wavy lines on a lathe

A

AMMASHOOTA

Gary Gruber
kubotan 1.jpg
kubotan 2.jpg

I make this key chain / weapon for some of my friends. They are an enhancement from the original Kubotan made and marketed by my martial arts master Tak Kubota. His are made from plastic, mine from aluminum or brass. They are made from 4 pieces of brass rod. Three are single point threaded and screwed together. This permits me to insert the swivel for the key ring. The parallel finger groves are just an visual enhancement.

I do not have a mill. Is there any way I can make a wavy line (spiral) using my lathe? I thought about adjusting the gears for an 8 pitch thread, but I think that would put the spirals too close together. Ultimately I'd like to be able to put intersecting patterns to enhance the design.

If you have any ideas please let me know.
 
Maybe look at the different knurling tools available, might be a tool with the proper knurls you’re looking to produce.
 
Your lathe may have the option for changing the lead screw drive gears. If you change the ratios, you can get different feeds. Just remember to change them back when done.
 
My Master is Tak Euchi, similar but moves smoother and a little faster on the swing



aaaaaaahh
 
AMMASHOOTA said:
View attachment 25091
View attachment 25092

I make this key chain / weapon for some of my friends. They are an enhancement from the original Kubotan made and marketed by my martial arts master Tak Kubota. His are made from plastic, mine from aluminum or brass. They are made from 4 pieces of brass rod. Three are single point threaded and screwed together. This permits me to insert the swivel for the key ring. The parallel finger groves are just an visual enhancement.

I do not have a mill. Is there any way I can make a wavy line (spiral) using my lathe? I thought about adjusting the gears for an 8 pitch thread, but I think that would put the spirals too close together. Ultimately I'd like to be able to put intersecting patterns to enhance the design.

If you have any ideas please let me know.
Click to expand...

A "Rose Engine" can create just about an pattern imaginable.

https://www.core77.com/posts/91294/Jon-Sauers-Incredible-Rose-Engine-Turning-Patterns
 
alinwa said:
Looking at that, what seems to be a variation on the old "spirograph' iterations, I can't imagine a toolup which will allow for wavy lines on a parallel surface

I'd love to be wrong..... I could picture some wikkid barrel treatments ;)
Click to expand...

I think the easiest way would be with something akin to a 1 TPI. I'll play around with my gears and see what I can come up
 
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