Re: Re:Re: CNC'ing a Mini Mill

Hi Jon, Ese and Steven

Thanks for your feedback.

>rpm = 20*1000 / pii * D
>mm/min = rpm * pii * tooth feed (to be safe use .05mm to start with)

>A gross value for HSS is 20 m/min, so with your 25mm 2 flute? (tooth) HSS the rpm would be ~250 rpm and the table feed ~25 mm/min.

So for 10mm 2 flute End mill the values would be 100 mm/min feed and 630 rpm.
With a depth of cut of 0.5mm, this would result in metal removal rate of 500mm^3 / min (0.03 in^3/min)

What would be the thrust for these values? or it it over the top for a 250kg bench mill?

What are the experiences that others have got from applying steppers to bench mills of this size - 250kg ( 550lbs) ?

TIA
John