alventures wrote:

Dear Al,
Earl's catalog has the proper tool for this, fits inside the tube and

then several ball bearings expand out as it is rotated

forming a perfect radiused bead. Sizes from 3/8"-2" with walls from

.035"-.065"

...Chrissi

I called Earl's in Long Beach, and they still make the tool.  Current
price is $89 for each, 1 1/4 and 1 1/2".  The guy I talked to said that
he personally had used it on 6061-T6 aluminum, .058 wall; and it worked
fine.  Let's see now... would he be unbiased?  :)

Al

 
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