Jobber drills with straight shank DIN 338

Straight shank stub step drills
Works Standard
medial tolerance, 90°
Range of applications
Manufacturing specifications
HSS
Article no. 85917
Type N
R
Standard drill for the efficient procuction
of clearance holes to DIN EN 20 273
and screw head angles of 90° to DIN 74
Section 1. For screws to DIN 7991.
The short design makes the tool very
resistant to torsional flexing and especially
suitable for use on CNC- and NCmachines.
Please note: The cutting speed should
be selected according to the large
(body) diameter and the feed rate according
to the small (pilot) diameter.
Point grinding: relieved cone
Point angle: 118°
Web thinned: to DIN 1412, form A
Helix angle: standard
Web thickness: standard
Web taper: standard
Flute form: standard
Tolerance on Ø: h6
Total length to DIN 1897
Step angle: 90°
Other manufacturing specifications to
DIN 1414
6,6...17,2 HSS
#d1# 85917
38
body-Ø
d 2
mm
step-Ø
d 1
mm
total length
l 1
mm
flute length
l 2
mm
step length
l 3
mm
for
threads
6.6 3.4 70 31 9 M 3
9.0 4.5 84 40 11 M 4
11.0 5.5 95 47 13 M 5
13.0 6.6 102 51 15 M 6
17.2 9.0 123 62 19 M 8
21.5 11.0 141 70 23 M 10
R
N
90°
118°
d1
d2
l 1
l 2
l 3
200
bright