How to machine the end of a 1.5" dia rod perfectly round?

[toysareforboys]

I have a solid plastic (Delrin) cylinder, 1.5" dia x 3" long.

I need to make one end of it perfectly round, like the top of this:



I have a mini hobby lathe (BusyBee B-244). How would that be possible?

I can make it pointed, but want to try it round:



Let me know please and thanks!

-Jamie M.

 

[682bear]

Search for 'ball turner'... plenty of info about it...

-Bear

 

[toysareforboys]

Search for 'ball turner'... plenty of info about it...

-Bear

Wow, neat! Never seen such a device!! https://littlemachineshop.com/products/product_view.php?ProductID=2568

Looks great. Should that be the one I get? My lathe is set up for 1/2" shank size stuff so looks like it should work!

-Jamie M.

 

[682bear]

That should do fine on delrin... may be a little lightweight if you want to use it on steel.

Many of us have made our own ball turners... I tried to download a photo, but for some reason, the website won't let me right now...

-Bear

 

[toysareforboys]

That should do fine on delrin... may be a little lightweight if you want to use it on steel.

By steel do you mean aluminum? 99% of the stuff I do is aluminum or delrin.

Thanks for the quick replies

-Jamie M.

 

[682bear]

That one should be ok on aluminum... you may have to take light cuts to get a decent finish... IDK... I haven't used one like that.

-Bear

 

[markba633csi]

When we say steel we really mean steel, it's not a code word or anything like that LOL
being as how steel is harder to machine than other non-ferrous metals, some light duty machines struggle with it

 

[toysareforboys]

When we say steel we really mean steel, it's not a code word or anything like that LOL

I thought he meant metal

-Jamie M.

 

[Alexander McGilton]

Does nobody stop to ask what this guy is doing with a 40mm grenade launcher? The item in the first image is a less lethal round used by military and law enforcement. If you are a member of law enforcement, then it's a really bad idea to use home made projectiles, for in the event that you cause unnecessary harm to an assailant or protester you are taking on liabilities otherwise directed to the manufacturer. Not to mention any policies directed down through the chain of command.
http://www.defense-technology.com/p...shable-foam-round-1093449.html#sz=12&start=34

 

[toysareforboys]

If you are a member of law enforcement

Not a member, thanks

I just launch stuff, what else are you supposed to do with it?

-Jamie M.