Tapper shank slot drills short, centre cutting, 2-fluted, 25°, type N

260545 High-speed steel HSS Co5 DIN 326

D e 8	MK	l₁	l₂	Z	Item code	On stock
12	1	85	14	2	260545.120	Yes
14	2	100	16	2	260545.140	Yes
16	2	105	18	2	260545.160	Yes
18	2	110	20	2	260545.180	Yes
20	2	115	20	2	260545.200	Yes
22	2	120	22	2	260545.220	Yes
24	3	140	25	2	260545.240	Yes
25	3	140	25	2	260545.250	No
28	3	145	28	2	260545.280	No
30	3	150	30	2	260545.300	Yes
32	4	175	32	2	260545.320	Yes
36	4	175	34	2	260545.360	Yes
40	4	180	38	2	260545.400	Yes
45	4	185	42	2	260545.450	Yes
50	5	220	45	2	260545.500	Yes

Cutting conditions

Material	Strength	A_p	A_e	V_c	fz(mm/z) Ø 12	Ø 16	Ø 20	Ø 25	Ø 30	Ø 40	Ø 50
P.1 \| Free-cutting steels, general construction steels	≤ 600 N/mm²	0,5xD	1xD	45	0.044	0.058	0.073	0.091	0.102	0.127	0.13
P.2 \| General construction steels, steel castings	≤ 850 N/mm²	0,5xD	1xD	39	0.044	0.058	0.073	0.091	0.102	0.127	0.13
P.3 \| Tool steels low alloyed	≤ 1100 N/mm²	0,5xD	1xD	24	0.044	0.058	0.073	0.091	0.102	0.127	0.13
P.4 \| Heat treatable steels	≤ 900 N/mm²	0,5xD	1xD	30	0.044	0.058	0.073	0.091	0.102	0.127	0.13
M.2 \| Corrosion- and acid-proof steels	750 - 850 N/mm²	0,5xD	1xD	15	0.044	0.058	0.073	0.091	0.102	0.127	0.13
N.2 \| Aluminium cast alloys Si (Si ≤ 12%)	≤ 600 N/mm²	0,5xD	1xD	30	0.044	0.058	0.073	0.091	0.102	0.127	0.13
N.4 \| Coper-zinc alloys, copper-tin alloys	≤ 800 N/mm²	0,5xD	1xD	35	0.044	0.058	0.073	0.091	0.102	0.127	0.13

Calculations of cutting conditions

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Morse taper shank according to DIN 228 A.

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Helix angle = 25°. 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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Universal usage. Suitable for materials up to strength 900 MPa.