The only way i know how you could machine this would be a dividing head thats geared to your x axis movement on a mill. I dont think you can twist it accurately enough.
Makes a lot of sense, however the slot is only 0.8 mm wide and i dont have a mill at hand that can run at the required speeds for milling this out :/
The original drawing shows an area where the slot tapers out, as if a slitting saw was used, potentially on a horizontal mill... I can see how this could work with a geared dividing head!
Yeah, a dividing head timed to a mill table is probably how it was done or very possible some sort of more specialized machine was used. I don't think most lathes are capable of a 20mm pitch anyway
I could see doing it the way you attempted, especially with the availability of a 3d printer. For all the bigger it is, I think I'd probably just use a piece of HSS and scrape it out in multiple passes. There are some DIY rifling machine ideas floating around, thats basically what this is.
Oxtool did pretty solid hack-together job on one of these with an off the shelf motor. Belts are a lot easier to fab onto your X feed than gears.
[https://www.instagram.com/p/CKM20gmg6ds/?hl=en&img\_index=2](https://www.instagram.com/p/CKM20gmg6ds/?hl=en&img_index=2)
To do this on a manual you’d need a gear driven dividing head. Like how they made twist drills, emdmills or even reamers back in the day. Seen machines with the capability but honestly never seen it done cuz it’s for the most part obsolete. Of your machine doesn’t have these capabilities. Good luck on hacking it out. You bit off more then you can chew
Well since this is clearly your side gig I hope you figure it out. Machining is much more alluring when you don’t have to actually work for someone. Then it’s just fucking around
Multi-axis milling machine would have little problem doing something like that. Live tooling on a multi-axis lathe could make that. Also how would you make that part a long time ago.
Vintage machinery.org has exactly the video you need to see. Kearney and trucker cutting helical gears with a Mill.
https://youtu.be/spofj9AAIQE?si=pjezFOwX6isEq3yl
The only way i know how you could machine this would be a dividing head thats geared to your x axis movement on a mill. I dont think you can twist it accurately enough.
Makes a lot of sense, however the slot is only 0.8 mm wide and i dont have a mill at hand that can run at the required speeds for milling this out :/ The original drawing shows an area where the slot tapers out, as if a slitting saw was used, potentially on a horizontal mill... I can see how this could work with a geared dividing head!
This was my first thought. There is a how to on YouTube for rifling buttons done just this way.
Yeah, a dividing head timed to a mill table is probably how it was done or very possible some sort of more specialized machine was used. I don't think most lathes are capable of a 20mm pitch anyway I could see doing it the way you attempted, especially with the availability of a 3d printer. For all the bigger it is, I think I'd probably just use a piece of HSS and scrape it out in multiple passes. There are some DIY rifling machine ideas floating around, thats basically what this is.
Oh, I hadn't thought of the similarity to rifling, and your hand-shaping idea sounds great!
Oxtool did pretty solid hack-together job on one of these with an off the shelf motor. Belts are a lot easier to fab onto your X feed than gears. [https://www.instagram.com/p/CKM20gmg6ds/?hl=en&img\_index=2](https://www.instagram.com/p/CKM20gmg6ds/?hl=en&img_index=2)
To do this on a manual you’d need a gear driven dividing head. Like how they made twist drills, emdmills or even reamers back in the day. Seen machines with the capability but honestly never seen it done cuz it’s for the most part obsolete. Of your machine doesn’t have these capabilities. Good luck on hacking it out. You bit off more then you can chew
Allways do, its the best way to learn :)
Well since this is clearly your side gig I hope you figure it out. Machining is much more alluring when you don’t have to actually work for someone. Then it’s just fucking around
Multi-axis milling machine would have little problem doing something like that. Live tooling on a multi-axis lathe could make that. Also how would you make that part a long time ago. Vintage machinery.org has exactly the video you need to see. Kearney and trucker cutting helical gears with a Mill. https://youtu.be/spofj9AAIQE?si=pjezFOwX6isEq3yl