425248.280 High-speed steel HSS Co8 DIN 845B, DIN 845C
Clamping element
Clamping feature
Type NR
Tool geometry
Feed direction possibility
Material HSS Co8
D
k 12
MK l1 l2 Z Item code On stock
28 3 192 90 5 425248.280 Yes

Cutting conditions


Material

Strength

Ap

Ae

Vc
fz(mm/z)
Ø 16

Ø 20

Ø 25

Ø 32

Ø 40

Ø 50

Ø 63
P.1 | Free-cutting steels, general construction steels ≤ 600 N/mm² 1,5xD 0,5xD 45 0.07 0.09 0.1 0.121 0.133 0.141 0.152
P.2 | General construction steels, steel castings ≤ 850 N/mm² 1,5xD 0,5xD 39 0.07 0.09 0.1 0.121 0.133 0.141 0.152
P.4 | Heat treatable steels ≤ 900 N/mm² 1,5xD 0,5xD 30 0.07 0.09 0.1 0.121 0.133 0.141 0.152
M.2 | Corrosion- and acid-proof steels 750 - 850 N/mm² 1,5xD 0,5xD 15 0.07 0.09 0.1 0.121 0.133 0.141 0.152
K.1 | Cast iron (< 240 HB) ≤ 820 N/mm² 1,5xD 0,5xD 35 0.07 0.09 0.1 0.121 0.133 0.141 0.152
N.4 | Copper-zinc alloys, copper-tin alloys ≤ 800 N/mm² 1,5xD 0,5xD 80-120 0.07 0.09 0.1 0.121 0.133 0.141 0.152

Calculations of cutting conditions

Product attributes

Clamping element

Clamping element

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Morse taper shank according to DIN 228 A.
Type NR

Type NR

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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.
Feed direction possibility

Feed direction possibility

Clamping feature

Clamping feature

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Morse taper shank acc. to DIN 2207.
Tool geometry

Tool geometry

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Helix angle = 30°. Rake angle = 12°.
Material HSS Co8

Material HSS Co8

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Extra high performance high speed steel with good toughness and great temperature resistance. It is applicable especially for milling of materials with high strength, austenitic steels, steels for warm working, etc.