Does this look like it'll work?

[jwmay]

Yeah I get it. Been kicking around here for years, and still need advice. Sorry. I'm slow.

I'm making something for my Dad. He looked for two years to find this weight. I figure now is the time to make sure I'm not going to ruin anything. Tolerances on this are pretty well non existent, but I don't want it to be ugly. And I don't want to make a mistake that'll ruin it.

I'm about to very slowly feed this 1/8" thick 4 1/4" milling cutter held in an R8 slitting saw arbor 5/8" deep into this block of cast iron with a spindle rpm of 140 and then run it 9" across. That's the bottom limit for rpm. The calculator says I'm spinning about twice as fast as I should.
Option 1 is do it and see what happens.
Option two is use a .045 thick slitting saw that isn't large enough to get 5/8" deep.
Option three is whatever you all can agree on.
Does it look like my clamping is sufficient?
All input welcome!

 

[markba633csi]

You can't do what you want to do with an endmill?
I'd probably go with the thinner blade if you must use a saw
-Mark

 

[jwmay]

I just thought it'd be quicker to try to cut out as much material as I could. I'm open to suggestions. This is the original part. This shows what I have to remove I hope.

 

[jwmay]

And if a Mod happens by this way, Doors is supposed to be does. Stupid technology always making me look dumb. At least I think that's right.

 

[rabler]

If you use the "edit" option at the bottom of the first post, I believe you can change the title.

 

[sdelivery]

Since you can't lower your rpm do you have a smaller dia. Cutter?
If you can't lower the rpm ( I think you are going to see a lot of chatter)
I would probably take less depth of a cut but you need to maintain the tooth loading so that means faster feed....hence my suggestion for less depth of cut.

 

[jwmay]

Less DOC and higher feed rate. Ok I can do that probably.

 

[Ianagos]

Well not 100% sure what you are trying to do but your quil is extended waaay out there. And that’s a very large cutter for an r8 arbor so I suspect that won’t be the best setup.

Now I can’t really recommend anything better as like I said I don’t understand the goal.

I try to stay away from slitting saw and the like as much as possible. I’ve never had great luck with them seems like a endmill would do what you and doing with the saw if you reorient the part. Will probably make for an all around more stable setup.

 

[ErichKeane]

What material is that wheel? You might find that swapping it to a carbide tipped cutter (like for a small woodworking tool!) will make the cut better at the higher speeds.

 

[MrWhoopee]

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