On 5/6/2013 1:03 AM, Danny D wrote:
Over the years, I've bought & broken and finally given up on
aluminum pool poles from the box & pool stores:
http://www1.picturepush.com/photo/a/...g/12834169.jpg

They bend:
http://www5.picturepush.com/photo/a/...g/12834188.jpg

They crack:
http://www3.picturepush.com/photo/a/...g/12834196.jpg

They kink:
http://www1.picturepush.com/photo/a/...g/12834209.jpg
/
They break:
http://www5.picturepush.com/photo/a/...g/12837748.jpg

My wife angrily threw away my prized yellow fiberglass pole
after the kids complained of splinters, so I am trying to build
a stronger/cheaper/more durable sliding steel pole out of EMT
fittings:
http://www3.picturepush.com/photo/a/...g/12834076.jpg

But I can't seem to get the fittings right.

Mainly I need a 3/4 to 1/2 inch reducer.

Have you ever created a sliding pole out of cheap but strong
(stronger than aluminum anyway) 10' EMT tubing?

What fittings would you use so that you could slide & clamp
the two ten-foot steel (EMT conduit) poles together?

I think you're barking up the wrong tree. The 3/4 emt may be strong
enough, but its too heavy. The 1/2 emt will bend way quicker than the
aluminum poles. The fittings you got look really nice, but none of the
electrical fittings are designed to be loosened and re-tightened
repeatedly. The fittings are also not made with the ability to telescope.