Cutting Formula of Corner Rounding

Determine spindle speed and feed:
To decide running speed of the tools and feed rate, please calculate spindle speed and
feed rate according to the following formula and cutting data:

Corner Rounding	Calculate spindle speed
	Designation			Formula
	d	diameter of the tool for calculation purpose	mm	d=2 x X
	X	tool radius offset (ref. RC inserts)
	x	tool radius offset (ref. R inserts)
	Vc	Cutting Speed	m/min.
	S	Spindle Speed	r.p.m.	(Vc x 1000)/(π x d)
	F	Feed rate per minute	mm/min.	Sxf
	f	Feed rate per tooth	mm/rev.
	Calculate tool length offest on machining center
	X	tool radius offset (ref. RC inserts)
	x	tool radius offset (ref. R inserts)
	Y	distance to the center of radius.
	TL'	tool length
	TL	tool length offset.		TL = TL’ - Y
	H	tool radius offset		H = X

RC Insert	Work Material		Vc (m/min.)	f (mm/rev.)	Grade of Insert
		Carbon Steel	150~320	0.05~0.10	NC40, NC2071
		Alloy steel	100~250	0.05~0.10	NC40, NC2071
		High alloy steel	80~150	0.04~0.08	NC40, NC2071
		Stainless Steel	65~125	0.05~0.10	NC9036
		Cast iron	150~250	0.05~0.10	NC40, NC2071
		Aluminum, AI-alloy Si < 12%	150~320	0.05~0.10	NC9036
		Al-alloy Si >12%	100~300	0.05~0.10	NC9036
		Cu	200~250	0.05~0.10	NC9036
		Brass and Bronze	150~250	0.05~0.10	NC9036
		Ti, Ti-alloy	40~80	0.03~0.08	NC9036

R Insert	Work Material		Vc (m/min.)	f (mm/rev.)	Grade of Insert
		Carbon Steel	150~320	0.05~0.10	NC2071
		Alloy steel	100~250	0.04~0.08	NC2071
		High alloy steel	60~80	0.03~0.06	NC2071
		Cast iron	150~250	0.05~0.10	NC2071