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Drilling tools \ Stepped drill bit
HSS Subland stepped drill bit type N, medium quality grade (DIN
8377)
For 180° cylinder head screws

Typ MK
HSS N
118°
Application: Execution:
For through holes in accordance with DIN EN 20273 ƒ Drill and countersink step with independent chip l1
and screw head countersinking 180° in accordance grooves and drill heels; regrinding does not affect l2
with DIN 974-1, series 1. For screws in accordance the profile
with DIN 6912, 7984, 34821, DIN EN ISO 1207, 4762, 180°
14579, 14580 Advantage: d1
ƒ precise alignment of drill diameter and countersink
diameter, lower process costs d2
ƒ universal use, therefore tool costs are reduced to a l3
minimum and user flexibility is increased

p. 762
Application Steel (N/mm ) Stainless steel Alu Brass Bronze Plas- Graphite GG(G) Titan- Nickel- Super- Hard mat.
2
No. <700 <1000 <1300 marten. austen. short long short long short long tics G(C)FK GjMW alloy alloy alloy <55 HRC <65 HRC
11115 30 20 40 50 40 35 20 15 20
Suitable for d1 (mm) d2 (mm) l3 (mm) l2 (mm) l1 (mm) Morse taper size f steel 700 ˜ 11115...
screw thread (mm/U) Ident. No.
M6 6.6 11 15 94 175 MK 1 0.1 006 ●
M8 9 15 19 114 212 MK 2 0.12 008 ●
M10 11 18 23 130 228 MK 2 0.13 010 ●
M12 13.5 20 27 140 238 MK 2 0.16 012 ●
M16 17.5 26 35 165 286 MK 3 0.18 016 ●
Prod. Gr. 1AR
HSS stepped drill bit short type N
For core hole centrings

Typ HA HB
HSS N
118°
Application: Advantage:
Drilling of thread core holes in accordance with DIN ƒ precise alignment of drill diameter and countersink
332-2, form D/DR. Simultaneous, precisely aligned diameter, lower process costs
insertion of centre hole, inlet for screw tap and ƒ universal use, therefore tool costs are reduced to a d3
thread core hole. minimum and user flexibility is increased d1 d2
Execution: 118° 90° 60°
ƒ profile-ground l3
l2
l1
L

Application Steel (N/mm ) Stainless steel Alu Brass Bronze Plas- Graphite GG(G) Titan- Nickel- Super- Hard mat.
2
No. <700 <1000 <1300 marten. austen. short long short long short long tics G(C)FK GjMW alloy alloy alloy <55 HRC <65 HRC
11121 30 20 40 50 40 35 20 15 20
Tool holding device HA parallel shank HB parallel shank
Suitable d1 (mm) d2 (mm) l3 (mm) l1 (mm) l2 (mm) L (mm) d3 (mm) f steel 11121... 11122...
for screw 700 ˜ Ident. No. Ident. No.
thread (mm/U)
M4 3.3 4.3 11 23 12.6 63 8 0.04 004 ● - -
M5 4.2 5.3 13 27 15.1 67 10 0.05 005 ● - -
M6 5 6.4 16 33 18.9 71 12.5 0.07 006 ● 006 ●
M8 6.8 8.4 19 41 23 88 14 0.08 008 ● 008 ●
M10 8.5 10.5 23 47 27.7 90 16 0.1 010 ● 010 ●
M12 10.2 13 28 59 34.5 105 22 0.12 012 ● 012 ●
M16 14 17 35 67 41.3 132 25 0.16 - - 016 ●
M20 17.5 21 38 77 48.3 145 31.5 0.18 - - 020 ●
Prod. Gr. 112

Source: Hahn+Kolb Werkzeuge GmbH
Technical data subject to change. www.iconridge.com 89
Availability subject to country specific rules and regulations.