Maker Pipe - Page 2 - Mountain Buzz

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Old 1 Week Ago   #11
MT4Runner's Avatar
Kalispell, Montana
Paddling Since: 1997
Join Date: Apr 2012
Posts: 3,062
Aluminum set screws sound like an absolutely horrible idea!

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Old 1 Week Ago   #12
portland, Oregon
Paddling Since: 1998
Join Date: Jul 2010
Posts: 14
They may not exist except in my uneducated imagination. I now realize that aluminum Hollaender fittings have steel set screws and they say they work fine on any pipe- aluminum or steel.

I stripped an oil pan on my wife's Jetta once because the pan was aluminum and the drain plug was steel. I'm sure I overtightened a bit but still, that seems like a terrible design choice.
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Old 1 Week Ago   #13
Evergreen, Colorado
Join Date: Jul 2008
Posts: 186
I thought about a table with these. Something like this:

Although I haven't actually done it.
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Old 1 Week Ago   #14
Electric-Mayhem's Avatar
Lakewood, Colorado
Paddling Since: 1993
Join Date: Jan 2004
Posts: 1,476
Originally Posted by tmcrude View Post
Thanks. Looks like 6061 is sold in 1/4" O.D. increments and then each O.D. has various wall thicknesses? Hollaender fittings say their 3/4 size fits 1.05" O.D. tubing so does that mean you use a 3/4" fitting with 1" 6061 and get a tight fit despite that 0.05" discrepancy?

Also, I assume it would be a bad idea to use a steeltek fitting (stainless set screws) with aluminum tube? Wouldn't the set screw just dig into the tube? Maybe that would still work?

How about vice versa? A fitting with aluminum set screws into steel pipe or conduit?
Hollaender fittings use pipe sizing. You should be able to find aluminum pipe... so just get 3/4" Schedule 40 Aluminum pipe.

I'd generally stay away from mixing materials but I'm pretty sure that the Hollaender fittings use 304 stainless steel set screws ( ) so it could be assumed that that an aluminum set screw would be fine with that...but that sounds expensive. If you were gonna use a more common steel and aluminum together, I'd at least try to paint the parts that touch so you don't have to worry about galvanic corrosion. Probably not a big deal as long as you keep an eye on it and take it apart and clean it occasionally...but it certainly wouldn't hurt.

Last year I made a frame with 1.25" 6061 tubing and Hollaender fittings and it was light enough to toss around pretty easily and did a great job.

I sold it when I sold the mini-max it went with. I think ideally I would use bends at the corners instead of fittings...but it did the job. Probably lighter to just bend a frame up and weld it...but there is something to be said for modularity and the ability to break it down. I used those fittings and tubing to make a trailer frame for my cat this spring too...and regularly moved the bars around to fit different coolers and dryboxes too.

I imagine 3/4" might be kinda skinny for rafting use...might consider 1". I know the 1.25" stuff didn't feel overly bulky and it works with all the NRS accesories and many from DRE and others.
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