Which tool do I need?

[Dirty_Vinylpusher]

Hey guys, which tool, or rather; what shape of tool do I need to make the thing in the picture below with my lathe?

It's 60mm round stock aluminium, and I need to make a collar/flange/whatever you'd call it, on each end.
I'll need to shrink the diameter down to about 40mm in the middle section so I can drill a couple of holes in the collar at each end for bolts.

I'll most likely be making the tool myself from a piece of HSS toolsteel.


Any pictures, links or drawings greatly appreciated.
Cheers.

 

[tel]

I'd just use a square ground parting tool

 

[Tin Falcon]

Like tel said: when I ran the cnc lathe we used to make lots of fairly wide deep grooves like that in 4140 or something like that iirc rc 35 -40 . used repeated plunge cuts then took a finish cut with the same tool.
Tin

 

[Dirty_Vinylpusher]

Pictures please guys, pictures.
Remember I'm a noob when it comes to this stuff.

 

[Tin Falcon]

DVP :
You would do well to download and read US Army machine tool manual TC 9-524
look at chapter 7 page 7
http://www.metalworking.com/tutorials/army-tc-9-524/ch7.pdf
look at the square nose or end cutting tool.
Tin

 

[Dirty_Vinylpusher]

Thanks Tin, but I can't get the link to work :shrug:
It redirects me to a page with a "cached version" but that has no pictures...
Also tried typing in www.metalworking.com/tutorials/army (and other combinations of it) but no luck.



I did a search for square nose cutting tool.
You talking about something like this?

Cheers.

 

[Brian Rupnow]

There are about a dozen ways to do that cut, but one I have been most succesfull with is a series of plunge cuts with a cut-off tool. As Tel says, a square ground HSS tool. A cut off tool is square ground but only 3/32" wide. Use a slow speed and lots of cutting fluid.

 

[tel]

I just use a straight parting bit - upside down in the rear post, but yes, that would do it.

 

[tel]

Oops - this is the pic I was looking for - exactly what you are trying to do.

 

[Tin Falcon]

Thanks Tin, but I can't get the link to work

hmm not working for me now either timed out was working earlier

try this one
http://www.metalwebnews.com/machine-tools/toc.pdf
brings up the whole book click on chapter 7 in the side bar then scroll to page 7
tin

 

[Dirty_Vinylpusher]

Thanks guys that helps a lot.


And TinFalcon, that's a good handbook.
I'll defenitely be giving that a closer look.



Cheers.

 

[Tin Falcon]

take a look at this also

Tin

 

[Dirty_Vinylpusher]

Well I got it sorted in the end.
Kept changing the shape of the tip as I went along and in the end it worked pretty well.

There's not much left of that piece of HSS steel though.... :big:


Here's the result.