Walter Tools Milling M4000: Slot Drilling, Chamfer milling, High-Speed Milling Cutter,Shoulder mill
Do you program them with the same sfm and chipload as carbide endmills?
I've only got a few to experiment with and if I blow through them too quickly, we might never get to buy them again.
I will be using them in A2 and S7 before heat treating tool steels.
Tool life and quality are the priorities here, not ultra fast production.
Thanks for any advice or opinions.
Chris Join Date Mar 2005 Location Silicon Valley, California.
I've seen speeds and feeds all over the map depending on who's drill, LOC, coated or uncoated, hardness at machining, style of drill, etc.
Did you buy with Coolant-Through?
Do you have Coolant-Through?
I generally go with thru tool coolant, carbide slot drills speeds and feeds peck, no spot, and coatings.
Generally, most drill makers have a pretty good online or phone support.
Many of them also have factory reps not dealers for many areas.
I'd check this out.
Otherwise, throw in some more details on your application, machine, coolant, and drill data maker, thru-coolant, coating, geometry, etc.
Can probably get you some "closer to the mark" answers.
You can peck but not too much.
If they are coolant-thru than don't peck.
Although I always do on the first one just so I can get a feel for how they are cutting and holding up.
My boss is generally pretty generous about buying good tools, click here he is reluctant with through coolant cutters because of the prices.
We have through coolant holders for the endmills and 3 coolant through drill chucks.
I am not sure why he purchased this new machine with the through coolant option, but is reluctant to buy any through coolant cutters.
Thanks surfacefeet, caesars slots casino itunes like I should run them slightly slower sfm than endmills.
We had dramatically better tool life with solid carbide drills in steel after going to shrink-fit tooling.
Thru-coolant would also rank high on the list of essentials.
After you get a feel for how they are running you may be able to kick it up a little bit.
Join Date Mar 2005 Location Silicon Valley, California.
Depending on the hole depth, I'd think "don't peck".
If you are going to use performance carbide drills in that material, 28-32 HrC use 225 as a starting SFM and the feed rate is always a percentage of the drill size.
Great tool life with those conditions, and very accurate hole size.
Performance carbide drills should drill within.
M01 saved the tap.
I was running at 180 sfm and.
But one of the cutting edges chipped on the first hole.
If I can't get less runout than this should I just give up and stick to cobalt?
Would I be better off with no spot?
Should I bump it up to 225sfm as tapman suggests?
Should I make the boss visit web page a better brand like garr or mitsubishi or possibly another?
Join Date Apr 2006 Location Tempe Az.
I would ask your boss for thru tool coolant drills.
I learned that the hard way too However After being skeptical to say the least, I tried a 6.
I do spot drill holes.
If the surface is "flat" or in relative perpendicularity with the drilling axis, carbide drills will generally perform better without a spot.
If you do need to spot though, then be sure to use a spot drill with an angle that exceeds the carbide drill itself.
For example, many carbide drills are built with a 130° tip angle.
So, for this you might use a 130° or 135° spotter.
Another trick, is to use a standard center drill but with one exception, center drill to a diameter thats only slightly larger than the web or core diameter of the drill.
This can also be done with your standard spot drills as well.
The reasoning behind this, is that a large spot will tend to cause a "bad start" with carbide drills.
And since carbide drills are commonly used for harder materials than soft, having a bad start can cause early drill failure, rapid carbide slot drills speeds and feeds, hole size problems, etc.
This is usually by way of top chatter or excessive carbide slot drills speeds and feeds on the drill corners or front land of drill on the lead cutting edge.
Chip control is another reason.
Most Carbide drills are to be fed at a non-pecking, continuous feed.
With a large spot at the lead, this can cause chip wrap onto the drill and into the flutes since the swarf is not large enough to actually break itself.
This can cause problems carbide slot drills speeds and feeds the drill progresses into the part because the flutes can't effectively evacuate the chips now.
This can lead to drill breakage, out of round holes, poor surface finishes, oversized holes and hole galling.
Should I drill with a G81 no peck the whole way?
Do you all of you feel the 120deg spot is creating the fracture in the drills cutting edge?
How long would check this out drills last at hss cobalt feeds and speeds?
With Cobalt drills I always spot but not with Carbide.
Since you dont have thru-tool coolant,then I would peck.
If u had it then I would say dont peck.
Try that with no spotting and with a peck and see if you can get it under control,running smoothly.
Then later you can try to boost things up a bit.
Join Date Mar 2005 Location Silicon Valley, California.
I've drilled plenty of holes without peck and without "Thru-coolant".
But this will largely depend on the drill and how well it can evacuate the chips, how deep the hole is depth ratioand to some degree, the diameter of the hole to begin with.
If the chips are a problem, carbide slot drills speeds and feeds by all means peck it.
But don't short peck like you would with a standard.
Use long ratio pecks.
Another trick I might do is not not back the drill out of the hole completely to keep from having the chips fall back in the hole.
Slamming into chips on a peck carbide slot drills speeds and feeds break down drills too.
Maybe even increase the peck retract distance in the machine parameters if you're drilling a lot of harder materials.
Practical Machinist is the easiest way to learn new techniques, get answers quickly and discuss common challenges with your peers.
If you want to know more or withdraw your consent to all or some of the cookies, please refer to the.
The latest industry news—straight to your inbox Sign up for our eNewsletter now to stay in-the-know.
We'll bring you the most relevant peer-to-peer conversations happening in the trade and tips and tricks to help you get the job done.
I agree to receive emails from Practical Machinist containing industry news and updates from Practical Machinist and its sponsors.
You may unsubscribe at any time.
GARANT MasterSteel FEED and MasterSteel SPEED
Drills 89 Solid Carbide Drills Speed and Feed Recommendations SPEEDS and FEEDS are suggested starting points only and may be increased or decreased depending on actual material and machining conditions. Start conservatively and increase speed and feed until drilling cycle is optimized. Workpiece Material Brinell Hardness (BHN) Morse List No.
Certainly. I agree with told all above.
I apologise, would like to offer other decision.
Bravo, this magnificent idea is necessary just by the way
Something so does not leave
It is remarkable, very amusing opinion
I can speak much on this question.
Thanks for the valuable information. I have used it.
In it something is. Now all is clear, thanks for the help in this question.
You are absolutely right. In it something is also to me it seems it is good thought. I agree with you.
While very well.
Absolutely with you it agree. In it something is also to me it seems it is excellent thought. Completely with you I will agree.
I join. I agree with told all above. Let's discuss this question.
What good words
In my opinion you are not right. I am assured. I can prove it. Write to me in PM.
It is rather valuable information
Very curiously :)
Very useful message
In it something is. Thanks for the information, can, I too can help you something?
You are mistaken. I suggest it to discuss. Write to me in PM, we will talk.