Shell end mills, semicoarse teeth, type NR

684275V High-speed steel HSS Co5 DIN 841

D js 16	d H 7	l₁	Z	Item code	On stock
40	16	40	6	684275V.040040	Yes
50	22	50	6	684275V.050050	Yes
60	27	30	8	684275V.060030	Yes
60	27	60	8	684275V.060060	Yes
75	27	35	8	684275V.075035	Yes
75	27	75	8	684275V.075075	Yes
90	27	35	10	684275V.090035	Yes

Cutting conditions

Material	Strength	A_p	A_e	V_c	fz(mm/z) Ø 40	Ø 50	Ø 60	Ø 75	Ø 90
P.1 \| Free-cutting steels, general construction steels	≤ 600 N/mm²	0,8xl₁	0,75xD	37.5	0.096	0.102	0.155	0.126	0.132
P.2 \| General construction steels, steel castings	≤ 850 N/mm²	0,8xl₁	0,75xD	32.5	0.096	0.102	0.155	0.126	0.132
P.3 \| Tool steels low alloyed	≤ 1100 N/mm²	0,8xl₁	0,75xD	18	0.096	0.102	0.155	0.126	0.132
P.4 \| Heat treatable steels	≤ 900 N/mm²	0,8xl₁	0,75xD	25	0.096	0.102	0.155	0.126	0.132
P.5 \| Tool steels high alloyed	≤ 1100 N/mm²	0,8xl₁	0,75xD	18	0.096	0.102	0.155	0.126	0.132
M.2 \| Corrosion- and acid-proof steels	750 - 850 N/mm²	0,8xl₁	0,75xD	10	0.096	0.102	0.155	0.126	0.132
K.2 \| Cast iron (> 240 HB)	> 800 N/mm²	0,8xl₁	0,75xD	22	0.096	0.102	0.155	0.126	0.132

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.