Shell end mills, semicoarse teeth, type NR

624275 High-speed steel HSS Co5 DIN 1880

D js 16	d H 7	l₁	Z	Item code	On stock
40	16	32	6	624275.040	Yes
50	22	36	6	624275.050	Yes
63	27	40	8	624275.063	Yes
80	27	45	8	624275.080	Yes
100	32	50	10	624275.100	Yes

Cutting conditions

Material	Strength	A_e	A_p	V_c	fz(mm/z) Ø 40	Ø 50	Ø 63	Ø 80	Ø 100
P.1 \| Free-cutting steels, general construction steels	≤ 600 N/mm²	0,8xl₁	0,75xD	45	0.096	0.102	0.12	0.132	0.138
P.2 \| General construction steels, steel castings	≤ 850 N/mm²	0,8xl₁	0,75xD	39	0.096	0.102	0.12	0.132	0.138
P.4 \| Heat treatable steels	≤ 900 N/mm²	0,8xl₁	0,75xD	30	0.096	0.102	0.12	0.132	0.138
M.2 \| Corrosion- and acid-proof steels	750 - 850 N/mm²	0,8xl₁	0,75xD	15	0.096	0.102	0.12	0.132	0.138
K.2 \| Cast iron (> 240 HB)	> 800 N/mm²	0,8xl₁	0,75xD	25	0.096	0.102	0.12	0.132	0.138

Calculations of cutting conditions

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Straight bore with standard keyway and driving slot according to DIN 138.

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Helix angle = 30°. Rake angle = 12°.

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Very high performance high speed steel with good toughness for milling cutters and for milling of materials up to the strength of 1200 MPa.

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For roughing operation and materials of lower and medium strength (up to 700 MPa), surface roughness Ra 12,5 and more.