Need Help!- pocket maching with long 1/2 tool

[makbari]

anybody knows the best way to machine pocket with 0.3 depth ,
I can not use any big dia tools just 1/2 dia endmill or less and from top of part to top of pocket is 4.5", I tried several way and did not work,
tried several speed and feed and still have problem on corner,
any idea?! thanks

[bildoo]

try pre drilling out the corners, then with such a long tool maybe only step down .03 in depth each pass. then do 2 or more finish passes. i have had good luck with using solid carbide endmills that are long in over all length but only maybe have 1/2 inch of flute then are slightly under cut above the flute. they wont touch the walls above the pocket as much. this wont be a fast process.

[makbari]

Originally Posted by bildoo try pre drilling out the corners, then with such a long tool maybe only step down .03 in depth each pass. then do 2 or more finish passes. i have had good luck with using solid carbide endmills that are long in over all length but only maybe have 1/2 inch of flute then are slightly under cut above the flute. they wont touch the walls above the pocket as much. this wont be a fast process.

I already did that and did not really work,

[murrayclair]

Write drilling/grid pattern and rough the pocket with plunge moves. The number of holes in x and y will determine the stopover, you can tweak this to be optimal. When you call the point drilling cycle and the cnc puts a spot drill and 1/2" drill in just erase the spot drill and change the drill to an end mill.

[allsportref]

How do i post a new Question ?

[christinandavid]

You just did...

[allsportref]

This is on someones posted question.

[christinandavid]

Yes I agree it's not too obvious at first glance.

Go to bottom right of screen 'Forum Jump' and select appropriate forum for your question.

At top left of list there should be 'New Thread' icon. Click that then type in your question.

DP