large metal pulley

[shyland83]

Does anyone know where i can find something like this locally?

http://fasteners.hardwarestore.com/...-wheel-634992.aspx?CAWELAID=42529713#features

I would also like it to be cheaper If you haven't noticed i tend to go overboard when i do things. I am trying to make a tubing bender that will help me to make a 12"(or close) diameter coil with 3/8" titanium tubing. for the 60 bucks that is going to cost me i could probably pay someone to bend it for me. But i would like to try to do it myself. This pulley seems perfect, but i would at least like to see it in person before buying it. thanks

 

[cb747]

Had you asked me 2 weeks ago i would have had one that size off of a washing machine. I just threw it out 2 weeks ago after sitting here for a month Ill see if i can hunt something down at work.

 

[shyland83]

Thanks chris that would be awesome if you find something. What i like about this pulley is that it's made for 3/8" rope so the tubing might fit snug in the grooze which would really limit the chance of a kink. but i wont know for sure without seeing it and i'm not willing to spend that kinf od money. I assume something from an old washing machine, or even a car might work.

 

[shyland83]

I just looked up pics of washing machine pulleys and they look they could be pretty perfect. I'm going to have to start looking for washing machines in the trash.

 

[pyro383]

What about a conduit bender?

 

[Justjoe]

A clothesline pulley for hanging laundry outdoors?

 

[cb747]

Scott i havent found anything of use at work so far.

 

[puckbs]

you are out of your dam mind

 

[fishfiend00s]

Scott, I have a pulley thats larger then that EVEN HEAVER duty lmk if your interested in it.

 

[fishamajiggle]

or you could use a tubing bender for the right size
http://www.newmantools.com/imperial/tb3.html

i use this for copper bends every day
you can get it at your local hvac supplier

 

[shyland83]

The problem is that i want a 12" radius. I have a bender but it only makes a tight radius. I also have a spring bender, but all that does is make the bends little more even and prevents kinking.

I think i am going to cut a 12" disk out of 3/4" mdf. Then i'm going to route a 3/8" half radius all around the perimeter. That will give me a nice snug groove and a nice round 12" radius for the price of...... Free

 

[shyland83]

And fishfiend, thanks for the offer. But i actualy want to keep the radius around 10-12". And i really want something that the 3/8" tubing will fight in tight to prevent kinks.

 

[shyland83]

So here is the Bender i am trying to fabricate. My plan is to attach the small block to a long strip of MDF about 3 feet long. Then i will drill a hole in the center of the disk and through the long strip. I'll put a bolt through the hole so i can spin the handle and it SHOULD bend the tubing nicely around the 12" disk.

2 problems.....

I'm trying to figure out how to perfectly find the center of the disk.

And once i go 360 degrees how do i start the second coil. I'm hoping i can pull the first half of the bend out of the channel and just keep going. we will find out.