Collaboration on a 3D printed threading dial for a SouthBend 9C

RWanke said:
I find that I do not engage right on the numbers or lines. It engages either right before the line or right after (about the thickness of the line away).
Click to expand...

That's exactly how mine works.....and I believe it is factory original.
-brino
 
When I made a thread dial for my Swedish lathe, the gear was attached to the shaft by a nut on the end and no key. Line up the marks with the gear engaged, tighten the nut and you're good to go. It hasn't slipped yet.
 
Resurrecting an old thread but finally got around to making an actual threaded part using your thread dial Brino. I made a plug gauge to match my lathe spindle to help gauge the internal threads I plan on cutting on the ER-40 collet chuck I'm going to attempt. Thread dial performed flawlessly. I never did "highlight" the numbers or lines on the dial as I have had no problem reading them as is. Thanks again Brino for what would have otherwise been a very expensive factory original part to buy.
IMG_6861.jpg
 
@RWanke,

Great! I am very glad to hear it works for you.
Thanks for the feedback.

-brino
 
Printed parts I have painted soak paint in like a sponge. That makes having a crisp line imposible.
To get around this I clear coat first and let it soak it up till there is a layer of paint on the surface.
Once that's dry, painting on the clear coat layer goes normal and crisp lines can be made.
 
Also wanted to mention "Wax filament" for casting. https://www.machinablewax.com/
looks very interesting and would be much better than lost pla casting.
Sounds like it prints nice also. I haven't gotten any yet but it's on my radar.
 
Can any one of you gentlemen provide the specs for the gear. I would like to make my own in brass but do not have a gear to copy.
 
frankly2 said:
Can any one of you gentlemen provide the specs for the gear. I would like to make my own in brass but do not have a gear to copy.
Click to expand...

I will try to help.

The original model came from here:
https://www.thingiverse.com/thing:1306037

........but all they say is:
The lathe has a 3/4 8 TPI acme leadscrew, the chaser gear has 32 teeth.
Click to expand...

You could download the model and open it in any CAD program that supports opening *.stl files.
I use:
1625619859878.png


from here:
https://www.3d-tool.com/en-cad-viewer-download.htm
.......but it looks like the new free version is only has a two week trial period.

It gives you the ability to measure the stl model.

Here's what I get:
1625620297884.png



That's 34.360mm across the top of the teeth, and 30mm across at the root.

The teeth are NOT 90 degrees to the flat end of the gear:
1625620800939.png



The toothed part is 10mm thick:
1625620969155.png


I hope that helps!

-brino
 
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