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Speed and feed rate for 1 1/4" Carbide Index tool?

Please give me your thoughts

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Alvin Schlitter21/01/2010 00:06:41
14 forum posts
Hello All;
I just received a new 1 1/4" indexable insert cutter for my ZAY7045FG/1
Milling machine. Are there others that have a similar tool? What I would like is the speed at which one should run the tool at as well as the advancement rate of the material against the cutter.
According to  Harold Hall in his book, Milling: A Complete Course  #35; he recommends a speed for 1/2" HSS cutters at 500 RPM. Based on this a 1 1/4" (31mm) diameter tool one should use a speed of around 200 RPM. However this is a carbide tool and one can double the speed or more.
I tried a speed around 400 RPM and the machine seemed to hammer a bit, I raised the speed to around 600 RPM and it sounded much better.  I checked the
tool and material after dry milling a fairly deep and wide cut and both where fairly cool.
 
Please provide you thoughts!
 

Eric Cox21/01/2010 09:21:42
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557 forum posts
38 photos
What material are you cutting ?
 
Circlip21/01/2010 13:50:02
1723 forum posts
Don't forget the NUMBER of teeth on the cutter Alvin.
 
  Regards  Ian.
Alvin Schlitter21/01/2010 23:00:40
14 forum posts
This particular cutter has 2- Inserts in the head, the material that I most often cut is low carbon steel!
Ian S C22/01/2010 07:37:47
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7468 forum posts
230 photos
Alvin this won't be much help,but when I bought my mill,and got a 50mm,3 insert cutter I asked the salesman what feed rate and speed and depth of cut I should use,he said give it a couple of mm cut at 900rpm,and crank like hell.I usually try for a 1mm cut at 540rpm,and I could not quote a feed speed,I just go by feel,afraid all I know is what I taught myself.Ian S C
Eric Cox22/01/2010 10:29:17
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557 forum posts
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Low carbon steel has a cutting speed of approx.300 fpm. dependent on hardness with a carbide cutter .
 rpm = (fpm * constant)/cutter dia.
 
 = (300*4)/1.125 = 1066 rpm
Ian S C22/01/2010 21:41:14
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7468 forum posts
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Going by that figure I'm not too far away,the figure for 2"-50mm = 600 rpm, my 540 rpm is not too bad,and a bit better than the 900 rpm quoted to me by the "expert"!Ian S C
Circlip23/01/2010 10:59:00
1723 forum posts
How would the machine cope with 1066RPM and 1/4" depth of cut??
 
   ------- Walkies???
 
     Regards   Ian.
Eric Cox23/01/2010 11:13:07
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557 forum posts
38 photos
Look at these for info on speeds and feeds
 
 
 
 Oh, by the way circlip, weld the machine to a metal table, bolt table to a concrete plinth. QED.
 

Edited By Eric Cox on 23/01/2010 11:22:00

Circlip23/01/2010 11:32:13
1723 forum posts
Wish there was a thumbs up Smilie on this Forum Eric.
 
   Regards Ian.
Martin W23/01/2010 12:58:12
940 forum posts
30 photos
Ian
 
 
Nuff said
 
Martin W

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