[hanau]

I am trying to find a 1/16 end mill that will be long enough to go thru 1/4" aluminum .
Anyone have any suggestion where i could find a couple mills at?

[coherent]

You must not have searched much. 1/4in depth of cut is about average in 1/16 mills. You can get them with longer depth of cut and longer shanks. Just do a seach on ebay or the web. !/16th is pretty small for actually cutting out parts and your speeds and feeds need to be set carefully to avoid snapping the mill. If at all possible cut with a larger diameter mill and then finish any small pockets or tight profiles with the 1/16th. A one or two flute with a high helix will work best with aluminum. Just search for "end mills for aluminum".

[AARONT]

mscdirect.com they are pricey if you don't have coupon code but will typically have whatever you need.