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Centre drills
BS 60° Angle with chamfer
form B
HSS = hardness 63 HRC, to machine steels up to 800 N/mm², copper, brass, bronze, aluminium up to 6% Si.

Centre drills with protective chamfer quarantee the centre obtained from any risk of blows and deformation.
The play resulting from the protective chamfer makes it easier to load parts between points on machine with automatic feed.
General tolerances
Magafor 134
British standard
Material :
HSS
Form :
Angle 60°-Form B
with 120° chamfer
Serie :
right hand cut, shorts
Use :
machine use
Type :
Inch
Catalog 219 :
Packaging : Up to N°5-B :
Boxes of 10 pieces only
BS
N°
Dxd
mm
Dxd
inch
L
K
Reference
€ Unit
1-B
3,17x1,19
1/8x3/64
38
1,9
1,6-2,0
81134010000
10,67
2-B
4,76x1,58
3/16x1/16
45
2,8
2,0-2,4
81134020000
10,67
3-B
6,35x2,38
1/4x3/32
50
3,8
3,3-3,9
81134030000
10,67
4-B
7,93x2,77
5/16x7/64
56
4,8
4,1-4,7
81134040000
12,05
5-B
11,11x3,96
7/16x5/32
64
6,6
5,7-6,3
81134050000
20,37
6-B
15,87x5,55
5/8x7/32
76
9,5
7,7-8,3
81134060000
33,27
7-B
19,05x6,35
3/4x1/4
88
11,4
9,2-10,0
81134070000
58,51