John Schwochert


Proto-1 Manufacturing LLC
10 Tower Road
Winneconne, WI 54986


Phone: 920-582-4491
Contact via email
notching options hole saw

Tube and Pipe Production | Articles

Notching options

April 26, 2010 | By John Schwochert

While most fabricators could probably name three methods for notching tube, they actually have six choices. Understanding the advantages and disadvantages of each is the first step in selecting one.

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marman bead.jpg

Tube and Pipe Fabrication | Articles

Making a 20-degree Marman bead

July 20, 2009 | By John Schwochert

Two forming methods can make a bead for an airtight seal on a metal tube: rotary (spin) forming and progressive ram forming. Each has advantages and disadvantages in bead profile, cycle time, amount of wall thinning, and so on.

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