Quote:
Originally Posted by diamond
For those that made their own, do the 4 holes drilled on the face and/or the 2 holes in the base need to be threaded? If so, what did you use to do that? Also, I have scrap 4"X4"X3/16" steel tube that I hope to use. Any problems with that idea?
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I think HSS4x4x3/16 is probably too small if you are going to use the throat dimension shown on the drawing. The plans call for HSS6x2x3/16. The loss of 2" of depth is pretty significant. Even using the 6x2 there is significant deflection in the frame when dimpling.
If I was going to try the 4x4 I would use 2 pieces at the back of the frame effectively making the vertical tube 8x4. I think pinning the back of the tube in a more rigid fashion would help minimize the deflection you might otherwise encounter.