I’ve started thinking about building a helve hammer when I get the time. I’ll start by doing the design drawings and that way I have some definite ideas in mind so I can collect potential components.
I began by studying the images I took of Bernie Tappel’s machine and making a parts list. Next I did some searching for other design variations. Eventually I’ll put something together that seems to best suit my needs.
The following list if some of the things I found about helve hammers on the web which seemed must helpful to me.
Richard Ferguson’s Excellent post that covers almost everything about helve hammer physics.
Hathorns Helve Hammer:
Building the Metalshaping Helve Hammer (Air Power) By Joe McGlynn
BP0063 Helve Hammer by Irnsrgn
BP0159 Helve Hammer by Jr Strasil
Wooden Helve Hammer:
Dick Bear’s Helve Hammer
Home Made Tools - Two Posts:
Paolo Scordia’s mini guided bench top helve hammer
Tom Lipton’s post:
Spring Under Helve Design:
Operation of a Helve Hammer similar to the one Bernie Tappel made: