On 3 Apr 2005 10:43:19 -0700, "Davey O"
wrote:

===
===Mark wrote:
=== What do you want to do? Solution and age? Anneal? What grade(s) of
===
=== aluminum. What sized parts?
===
===
=== "Davey O" wrote in message
=== oups.com...
=== Im interested in building a heat treatment oven for Aluminum. Can
=== anybody give me some insight?
===
===
===thank you for responding. I would like to straiten Al "shafts" used in
===underwater spear fishing. The impact with the fish often causes the
===shaft to bend. I beleive the avenue I wish to follow is annealing. As
===far as grades I can not say because they vary. I have always wanted to
===build one of these; Maybe designed to accomodate other types of metals
===as well. Any suggestions or concerns? thank you. -Davey

Aluminum shafts for spear guns....never seen em. All I have ever seen
were some el cheapo galvanized steel and the better ones were always
stainless......I seriously doubt the impact of a spear hitting the
fish is the problem if your bending spear shafts. Your tip is what is
doing it. Are you using a fixed in place on the shaft tip or a slip
tip. When you use a fix tip, and do not make a clean kill and work
your way to the fish and grab the shaft, thats when it gets bent. A
slip tip will penetrate through, and still be connected with a steel
cable to the shaft forming a flexible portion, so bending of the shaft
is not possible. I have speared some Greater Amerjacks in the 60 to 80
pound class with slip tips and a 5/16" shaft and never bent one as
long as I used a slip tip. Before that I used to bend up a heap of
shafts on every dive, when I used fixed tips.

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Put some color in your cheeks...garden naked!