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Articles marked ◊ are not held in stock, procurement is effected at short notice.
Cutting Tools
1
Design:
HSS, DIN 343, type N.
Profile grinding, steam tempered surface, right cutting.
Normal angle of rake, normal core thickness and without core
gradient.
The spiral length is longer than the height of the bushes.
Application:
For drilling out pre-drilled, pre-cast or pre-punched
holes. The sturdy construction and 3 blades means that alignment
inaccuracies and runouts in pre-drilled holes are corrected.
Furthermore, the drill wall surface is improved so that a reamer can be
subsequently used for perfect final reaming. Please pay attention to
the column "smallest ∅ of pre-drilled hole".
Note:
The cut diameter must be smaller than the hole to be drilled out.
Further dimensions or HSS-E designs or VHM/HM assembly or long
flute counter bores according to DIN 1864 available on request.
Order
No.
Steels
up to
850
N/mm
2
Steels
up to
1000
N/mm
2
Steels
up to
1400
N/mm
2
Steels
up to
42 HRC
Steels
up to
52 HRC
Steels
up to
56 HRC
Steels
up to
60 HRC
Hard
machining
over
60 HRC
Stainless
and acid-
resistant
steels (INOX)
Ti steels,
Ti alloys,
special
steels
Cast iron
materials
Al, Al and
Mg alloys
Copper,
brass,
bronze
1085
30
25
10
25
45
Order
No.
∅ h8
mm
1085
steam
Spiral length
mm
Total length
mm
Smallest ∅ of
pre-drilled hole
mm
MK
0780
7.80
38.90
75
156
5.6
1
0880
8.80
56.90 ◊
81
162
6.3
1
0980
9.80
41.10
87
168
7.0
1
1000
10.00
50.40
87
168
7.0
1
1075
10.75
61.20 ◊
94
175
7.7
1
1100
11.00
45.40
94
175
7.7
1
1175
11.75
46.10
101
182
8.4
1
1200
12.00
43.20
101
182
8.4
1
1275
12.75
53.30
101
182
9.1
1
1300
13.00
47.50
101
182
9.1
1
1375
13.75
53.30
108
189
9.8
1
1400
14.00
48.20
108
189
9.8
1
1475
14.75
62.00
114
212
10.5
2
1500
15.00
54.00
114
212
10.5
2
1575
15.75
56.90
120
218
11.2
2
1600
16.00
55.40
120
218
11.2
2
1675
16.75
68.50
125
223
11.9
2
1700
17.00
59.10
125
223
11.9
2
1775
17.75
64.80
130
228
12.6
2
1800
18.00
60.50
130
228
12.6
2
1870
18.70
72.70
135
233
13.3
2
1900
19.00
63.40
135
233
13.3
2
1970
19.70
67.70
140
238
14.0
2
2000
20.00
59.80
140
238
14.0
2
2070
20.70
85.00
145
243
14.6
2
2100
21.00
79.20 ◊
145
243
14.6
2
2170
21.70
85.00
150
248
15.3
2
2200
22.00
79.20
150
248
15.3
2
2270
22.70
89.30
155
253
16.0
2
2300
23.00
84.30
155
253
16.0
2
2370
23.70
96.50 ◊
160
281
16.6
3
2400
24.00
92.20
160
281
16.6
3
2470
24.70
100.00
160
281
17.3
3
2500
25.00
87.80
160
281
17.3
3
2570
25.70
102.50 ◊
165
286
18.0
3
2600
26.00
99.40
165
286
18.0
3
2670
26.70
152.50 ◊
170
291
18.6
3
2700
27.00
119.00
170
291
18.6
3
2770
27.70
123.00 ◊
170
291
19.3
3
2800
28.00
109.00
170
291
19.3
3
2870
28.70
148.50 ◊
175
296
20.0
3
2900
29.00
132.50
175
296
20.0
3
2970
29.70
125.50
175
296
20.5
3
3000
30.00
132.00
175
296
20.5
3
(W109)
Counterbore with Morse taper Shank
steam
HSS
DIN
343
Type
N
Z
3
MK 1–3
120°
22°
Drilling tools
63