Deep hole drilling

[Mike DDD]

I've seen some impressive vidieos on youtube of single peck drilling with coolant through the spindle. We have a fadal with coolant through, and drill 7/16" and 9/16" holes 6" to 12" deep in 6061 and 7075 aluminum. I would like to use the no peck and see how much we could speed up the process. Does anyone have experience with the process, if so what kind of tooling and cutting parameters are you using?

[YoDoug®]

Mitsubishi all the way. We ran 30x deep .187 holes with Mits coolant through drills in 7075 forgings with great results. You need to use a stub mits for a pilot hole then feed in reduced rpm, speed up rpm, and then go like hell.

[Guest CNC Apps Guy 1]

Titex makes very good CTS Drills as well. Mits and Titex are my two favorites. If I'm on a budget, CJT is not bad though you will not get nearly the variety/range of tools.

 

Titex's numbers in their catalogs for speeds and feeds are spot on for rigid setups.

 

 

[EX-wccprogrammer]

Titex here also, not only in aluminum, but steels and stainless also. Catalog recommendations are spot on, no pre-drill required.

 

BTW, Titex has been bought out by Walter. Same drills though...

[Bruce Caulley]

+ eleventy billion for Titex and Mitsubishi.

 

Bruce

[Newbeeee™]

BTW, Titex has been bought out by Walter. Same drills though...

 

Who are owned by Sandvik

[MAM 147]

IM RUNNING TITEX A6585TFT-11/32IN DRILL IN 6061 ALUM AT 13850RPM AT F180.0IPM

WITH 1000PSI COOLANT THRU TO GO 12 TIMES DIA DEEP.

AND AS MENTIONED ABOVE YOU NEED TO USE THER PREP DRILLS TO PREP HOLES,

FEED IN AT REDUCED SPEED AND FEED THEN RAMP TO FULL SPEED AND FEED.