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South Bend metric transposing gears

DavidR8

DavidR8

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Just ran across these folks on the South Bend Facebook forum. Apparently they make metric transposing gears for the South Bend 9 as well as 'silent' gears for South Bend 13.
https://www.thegearmaker.com/gear-making/

Not cheap...
"Right now, they are $384.95. Not sure if we will be able to keep them at that price point in the future. They are in our web store and on eBay. Feel free to email directly"
 
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Wow that’s pricey! I’ll have to look at getting the 4th axis going and trying some gears.
98C65CD9-7272-43D3-95BE-1373951F6D07.jpeg
 
I was mildly interested till I got the price. I have a horizontal/vertical dividing head and I'd rather try and make them than drop $400+ CDN on them...
 
At one time you could get transposing gears for about 50£, at either arceurotrade or rdgtools. They don’t show up any more tough.
 
Mr Pete (Tubal Cain) made 3D printed gears for his Craftsman/Atlas or Clausing/Atlas and was impressed by their durability.

If you would like to give it a try, and you don't know someone with a 3D printer, I would be willing to print them if you cover the cost of materials. Ran the software, and it came up with $3 for a 62 tooth gear.

If it is special size I can also design the gear for printing. (I'm not sure just exactly what you need, but at this price it's worth a shot!)

If you have or know someone with a 3D printer, just do a search on Thingiverse.
 
I have an Ender 3v2 so I’ll have a gander through Thingiverse and see what I find.
 
Do you do design work? If not, and you need something special, I am willing. Enjoy having projects I haven't done before.

I use Fusion 360.
 
Thanks Tom, I do a bit here and there but pretty basic stuff in conFusion360 :)
 
Fusion 360 has a feature where it designs the gear for you.

If you enter the information as shown in the attached screen capture, you are off to the races. Might take a couple of prototypes, (for things like backlash) but pretty sweet.

You can find it under "tools" and "Scripts and Add-ins" and scroll down to "Spur Gear". Run the script, enter the data, extrude and you are done.
Screen Shot 2021-05-13 at 7.17.27 PM.webp
 
Johnwa said:
Just tried it, and it works!
Click to expand...

What scripting options did you use? Seems you had to select a language, create, import, yada yada yada. Eventually there was a run option, selected that and boom crashed. And there were two spur gear options listed in the scripting drop down????
 
Yes there are two options. They are a Python script and a C++ script. Either will work. Then next option after choosing one (they work the same) should be run.

And it SHOULD be that simple. I chose a script the last time, not an add-in. Maybe that's the difference?
 
Tomc938 said:
Yes there are two options. They are a Python script and a C++ script. Either will work. Then next option after choosing one (they work the same) should be run.

And it SHOULD be that simple. I chose a script the last time, not an add-in. Maybe that's the difference?
Click to expand...

Ok, worked second try. Cool.
 

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Maybe you should model your 28T shaper gear we made and compare it the the actual specimen. Also, for comparison, model one with 20*PA and one with 14.5*PA and see how much of a difference there is in the tooth form on that size gear.
 
I love that you can change things up quickly and print a prototype. On something like a gear I would print tough thickness with very little infill and see how it fits. One thing I have found, however, if you need to use the same print resolution. Printed in 0.3 will give you slightly different dimensions from 0.2.
 
So where does a person get the gear data?
(3D printer is tied up for the next while printing router parts but after that...)
 
Are you talking about something like this?

https://www.ebay.com/itm/124387115378

There is lots of information there, and if you are making a full set that need to work with each other, I would think you just make sure that you use the same pitch on all the gears and they should work fine.

I would be tempted to use the Fusion default settings and see what happens.
 
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