.1255" diameter deep hole

[Metric]

Hello all,

Please give me some advise to drill a .1255" +/-.0005" hole at 2.5" deep on aluminum. A Sanvik rep. introduce me the CorroDrill solid carbide coolant fed will do the job. Any body using it?

Thank you 

MDT

 

[crazy^millman]

Get it on a test it does the job you buy it doesn't you give it back and go in a different direction.

[Machineguy]

If you have a tight machine, and the part is set up true, that might work. TSC will help a lot.

A 1 flute carbide drill might work.

The great fall back is a carbide drill and a carbide reamer to follow.

 

Machineguy

[JoshC]

1 hour ago, Metric said:

Hello all,

Please give me some advise to drill a .1255" +/-.0005" hole at 2.5" deep on aluminum. A Sanvik rep. introduce me the CorroDrill solid carbide coolant fed will do the job. Any body using it?

Thank you 

MDT

 

I'm Skeptical that it will hold that kind of tolerance, but some of modern tooling is pretty impressive so I could be wrong. I would do what Ron suggested and see if they will let you test one, if it works and holds tolerance I would go that route. If its just a size tolerance and not location then reamers can hold that easily.

[Metric]

Hi all'

Thank you for replied. The hole location is +/-.005" and it's blind hole, they don't give me the extra deep at bottom for reamer goes. that is why i can not use reamer.

Regards.

 

[RaiderX]

I think Guhring makes what you are looking for but, pilot hole and high pressure TSC will be a must.

Tall order.

[crazy^millman]

Here is another source I have used with great success.

20XD Drills PCT

These are great, but they only offer them up to 5XD.

5XD Drills PCT

[Metric]

Thank Ron & RiderX.

I will cal PCT to see if the drill can hold the size good for this depth.

Regards.

 

[jlw™]

Guhring will do it and hold the tolerance.  All while looking like a reamed hole.  Do it quite often.  I always check the drill in dummy stock tho, if it's not the right size it never will be.

[BrianP.]

You could also try 2 drills for holding size using the second drill as a "reamer". I have done this when there is no room at the bottom of the hole and it has worked well.