Drilling titanium

[Joels]

Hello, I am trying to drill 3 inches deep in titanium. The drill keeps walking off center at the end. Maybe .01. Rpm 450,feed .002 per rev, cobalt drill, any ideas on how to get a straight hole?

[wanle09]

needs more info size of drill?

[Joels]

Sorry, it's a n drill .302 dia cobalt

[K2csq7]

Use a carbide drill.

Coolant through is preferable.

[Mr. M]

What kind of a spot do you have? Also what are you taking for pecks?

[Joels]

We are doing .05 pecks with full retraction to get coolant on the drill

[CR]

Mitsubishi solid carbide drill coolant thru NO peck

#MWS0770X8DB (7.7 MM DIA x 3.4 loc X 5.6 OAL

100SFM & .002 IPR

 

I use them a lot in titanium

the one make an imprese is 0.125 dia drill coolant thru NO peck drilling 5.00 depth

[Newbeeee™]

If you're latheing, check the tool is on centreline/heigth and that the turret face is square to the work...

[Guest CNC Apps Guy 1]

The drill material is the problem. You need to be using a Solid Carbide drill. Coolant through and no peck would be best.

[Guest]

Go with the carbide

[Joels]

Thank you for the replies

[GoetzInd]

Checkout the widia varidrill. We've had very good luck with it in Ti. Titex too. I'm sure others here have specific recommendations as well.

 

 

Mike

[Jayson Kramer]

I go with the Titex to..

[Guest CNC Apps Guy 1]

Titex and Mitsubishi are my personal favorites. Though I've never been one to turn away Sumitomo either. Guhring is ok. Their catalogs are effed up. I need something WAY simpler to read.

[Joels]

I suggested carbide but it falls on deaf ears. I cant buy the tooling so i am stuck, We are using a cobalt drill 19/64 and it walked off center last night, scrapped a few parts. The whole drill mounting system we have needs to be redone as i cant say anything is straight!

 

Thank you all for your help.

 

Joel

[Reko]

Tell them, CNC stands for "Customer Needs Carbide"

 

Very rarely do I use anything else.

[K2csq7]

+1,

You won't get a HSS cobalt drill to stay on location through 3" of Ti..... if you do, it was just a fluke...

[GoetzInd]

You won't get a HSS cobalt drill to stay on location through 3" of Ti..... if you do, it was just a fluke...

 

I agree.

 

Mike

[K2csq7]

One thing that would help is to drill with a stubby cobalt drill first as deep as you can, then finish with the jobber drill.

If your machine has trouble repeating back to perfect location, don't let X or Y move while you toolchange...

[Joels]

We got a carbide drill and it is working perfect, thank you for all your input

[K2csq7]

We got a carbide drill and it is working perfect, thank you for all your input

How'd you get the powers to change their minds?

[Joels]

I suggested we use a carbide drill when we started this project but we used a cobalt drill, just a standard one, and we waisted a week and several feet of material until they bought the right drill. once we had the right drill it worked perfect from the first part and it still works now. i think the boos was under a lot of pressure and decided to get the right drill???

[CR]

which brand works for you?

[Newbeeee™]

I suggested we use a carbide drill when we started this project but we used a cobalt drill, just a standard one, and we waisted a week and several feet of material until they bought the right drill. once we had the right drill it worked perfect from the first part and it still works now. i think the boos was under a lot of pressure and decided to get the right drill???

Hahaha - good boss this....loose a weeks production and $k or so of material, then pony up a few dollars for the correct drill!!!

A mate works for a company that runs bonus and the management never want to spend anything on tooling because it comes out of the 'pot' at the end of the month. Sometimes the MAM gets turned off while it's waiting for a cutter (yes that is a cutter not 2 cutters because that would mean a spare and wasted money = less bonus for them).

[GIZMO 21]

It amazes me how some management look at how much the tools cost,and dont realize that by not spending the money for it alot of time is going to spend, alot of headaches and alot of bad parts,and at the end of the day they end up buying the right tool.

Dont get me wrong its ok to try to get by with what you have ,but when you need something special dam it get it.