speeds & feeds

[notso]

I was wondering if any of you guys have much experience w/ Monel? I have to machine a few castings w/ some pretty crazy stuff (geometry) going on & I was just looking for a decent (conservative) starting point.

 

Officially the alloy is QQ-N-288 w/ 65kpsi min tensile strength.

 

Does anyone have a suggestion? The castings cost $8200 each, so I'm pretty scared about breaking a tool & scapping a part.

[Code_Breaker]

I don't know about your grade of MONEL, but here is a few item with MONEL alloy 400 (same for 401, 404 and R405)

 

end mills Carbide tools:

1) doc = .020

fpm = 250

feed per tooth:

3/8 = .001

1/2 = .002

3/4 = .003

 

 

2) doc = .060

fpm = 190

feed per tooth:

3/8 = .002

1/2 = .003

3/4 = .004

 

Drilling:

fpm = 55

feed (in per rev.)

1/8 = .003

1/4 = .005

1/2 = .009

3/4 = .012

 

 

Hope this helps

[notso]

Thanks Code

[Joel Walker]

I used the same feeds and speeds as 316 stainless and it worked great.

[Threept82]

Monel cuts good if milled at same sfm as 304 or 316 stainless. You should get a good finish due to the high nickel content.

[Code_Breaker]

Both 304 and 316 have a lower surfaces feet, but, depending on your setup--rigidity, tool extension, age of machine, etc., these might be a good place to start as both Joel and threept82 have stated.

 

In case you don't have the numbers, here are the recommended info for 316 ss.

 

end mills Carbide tools:

1) doc = .020

fpm = 100

feed per tooth:

3/8 = .001

1/2 = .002

3/4 = .004

 

 

2) doc = .060

fpm = 75

feed per tooth:

3/8 = .002

1/2 = .003

3/4 = .005

 

Drilling:

fpm = 50

feed (in per rev.)

1/8 = .002

1/4 = .004

1/2 = .007

3/4 = .010

 

Life is good . . .

[notso]

Thanks again guys!

[X-L Engineering Corp]

What changes in tooling and speeds & feeds for Monel K500

[crazy^millman]

http://www.hpalloy.c...MONELK_500.html

 

http://www.jmprecision.co.uk/media/machiningnickelalloys.pdf

 

HTH

[X-L Engineering Corp]

Thanks

[X-L Engineering Corp]

Well we just got the orders and now I'm being ask if we should machine in an annealed state or age harden condition?