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

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

This topic has 11 replies, 5 voices, and was last updated 23 January 2010 at 12:58 by Martin W.

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21 January 2010 at 00:06 #4927
Alvin Schlitter
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@alvinschlitter80339
Please give me your thoughts
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21 January 2010 at 00:06 #47647
Alvin Schlitter
Participant
@alvinschlitter80339
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!
21 January 2010 at 09:21 #47653
Eric Cox
Participant
@ericcox50497
What material are you cutting ?
21 January 2010 at 13:50 #47663
Circlip
Participant
@circlip
Don’t forget the NUMBER of teeth on the cutter Alvin.

Regards Ian.
21 January 2010 at 23:00 #47678
Alvin Schlitter
Participant
@alvinschlitter80339
This particular cutter has 2- Inserts in the head, the material that I most often cut is low carbon steel!
22 January 2010 at 07:37 #47683
Ian S C
Participant
@iansc
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
22 January 2010 at 10:29 #47685
Eric Cox
Participant
@ericcox50497
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
22 January 2010 at 21:41 #47713
Ian S C
Participant
@iansc
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
23 January 2010 at 10:59 #47726
Circlip
Participant
@circlip
How would the machine cope with 1066RPM and 1/4″ depth of cut??

——- Walkies???

Regards Ian.
23 January 2010 at 11:13 #47727
Eric Cox
Participant
@ericcox50497
Look at these for info on speeds and feeds

http://en.wikipedia.org/wiki/Speeds_and_feeds

http://its.fvtc.edu/MachShop3/speedCalc/SpeedRPM.htm

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
23 January 2010 at 11:32 #47728
Circlip
Participant
@circlip
Wish there was a thumbs up Smilie on this Forum Eric.

Regards Ian.
23 January 2010 at 12:58 #47734
Martin W
Participant
@martinw
Ian

Nuff said

Martin W
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