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Home Workshop Milling Feeds and Speeds

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RadRod67:
Thanks Dave very helpful :D

hopefuldave:
Thanks Dave, useful reminder!

I'll add a useful sanity clause - a Horsepower at the spindle can in ideal conditions[1]; remove one cubic inch of steel or up to three of aluminium per minute, so one can multiply out width and depth of cut and feed rate to get a HP requirement and compare it to motor power, determining whether you have enough oomph for the cut - if you find the cut would take 2HP and you have a 1/2 HP motor power reaching the spindle after losses in belt/gears reduce the depth of cut to suit, not the feed rate, too slow a feed will cause the cutter to rub, overheating the cutting edges - the tool won't break but it will blunt pretty quickly!

I'm not sure you gave enough emphasis to rigidity...

Dave H. (the other one)

[1] Ideal Conditions: Sharp cutter, Rigidity, flood coolant, Rigidty

DaveH:
Dave,
Good point:  reduce the depth of cut - not the feed rate.  :thumbup:
 :beer:
DaveH

piper1:
Great information thank you.

kayz1:
Another thank you from me to..saved on hdd and also printed for workshop draw.
 Lyn.

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