Titex XD Technology drills

[Mjölnir]

I recently used Titex XD Tech drills to drill 15-20 times diameter deep in Ampcoloy 940 (similar to Mold Max but without beryllium, about Rockewell C 30 and usually not fun to drill) and was most impressed. Anyone have any experience drilling hardened materials with these tools? I've got a job on schedule requiring 15-20 times diameter deep holes in pre-hardened to Rockwell C 42ish 2714 steel and am wondering what kind of tool life can be expected from these tools.

[High Performance]

I recently used Titex XD Tech drills to drill 15-20 times diameter deep in Ampcoloy 940 (similar to Mold Max but without beryllium, about Rockewell C 30 and usually not fun to drill) and was most impressed. Anyone have any experience drilling hardened materials with these tools? I've got a job on schedule requiring 15-20 times diameter deep holes in pre-hardened to Rockwell C 42ish 2714 steel and am wondering what kind of tool life can be expected from these tools.

 

Not sure about these drills, but I have run 20+x on 4130 steel at 3/8" dia using OSG drills with 1000psi coolant, and up to 40x dia 3/16!!! dia Guhring (also in 4130).

 

how do you drill them? I had previously made a post adjustment for a customer to run in mastercam to simply use a drilling cycle and get gun drilling sort of output.

 

What I do is this

 

pilot drill with either this drill (or where tool life is concerned a short drill) to 1-2x dia

toolchange to long drill

no coolant and 100rpm, rapid to position

spindle to 1000rpm (depending on material, maybe slower), NO COOLANT

drill about 1x dia deeper (at like 2 ipm)

back off .005 in z

accelerate spindle to cutting speed, dwell, 1000psi coolant on

feed to depth no pecking (in 4130 - 3/8 drill feeding 32 ipm, 3/16 feeding at 12-14 ipm)

retract .01, coolant off, spindle 100 rpm

retract all the way out

toolchange, done

[Mjölnir]

Not sure about these drills, but I have run 20+x on 4130 steel at 3/8" dia using OSG drills with 1000psi coolant, and up to 40x dia 3/16!!! dia Guhring (also in 4130).

 

I doubt going much over 20x dia on anything with only having 250psi coolant available would be successful. I hope I can do 20 .343 dia holes 15x dia deep in the pre-hard 2714 with two drills because that's all they ordered.

 

Titex's recommended strategy is very close to what you're using. I haven't modified a post, yet. I manually wrote a sub program and called it at the hole locations. If we start doing more of this type of work consistently I'll write a macro instead. If it starts to become an everyday thing, then customizing posts would be justified.