used here to hold a model 'a' axle while i am building the suspension stuff. The box tube is clamped to an 1 1/2" tube that i clamp to the frame jig, the holder is shown in the other pic and you need two of them. Very simple pieces, the spindle nut holds them tight so you can set caster too.