Ok, here's a question for the nerdiest of the nerds;
What kind of rod do you use to make rotary valve control arms? I've been using 625 German silver, but I'm wondering if there's an alloy that is more rigid. For example, I've been researching an alloy called Invar 36, that has steel in it.
I will be using Dubro 4-40 ball sockets, so it will need to be threaded easily.
Rotary valve control rod
- roweenie
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Rotary valve control rod
"Even a broken clock is right twice a day".
- roweenie
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Re: Rotary valve control rod
Of course, why didn't I think of that
Actually, I experimented with threading the rod to 6-32, and tapping the ball link to match, and that gives the rod a little more strength, especially considering that the threaded part of the rod where it enters the ball link receives a large amount of the torque.
Actually, I experimented with threading the rod to 6-32, and tapping the ball link to match, and that gives the rod a little more strength, especially considering that the threaded part of the rod where it enters the ball link receives a large amount of the torque.
"Even a broken clock is right twice a day".
- Dan Schultz
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Re: Rotary valve control rod
I have a box of stuff salvaged from saxophones I've parted out. I don't know what those long sax keys are made of but they are some tough stuff and lend themselves well to brazing. The hollow ones are great for fabricating tube and rod hinges.
Dan Schultz
"The Village Tinker"
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Current 'stable'... Rudolf Meinl 5/4, Marzan (by Willson) euph, King 2341, Alphorn, and other strange stuff.
"The Village Tinker"
http://www.thevillagetinker.com" target="_blank
Current 'stable'... Rudolf Meinl 5/4, Marzan (by Willson) euph, King 2341, Alphorn, and other strange stuff.
- roweenie
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Re: Rotary valve control rod
Is it common to use drilled rod for this application? All the ones I've made use solid rod. 1/8" seems to be the right diameter, though.
For the lever parts, I like to use 7/32" (5.5 mm) or 1/4" German silver rod stock.
https://imgur.com/gallery/vKHldam" target="_blank
For the lever parts, I like to use 7/32" (5.5 mm) or 1/4" German silver rod stock.
https://imgur.com/gallery/vKHldam" target="_blank
Last edited by roweenie on Thu Nov 21, 2019 2:31 pm, edited 1 time in total.
"Even a broken clock is right twice a day".
- roweenie
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