which drill better

[mirek1017]

Good morning All ,

I would like to know your opinion 

I have to drill  A36 steel 2 inch deep holes  .Some  hole is 1.125 dia  and  .687 .I want set up this job on VF 4 (**coolant thru**).

Which drill would be better  ,the indexable style or tip drils??

thanks for any suggestions.

[Tim Johnson]

The better choice is the one you didn't ask, coolant thru solid carbide drill.

[mirek1017]

1.125 DIA ?????

[Pilot Plant Supervisor]

I like Kennametal KSEM drills

[jlw™]

If cost is a concern I would get a Allied Gen2 Spade drill and be done with it.

[Guest]

We have had good luck with these

 

http://ecat.ingersoll-imc.com/ecat/ProductSeriesDetails.aspx?ID=2058249

[mirek1017]

Thanks 

I think I chose Sumitomo SMDT   tip  drill .Cheaper than ingersol  .I have 200 holes for drilling 

 

thanks one more time 

 

[Guest]

1 minute ago, master80 said:

Thanks 

I think I chose Sumitomo SMDT   tip  drill .Cheaper than ingersol  .I have 200 holes for drilling 

 

thanks one more time 

 

I think we're close to 36,000 holes now.......   

[mirek1017]

2 minutes ago, JParis said:

I think we're close to 36,000 holes now.......   

no coments

[Tim Johnson]

5 hours ago, master80 said:

1.125 DIA ?????

I missed that one. I saw the Ø.687 and instantly thought solid. The Mitsubishi drills do only go to 20mm but we've replaced both the replaceable tip and the indexable insert drills (Ingersoll) with the coolant thru solid carbide.

[Ewood42]

FWIW, I've had great luck Kennametal KSEM, but not the cheapest out there. They are however good at taking punishment when an operator forgets to change out inserts...

Sumitomo are a reasonably effective cheap alternative.

If you need something that really rip through mild steel in a hurry, sandvik makes some really nice replaceable tip drills, I believe they were corodrill 870s. I think I've fed those as fast as 45ipm in A36. No chatter or squealing, just the sound of chips splattering on the housing, and come out pretty accurate given how fast they were feeding. Not at all cheap though.

[jlw™]

I would go sumocham for that application every time.

[mirek1017]

38 minutes ago, Ewood42 said:

FWIW, I've had great luck Kennametal KSEM, but not the cheapest out there. They are however good at taking punishment when an operator forgets to change out inserts...

Sumitomo are a reasonably effective cheap alternative.

If you need something that really rip through mild steel in a hurry, sandvik makes some really nice replaceable tip drills, I believe they were corodrill 870s. I think I've fed those as fast as 45ipm in A36. No chatter or squealing, just the sound of chips splattering on the housing, and come out pretty accurate given how fast they were feeding. Not at all cheap though.

you think  I can speed 45 ipm on haas VF4  ???

[Ewood42]

6 minutes ago, master80 said:

you think  I can speed 45 ipm on haas VF4  ???

Might be able to get close. When I got to test them (management got a bit of sticker shock at the price) I ran them on one of the oldest, most beat up machines in our shop. An old komo that still had a tape reader installed. Might not be able to go quite that fast, but it's one of the few tools I've tested where the recommended numbers out of the book actually worked without wearing down the insert after 10 holes.

 

Guess it depends on the how old and beat up the machine is. I've made some pretty aggressive cuts with a VF4 before, but it was fairly new.

[mirek1017]

37 minutes ago, Ewood42 said:

Might be able to get close. When I got to test them (management got a bit of sticker shock at the price) I ran them on one of the oldest, most beat up machines in our shop. An old komo that still had a tape reader installed. Might not be able to go quite that fast, but it's one of the few tools I've tested where the recommended numbers out of the book actually worked without wearing down the insert after 10 holes.

 

Guess it depends on the how old and beat up the machine is. I've made some pretty aggressive cuts with a VF4 before, but it was fairly new.

Thanks 

[jeff]

On 3/16/2017 at 0:57 PM, JParis said:

We have had good luck with these

 

http://ecat.ingersoll-imc.com/ecat/ProductSeriesDetails.aspx?ID=2058249

Those are very similar to the Seco Crown Loc that we use.  Great drills.